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Prologue

Issei Hyoudou, by the very definition, is an honest individual. He wears his heart on his sleeve almost like a badge of honor. He never tells a lie and is always straightforward in his answers. He always hones up to his mistakes and takes full responsibility for his actions.

However, he is also a huge pervert. He loves to look at porn, play eroges and other naughty games, and read hentai in his spare time. He proudly declares his love for women's breasts, much to his peers annoyance and even takes time to stare at them once in a while. Then there is his dream: to become the Harem King; a dream so valued to him, that he has no problem shouting out at the top of his lungs to the world.

Due to his perversity, Issei has been labeled many things: a disgusting pervert, a beast, potential sex offender (that one he takes great offense to), and so on. Despite all his good traits, despite all his honesty, and despite all his effort he is looked at by most as nothing more than a worthless pervert.

That is, except for by a few individuals.

Two of those select few know Issei better than anyone else will ever claim to. They are his younger brother Rito and little sister Mikan.

There is perhaps nothing more sacred and valued in the world to Issei than his younger siblings. They are his entire world and more. When they were younger, the two used to follow him and his two best friends like little puppies, but he didn't really mind. When they were born, his parents told him that it was his duty as the eldest to look after them, no matter what, that it was his job to take care of them. At the time, the brown haired boy perhaps did not truly understand what his parents meant but nonetheless, he took those words to heart.

When Mikan was born, he was five and Rito was two years younger than him. For a while, the five of them lived like a normal happy family. Issei would get into trouble with his friend, get scolded by not only his other friend but also by his parents, and then he would try to do something to impress his young siblings. However, as the three got older, they were the only ones in the house most of the time.

Due to his parent's jobs, they were constantly out of the house; his mother's fashion designer job required her to be out of the country for months at a time and his father's mangaka career demanded exact deadlines causing him to rent out an apartment in order to meet those deadlines. This did not mean they never visited; their father only lived a half hour away and their mother visited whenever she could. For the most part though, it was just Issei and his younger siblings.

With his duty in mind, Issei stepped up to the plate and tried to take care of the two. He tried doing laundry, cleaning, helping them out, and even cooking for them. These attempts did not always end in success and more than not ended in failure at first, but all this did was strength his resolve. In his mind, he could not back down, because if he did, he could no longer say he was their older brother.

There were the ups though: he did learn how to cook rather impressively and his dedication to things helped him improve in other areas as well. When he was twelve years old, Issei was running the household by himself.

However, as time passed and his siblings got older, their reliance on him became smaller and smaller. Mikan had begun learning to cook herself from watching and getting lessons from him and outside the house. Not to mention, she had learned how to do a lot of the housework either by watching or learning from the eldest. Rito on the other hand began to take an interest in the garden in their backyard and so he began reading books on how to maintain it and add to it.

By the time he was fifteen, Mikan had already taken over taking care of the household and most of the chores. Rito was taking care of the garden and was trying to go out for other things such as soccer. No longer were there any sounds of 'Nii-san' filling the house or younger siblings running to Issei to ask him for help. No longer was he 'Nii-san'; now he was just Issei. The two did not follow him around anymore or really come to him for help, though that may also be a result of him growing as a pervert as time marched on by. It was clear to the pervert: his siblings did not need to rely on him anymore. Rito and Mikan were more than capable of taking care of themselves and solving their own issues.

That did not stop Issei though. Just because he was no longer needed, did not mean he would stop trying to take care of them. He would make attempts at making dinner or breakfast, which led to him being overthrown and kicked out of the kitchen by Mikan. He would try to show his younger brother the glories of breasts and embracing the inner Hyoudou pervert; of course, this all resulted in Rito glowing red, covering his eyes, and running back to his room, though Issei was sure he was starting to come around, they always did.

And what of Issei's young siblings? What were their thoughts on their older brother?

When they were younger, the two had nothing but awe and respect for their elder brother. He was a hero that fought against bullies, whether it was their own or other kids, and protected the innocent. He was there to make them laugh, comfort them when they cried, and hold them and assure them everything would be alright when a storm came around.

However, as time moved on, the awe and respect that the two held for their brother slowly disappeared. They distanced themselves from him, no longer following him around, getting interested in their own things. That did not mean they did not love their brother, by no means did this mean that. Though, when his perversion began to gain momentum that did alienate them a little from him. It was a bit difficult going out in public with him and coming across a classmate of his who looked at him with disgust or contempt for being a pervert. It was made even worse when you are known as his younger sibling. Rito had it a bit harder seeing as how he was normally always around Issei due to the latter seeking out the former during every lunch period.

Mikan had a little bit of an easier time, though she did not want any of her friends to know that her brother was a huge pervert; she still wanted a social life afterall.

But despite their problems with their brother's (un)natural love for a female body part, they still saw through him and understood him better than most people. It was safe to say that Rito and Mikan understood Issei the best with only one person understanding him at an even higher level. And for the most part, the three lived a relatively normal life. Issei and Rito were in high school and Mikan was attending elementary; they got up in the morning, ate breakfast together, headed off to school (after dodging Issei's attempts at giving a goodbye hug), attended school, get in crazy shenanigans that involved a lot of running and kendo stick bruises (though admittedly that was more Issei than either Rito or Mikan), head home, eat dinner, take a bath, go to sleep, and wait for the next day to repeat the same process. It was routine, a bit mundane at times, but acceptable for the most part. So the siblings lived a normal, everyday life.

Until that fateful day where the universe got bored.

Looking back at what happened, neither Rito nor Mikan could understand what exactly happened, all they know is that it started when Issei came home one day from school all cheerful and upbeat.

At the time, Issei and Rito were both attending Kuoh Academy with the eldest being a second year and the younger of the two being a first year. Kuoh Academy is a former all girls elite school where bright minds came to learn. A few years ago though, the school decided to open its doors and become a coed school. The reason Issei chose to attend was clear, all one needs to do is to look at the ratio of boys to girls and see how badly the girls outnumber the boys; Issei's one dream in life is to become the Harem King and with a school with a lot of girls, it would be simple to get a harem. At least, that is what he thought. Due to his open perversity, many girls came to despise him and become disgusted by his words. Along with his two best buddies from middle school, Matsuda and Motohama, the two were dubbed "The Perverted Trio", the most infamous and perverted students in all of Kuoh, only rivaled by one other group, but that is something else entirely.

Rito on the other hand, chose to attend Kuoh as it was not only the closest to their home, but it was the only school that had real quality education that he could use for later down the road. Also, there was the matter of a girl he knows that is also attending Kuoh, but that is neither here nor there. And despite how much he wanted to deny it, the middle child of the family chose to attend Kuoh so he could watch out for his brother.

Both Rito and Mikan could still remember that day vividly. The brothers were walking home from school. Issei stopped on the bridge to lament how he believes he will never get a girlfriend while Rito tried to both comfort his brother and not laugh at the untrue statement. However, before the two could go anywhere…

"Um, excuse me, you're Issei Hyoudou, right?"

A cute raven haired girl had stopped them asking to speak to Issei alone. The first year continued onward to home, leaving behind both his brother and the mysterious girl. It was not even five minutes later when the messy brown haired boy had caught up and began skipping past Rito in a joyful manner. This scene made Rito stop dead in his tracks and watch his older brother in both confusion and wonder. The only thought running rampant in his head was 'What did that girl say to him?'

When the two finally returned home, Mikan was in the living room watching "Magical Girl Kyoko-chan". Issei, still donning his more than normal happy grin, hugged the girl before rushing into the kitchen. The youngest child could only look on in confusion at what had just occurred. She turned to her older brother, who could only shrug, himself not knowing of the reason. The two of them made way after their brother and were shocked to see him adorning an apron and him begin cooking.

At first, Mikan was about to kick Issei out of the kitchen, but then she noticed it. His look of pure bliss and joy adorning his face; this was perhaps the happiest either sibling had seen the eldest in a while. So, she decided to let it go and let Issei continue cooking. A while later, the three were sitting at the table, the chef bringing the dinner he had just cooked to them. The brown haired girl need only take one look and take one sniff to know that what her brother made was going to be delicious. But there was something that needed to be cleared up that both Rito and Mikan wanted and needed to know. So Mikan asked Issei what had happened.

He sported a large, goofy grin as he simply replied, "I got a girlfriend today!"

The look of pure shock and bewilderment that decorated the younger sibling's face would be one that Issei would never soon forget, though he did wish he had a camera to record the memory.

What followed next was a series of phone calls from their father and mother. Both were just overjoyed that Issei had gotten a girlfriend as well as being the one to be confessed to. They had told him that they wanted to meet her next time they had the time. For the next week, his siblings could tell that Issei was on cloud nine; he looked absolutely ecstatic whenever he talked about "Yuuma". Rito had met her while he and Issei walked to school and his thoughts on her were that she was a rather beautiful and extremely benevolent girl. On Saturday, Yuuma had asked Issei on date the very next day and he didb't believe life could get much better. He dressed his absolute nicest, he attempted to comb his hair, he bid farewell to his younger siblings, and he was out the door, ready for his date.

That was the last time the two had seen Issei genuinely smile for a long while.

It was around noon on Sunday when Issei had left to go on his date, leaving the house to Mikan and Rito. The older of the two decided to stay home and just play video games and relax. Mikan on the other hand decided to go out and do a little grocery shopping. By the time she got back, it was three in the afternoon. So, for the next few hours, she spent her time finishing up some housework and watching television.

It was around nine o'clock when the sun began to set and Issei was still not home. Rito was a little worried, but Mikan reassured him that their older brother was more than likely still on his date. Hell, she said that he might not even be home until tomorrow and they would be checking in somewhere. Of course Rito turned scarlet when she said this causing her to laugh a little to herself. Deciding to not wait up on the eldest, Mikan and Rito went ahead and ate dinner, along with saving some leftovers for their brother.

Come ten o'clock, the oldest Hyoudou sibling had still not returned from his date. Now Mikan was beginning to get worried. Her initial decision was to call his cell and ask where he was. However, the next thing she knew, the twelve year old felt extremely tired. Her eye lids would not stay open and her mind began to drift from the land of consciousness. The last thing she remembered before everything went dark was bright crimson hair.

She woke up the very next day at her usual time and strangely enough in her bed, all dressed in her sleeping wear and all tucked in for the night. However, what was more strange was that she thought that she was forgetting something; something really important, but she couldn't remember for the life of her. It had something to do with Issei and a date, but her memories were all fuzzy. Deciding that it was probably not important, the brown haired girl had gotten herself dressed and headed down stairs to prepare breakfast for the day.

Rito was the first of her brothers to come down to the table, which was strange seeing as Issei was normally the first one down between the two. Even more strange was that Rito was in the same situation as she was, a memory that was unattainable that should not have been forgotten. He chalked it up to not sleeping well.

When the oldest sibling finally came down, he looked like hell. His eyes were droopy with small bags hanging under them, his movements were more lethargic than usual, and he seemed so tired. Rito had then asked him why he looked terrible and Issei yawned before answering, saying that he had a dream that Yuuma had grew these black wings and tried to kill him during their date last night. AS they heard this, both Mikan and Rito simply looked in confusion at their before asking a single question together.

"Who is Yuuma?"

Apparently, this question was enough to snap him out of his daze, because Issei woke up immediately as he heard this. It was then his turn to look confused as he began telling him, or in his mind, reminding them about Yuuma and how he had a date with her last night. Of course, this did nothing as the name "Yuuma" did not pull up any faces or memories of their brother's "girlfriend". Issei tried to insist about the matter, but they told him that maybe he wasn't getting enough sleep.

Now, their brother was nothing if not persistent and during their entire walk to school he attempted to jog some kind of memory about the mystery girl for Rito. All this led to was Rito shaking his head sadly, denying the existence of the girl. The middle child also noticed that Issei was a bit slower and looked even more tired during their walk, but he chalked it up to him just being tired.

The next time the orange-brown haired boy saw his brother was after school with his two buddies. Issei had said that he was planning on going over to one of their houses and watching porn all evening and asked if he wanted to come with. Rito, being the obvious closet pervert and denier of all things perverted replied as he normally would.

He turned scarlet and ran away while shouting out his goodbye.

After running a good five minutes, Rito stopped to catch his breath and think on his action. Was it right for him to just ditch his brother like that? Sure he was going to be spending time with his friends, but he still looked depressed, even if he didn't want to show it. Maybe he should go back and try to talk to him.

However, luck was not on his side as he received a text from his father asking him if he could come by with some supplies. Sighing, Rito decided that he try to talk with his brother the next day, when everything has had a chance to settle down.

When returned home later that evening, Mikan had just finished making dinner and did not even ask about the whereabouts of Issei. Knowing their brother, he had already called ahead and informed his sister about what his plans for the evening where and that he would be home before midnight. So after the two finished eating and taking their baths, the siblings settled in for the night.

When Mikan woke up the next day, she began her normal routine. As she began making breakfast, Rito had arrived at the table and so she knew it would not be long before Issei showed up. However, after ten minutes had passed, Mikan had begun to get frustrated at the absence of her brother. So, deciding she was not going to wait any longer, the brown haired girl walked up the stairs calling out her brother's name and telling him it was time to get up. Said older brother replied that he would be down as soon as possible, but she was not satisfied. And so, without warning, Mikan reached her brother's door and opened it up, telling him to get up. She was expecting to see Issei lying face down on his bed, but instead…

"Good morning."

She saw that her brother was over a crimson haired girl that looked to be about his age. But that was not what stood out to her. No, what stood out was their current state of dress.

The two of them were as naked as the day they were born.

Now if this was some kind of anime or manga, Mikan, being the little sister, would accuse her brother of being a pervert and whacking him with a blunt object. This was the norm and the law of these situations.

"Sorry for disturbing you two."

However, that law meant jack to Mikan for two reasons: one, her brother was a pervert and she knew that already. The second was more of a matter of her knowing it was not her place to accuse Issei of something she knew he would never do. And if that girl and her brother did do what she believed they had done, the crimson haired girl did not look the least bit uncomfortable or even showed signs of struggling; so again, not her place to judge.

Closing the door and walking away from the shouts of protest from her brother, Mikan made her back downstairs only to see Rito at the bottom asking her what the problem was. She told him to go up and look himself before she made her way back into the kitchen and set out a fourth spot at the table. As she did this, the youngest child heard a shocked scream that came either from Issei or Rito, though she put her money on that it was Rito.

Apparently the girl's name was Rias Gremory. She is a third year student at Issei and Rito's school, and according to the two, she was a very popular girl being called one of the "Four Ladies of Kuoh". Though, why she was naked in Issei's bed along with said bed's owner being with her and equally naked was the elephant in the room.

Rias had tried to explain herself before Mikan stopped her.

"I don't know exactly why you were in my brother's bed or why you two were naked. But, it's not my place to judge. But, it becomes my problem when my brother gets hurt. So all I ask is that you don't do anything to cause him any harm."

While she was initially shocked at the younger girl's reply, Rias had simply smiled and promised Mikan that she would not let any harm come to Issei and she would not do any harm to him. Satisfied with her answer, the two then resumed eating while the males in the room were a bit too stunned to say anything. Issei, because he had just learned something that changed his entire life, and Rito, because he just saw his brother and another girl naked together.

After the four finished breakfast, the high schoolers proceeded to then head off to school. There was very little talk among the three as Rias merely walked ahead with a confidant smile and pace while the brothers were trying to process things, albeit different things. It got even more awkward when they had arrived at school and everybody's focus was centered right on the trio with most of the girl's saying numerous nasty things about Issei. One girl in particular was more than confused by what she was seeing, but she would confront the situation at a later time. Soon after entering the main building, the three had parted ways with Rias telling Issei that she would send someone for him. Deciding to make himself scarce, the younger brother began to head to his homeroom, the sounds of his brother being assaulted by his friends lessening as he walked away.

When the school bell had rung, Rito made his way to his brother's homeroom but stopped at what he saw: Yuuto Kiba, "Prince of Kuoh", absolute heart throb, and number one guy whether it was loved by girls or hated by guys, was leading his brother out of the classroom. Why would Issei, who has made it clear his disdain for the pretty boy, be walking with said pretty boy? Deciding that it was better to leave the situation alone and head home, Rito did just that.

When Issei had returned home, it was already dark outside. He was question (read: interrogated) by Mikan wondering just where he was this late at night. The brown haired pervert had nervously rubbed his head as he replied that he was in a club meeting and that it runs later in the day. When asked if said club involved a certain crimson haired girl, Issei merely chuckled nervously. Mikan could only sigh at this answer but said no more.

The next following days were rather normal for the family, but not like before. For one thing, Issei did not really smile all that much. Oh, there was a smile on his face, but it wasn't his normal, optimistic smile that lit up the room when he walked in; it looked to be more of a sad smile and something was eating away at him. Both Mikan and Rito wanted to confront Issei on this matter, but chose not to, deciding it was better to wait and see if things got better before stepping in.

Then, almost three days after the "naked day incident, Issei skipped school. He simply told Mikan that he needed a day to himself so he could clear something up in his head. Knowing her brother, she merely said that she knew nothing of his current whereabouts. The pervert could only smile and hug his sister tightly before leaving the house, an hour after Rito left.

By the time the two had gone to sleep, Issei had returned home, battered, bruised, but knowing that he had ended a nightmare.

Two weeks after first meeting Rias, the red haired girl had arrived one day along with their brother (who had just been training with Rias) and a girl neither sibling had ever met nor seen before. She bore long blonde hair, bright green eyes, and possessed the aura of a small bunny

Her name is Asia Argento and she was a transfer student that was not only attending Kuoh Academy, but was also in the same class as Issei. Apparently Rias was trying to help set up a permanent place to stay as she had no family and no real place to stay. According to the incredibly gifted girl, Asia had asked if she could live with Issei.

"I have no problem providing money for Asia's stay here."

"I have no real problem with her staying, I just have one question for her."

"Huh? M-me?"

"Yeah, you go to my brother's school, so you do know about what people say about him and you have seen his actions. Tell me something, what do you think of Issei?"

"Ise-san is…a very kind person. He helped me when I first arrived here and has done nothing but continue to help me even when I didn't deserve it. He risked his life so much for my sake. He is my first friend and someone I care about a lot."

As the two siblings listened to the blonde's speech about their brother, they couldn't help but grow a smile on their faces. Meanwhile Issei, who was sitting next to Asia, was crying tears of joy upon hearing such kind words said about him.

"You can also think of this as having an older sister."

Mikan immediately turned her attention to Rias when the crimson hair girl said this. Said girl smiled a businessman like smile as she continued, "Since Asia is still new to Japan you could teach her what you know as well as getting to know each other in a sisterly way."

The prospect of having an older sister, or even a female role model did sound appealing to Mikan. Now mind you, the young girl loves her older brothers, she wouldn't trade the world for them. But, having another female in the house would be nice…

"As I said, I have no problem with her living with us. We've got the space. Rito, what do you think?"

"Me? I'm fine with it as long everyone else is."

"Well then, welcome to our home Asia."

"R-really?! Thank you very much!"

The next few days consisted of trying to get Asia accustomed to the new household. Their home thankfully had enough rooms, so getting Asia set up was no problem. Rito had no problems with the blonde as she was extremely kind and benevolent. Mikan loved her to say the least. Having someone in the kitchen to help out, who was not her older brother, was nice as she was able to converse with Asia with things she would normally not talk with to her brothers. It was also adorable to see how much of a housewife Asia played for Issei. Both siblings could tell that the blonde loved Issei, but just lacked the boldness and confidence to act upon those feelings.

Speaking of Issei, there was an incident that happened a while after the blonde moved in. Mikan was busy putting away dinner when she heard a crash and feminine scream come from the bathroom. Thinking Asia had slipped and fell onto the floor, the brown haired girl had put everything down and ran as fast as she could to the bathroom. When she arrived, Mikan had thrown the bathroom door open to see-

Issei lying on the floor with Asia on top of him with one of his hands groping her. Naked. With some strange white substance and blood all over the floor.

Looking at the two for a minute, the brown haired girl had closed the door as she said, "Sorry for interrupting, but please do it somewhere safer."

What followed was a long winded explanation about how Issei freaked out when he saw Asia naked and Murphy's Law kicked in.

Then, four days after Asia moved in, both Issei and her had left with their club to go on some kind of excursion for ten days. The eldest of the house was worrying about them till the minute they left. The two were given goodbyes and a hug, along with a warning not to do anything deviant while away (much to poor Asia's embarrassment). While the two were by themselves, it was not difficult to maintain their lives. In fact perhaps it was easier. But it was lonely without their eccentric brother going on one of tangents about breasts and the kind and gentle smile that Asia bore for everyone. Needless to say, the ten days they were alone were difficult mentally.

When the two had returned, Issei had a determined look in his eye. It was like he was getting ready for the fight of his life. Rito had asked him what he was getting pumped for and all he got was a simple reply.

"I'm going to grill me some Yakitori!"

Why he was getting excited to cook chicken, Mikan and Rito would never know.

Later that night, Issei and Asia had left saying that they needed to go to a club meeting and that they would be back soon.

It was nearly two hours later when they returned and by that time both younger siblings were asleep. Though, perhaps that was best. Rias had no idea what their reaction would be to seeing their older brother bruised, burned, and unconscious. Thank Maou for Asia's Twilight Healing.

Neither Rito nor Mikan saw Issei for the next two days. Rias had used her hypnosis to make them believe that Issei was training very early and very late that they never saw him. She of course hated to do this, but how could she explain what had happened to Issei? She had made a promise that had been broken and she felt nothing but guilt and shame on top of the guilt of letting Issei get this hurt for her sake.

When Issei had finally woken up, the first two people he saw were Asia and Mikan. Mikan was upset that her brother was out so late and so early and did not even want to see his own siblings. While confused at first, Issei had reassured Mikan everything was alright and that he would be training at different times now. He had then all but pushed her out of his room so he could speak to Asia alone. Deciding to give the two privacy, the brown haired girl walked downstairs and sat on the living room couch, waiting for her brother to finish.

Not even ten minutes later, Issei walked out of the house saying that he would be back. His tone held little room for argument and his face was hard as steel and his eyes blazed with an intense inferno. Overall, the pervert looked determined to right some kind of wrong.

"…please be safe."

Issei had returned home, his uniform looking a little burnt and his face sporting a couple of bruises, but he held a smile on his face, one that looked like a combination of embarrassment and joy. When both siblings asked what happened, Issei looked at them before giggling a little to himself. The two simply looked at each other before shrugging and believing this was just Issei being…Issei.

The very next day however…

"And with that said, I will be living here as well. Please treat me well Mikan-chan, Rito-kun."

That's why Issei was so giddy. And with that said, Rias had moved into the Hyoudou home, Mikan received a new older sister, Asia got a little jealous, Rito was confused about the whole situation, and Issei got to take a bath with two girls…kind of.

Ever since Rias Gremory first appeared on Issei's bed, the Hyoudou's life had gone from normal to abnormal. From naked girls with their older brother to big sisters, their everyday normal lives were long gone.

And Mikan had a feeling that this was just the beginning.

Yes, I know I shouldn't be doing another story when I've got like five others to do, but I couldn't help it. Anyway, this one has been a long time coming in its own way. This idea goes all the way back to 2015 and was restarted in early 2017. In anycase, Issei, Rito, and Mikan are siblings and they are going to go through some crazy things. So anyway, hope you enjoy this and updates will come soon. I will see you all later.