This is just a story that I had thought up of on the spur of the moment. This is my first fanfiction, just to warn you. My writing and summaries aren't great but I hope this little story helps give you a laugh. The characters may seem a bit different, so you'll have to forgive me. Read, review, and enjoy. I do not own High School DxD or any of its material and characters. High School DxD is written and owned by Ichie Ishibumi. I'm not exactly sure what is safe for rated T so let me know if this story crosses the line.

Bold words – Draig Talking Out Loud

Bold Italics – Draig Thinking

Italics – Issei thinking

A Change in Character

Chapter 1: The Girls Are Acting Differently

Today was just a normal day, no training, no disastrous events, no doomsday going down, just a regular school day. It was a Friday too, so weekends were off.

Issei was walking to the club room to meet up with everyone else from the Occult Research Club, or ORC. It was just a regular afterschool meeting, but today, was not going to be such a thing. Issei wasn't aware of this, however.

Knocking on the door, Issei put his hand on the door handle, until suddenly, Draig spoke to him.

"You should be careful, Partner. I have a bad feeling about what's behind the door. I don't sense any particular danger of a fight, but just be cautious."

"Got it, Draig." Issei put his guard up but avoided summoning the Boosted Gear, unless necessary.

Issei carefully opened the door to see, Rias, Akeno, Xenovia, Koneko, Asia, Ravel, Rossweisse, and Irina, all sitting on the couches and chairs in the room. They all looked a little dazed and…different.

"Hey, Draig, don't they…seem a little odd to you?"

"I don't exactly know what's going on, but they have a faint energy signature on them. It looks like they've been mentally or spiritually effected. Be careful." Draig warned him with a cautious tone.

Issei felt a sense of protectiveness spark in him.

"Hey! Are you all alright?" He called out.

This snapped all of the women out of their trounces as they looked at him in alarm at his sudden call.

"We're fine, Issei." Rias dismissed his worries with a smile.

The others gave him smiles as well, which were unusually brighter than normal.

Seeing his girlfriend and master give him a reassuring smile, Issei relaxed as he sat down at an empty spot on one of the sofas. Koneko, immediately moved to sit on his lap, as usual, and began to eat some of the snacks that she had brought with her. She held up some mochi for him to eat, and gave him a sincere and warm look.

"Senpai, please have some." She spoke in her usual voice. She had a strong blush on her face and she seemed exceptionally more affectionate than usual. The action seemed small, but it was quite moving, nonetheless.

Issei took a bite of the green-tea mochi and continued about his usual mood.

"So what's the meeting about today?" Issei looked up at Rias.

Rias seemed to be entranced at his gaze and a blush crept across her face but she shook it off as she realized herself fall into a daydream.

Her face returned to being serious as she relayed to him why they were here.

"Duke Gremory has told us about a Stray Devil that's in the area. He wants us to eliminate it." Akeno spoke out, but her eyes were strictly fixated on Issei, her gaze unwavering and loving.

Issei felt that it was too dangerous for him to be in the room, for he felt the gazes of all of the women fall on him.

Shaking off his worries, he tried to shake the attention off of him. He loved having these beauties around him, but he felt that something unnatural was going on.

"Where's Kiba and Gasper?" Issei noticed that his brothers-in-arms, wasn't present.

"He's busy right now. It seems that he's taking care of Tosca. I thought it best that he got to spend time with her and catch up. Gasper's doing the same with Valerie.

"I see." Issei smiled in relaxation. The two other guys in the club finally got to meet beloved people from their past again. The two needed a break to play catch-up anyways.

Akeno's gaze felt considerably more jealous, but her jealous aura quickly receded as she regained composure.

Issei caught this and felt intimidation rise in him.

Issei felt two large and soft objects touch the back of his head and turned around to see Rossweisse clinging to him, with a strong affectionate emotion in her eyes.

"Rossweisse-sensei, what's wrong?" Issei asked nervously.

"Nothing at all, Issei-kun." She replied sweetly. The usually uptight Rossweisse, looked like a love-struck girl who had just found the love of her life.

Issei felt that this weekend, and maybe even next week, he'd be in for something huge.

That night, the ORC had tracked the Stray Devil to a warehouse. Walking into the warehouse, everything seemed normal until everyone felt a bloodlust arise from the shadows.

A creature popped out from the darkness of the Warehouse. The Stray Devil was a low-class devil but it had gained quite a bit of power from consuming several victims. It no longer looked humanoid and was just a black spiky creature that had a red visor. It growled and roared as it showed its gnashing black teeth. Its frame was large but stealthy and it had blades for hands.

"Everyone, can you leave this to me?" Issei requested with earnest emotion.

"Why?" The women called out with concern.

"I want to use real battle experience for my training. When I saw Vali use his [Empireo Juggernaut Drive] I felt that he made another large gap in strength against me. I need to train more, and what better way to do that, than to use real battle as training." Issei's reasoning was valid, and reluctantly, the girls stepped aside.

"Let's do this." Issei said as he summoned his Boosted Gear.

"BOOST!" The red gauntlet called out as it began to work its power-up function.

"Balance Break!" Issei called out as his Scalemail enveloped him in red dragon armor.

Normally, Issei wouldn't really use Balance Break for fighting a low-class devil now, but his training with the elder Sun Wukong, made him feel like putting battle-experience into his training.

The last time he trained, he had to hit a clone of Sun Wukong multiple times with exactly the same amount of power. He boosted his power to a level that he felt that was 5 and punched the Stray Devil, knocking the air put of it as his punch connected with its chest, sending it hurling into the air.

"BOOST!" The gauntlet called out as Issei leapt into the air.

He punched into the Stray Devil again and this time, the power felt exactly the same as the first punch. A sign of improvement.

Issei boosted one more time and fired a [Dragon Shot] that obliterated the Stray Devil.

With the job done, Issei dispelled his armor and looked at his left arm.

"Still got a long way to go. I still need to get stronger." Issei vowed as he and the other ORC members went home.

The problem with the women's change of personality became more apparent when everyone had gotten home.

Rossweisse had immediately jumped to see if he was alright.

"Issei-kun, are you alright? Are you hurt or tired?" She asked with worry lacing her words.

She wasn't acting like usual, yes she was very kind and she had acted more affectionate with him after the incident with Euclid, but she was still restrained and uptight.

"I'm fine, Rossweisse-san." He raised his arms and moved around in a normal fashion to prove his point.

She breathed a sigh of relief as she hugged Issei tightly.

"I'm so glad you're not hurt. I was so worried that you'd push yourself too hard and it made me so worried that something bad would happen. Thank goodness." She whispered to him as Issei felt her chest push up against him.

"Ah, this is bliss. Her chest is so big. I love it!" Issei commented mentally as he savored the moment.

Akeno's aura began to crackle and flare as she glared at Rossweisse, but she calmed herself down again as she tried to control herself.

Rossweisse's face inched closer to Issei's as she was about to kiss him, Akeno appeared from nowhere and blasted a blast of thunder between.

"Ara ara. Ufufufu. Looks like Rossweisse-sensei needs to be taught a lesson." She chuckled darkly as she began to feel anger boil in her.

"Wha!" Issei exclaimed as he and Rossweisse jumped out of the way from her thunder magic.

"What's with Akeno-san? She's acting so differently!" Issei wondered what the real source of the change was.

Akeno proceeded to fire several bolts of thunder magic at Rossweisse, who shielded herself with magic circles.

The two flew in a dance of magic in the air, as chaos began to grow.

The answer to Issei's question soon arrived as Azazel appeared in the room through a magic circle.

"Looks like it was you all." Azazel mused as he rubbed his temple with an amused look.

"Sensei! What's going on?" Issei looked to him for guidance and answers, while chaos erupted with Akeno attacking Rossweisse with thunder, while Rossweisse defended herself with barriers made of magic circles.

Azazel looked at the two women who were engaged in warfare and proceeded to calm the situation down first.

"The both of you, stop it right now!" He yelled with a calm and leader-like tone.

Recognizing his voice, Akeno and Rossweisse relented and calmed down. The two of them had then apologized to each other for their behavior and then went their separate ways.

"Sensei, what's going on?" Issei asked, exasperated.

"I had made an invention on the spur of the moment called the Personality Ray. It takes some dormant parts of a person's personality or even twists a person's personality, and changes a target's behavior. For example, if I shot you with the ray gun, you'd be a normal and upright guy, a contrast to your current self. I accidentally left it in the clubroom when I left and it looks like the girls must've been hit with the ray when it went off. I found that the remains of the ray in the Clubroom. I guess it wasn't stable and it exploded, hitting all of the girls in the room at the time. I don't know what kind of personality each girl has at this point but I'll be doing some studies on it to try and find a solution. We can't have this chaos go on, not with Rizevim already causing trouble. Until then, bear with their behavior.

Issei sighed as he feared what might happen if this happened again.

Issei went to sleep that night and felt that Asia and Rias weren't sleeping with him. An odd and unsettling discovery.

Instead, he found Akeno, in his bed, alone with him.

She was sleeping soundly against his chest and was completely naked!

"These two soft mounds touching against me, they must be Akeno's soft boobs! I can't get enough of this! This is the best! But why is Akeno-san the only one here?"

Akeno stirred awake as she looked up at Issei and giggled.

"Ufufufufu. Issei-kun, you're all mine now." She said in a state of euphoria.

"Akeno-san, where'd everybody else go?" Issei asked with concern.

"They all decided to sleep in their rooms, so I took the chance to sneak in here instead. Now we can be together forever and ever and nobody will come between us. I'll make sure, that the two of us live happily together, my beloved Issei-kun." She spoke with a blushing face and lustful tone.

In truth, Akeno had put up a powerful magic barrier around the room so that nobody but a Maou-level person could get through. Strangely, this wasn't something she had ever shown being capable of doing in the open.

"Akeno-san, are you alright?" Issei asked with concern.

Akeno replied with a sweet and gentle tone.

"Yes. I feel perfectly happy and content with you. I couldn't be happier. I've always fantasized about waking up like this you. I want to be like this with you every morning and I also want to wake up like this with you in the future with children. Wouldn't that be perfect, darling?"

"So, why did all of the other girls sleep in their own rooms. Where's Rias-buchou and Asia?" Issei asked absentmindedly. Issei had become accustomed to sleeping next to Rias and Asia, and even all of the other girls in one bed.

Akeno immediately began to get angry at the mere mention of other women.

She looked down with her bangs covering her eyes and she spoke in a hushed and restrained voice.

"Why do you keep mentioning other girls? Are you having sexual affairs with them? Are you leaving me behind? I know that I talked about wanting to have an affair but it's different now. I want to be the only one that you look at from now on. I want to be the only woman in your life. I won't let them have you. You're mine. Mine. Mine. Mine. Issei-kun belongs to me. I can't stand it. Why won't you accept my feelings?! I'll make sure to get rid of the other women, then I'll be the only one in your life. You'll love me only! Ufufufufufufufufu!" Akeno began to rant in anger, jealousy and desperation as Issei felt her embrace him. She began to pull him to her as she tightened the hold. She looked up and Issei looked into her eyes. They were blank and lifeless, devoid of all happiness and were left disturbing and intimidating.

Issei recalled watching an anime where there was a yandere girl who was behaving exactly like her and when the guy that was dating her, broke up with her, she killed him.

"SHE'S A YANDERE!" Issei exclaimed in his mind while freaking out.

Deciding to rationalize in order to survive, Issei patted her head and kissed her forehead.

"Akeno, don't worry. I love you too." In truth, Issei did hold romantic feelings of love for her, but he just hadn't said it out loud yet.

This seemed to calm Akeno down as her grip loosesned. Her eyes returned to normal, with happiness and vigor returning.

She closed her eyes happily with a smile and cuddled up to Issei, who breathed a sigh of relief.

"Looks like you dodged a bullet, Partner. I once had a host who had a harem of yanderes. It. Was. Terrifying. Who knew that human women could be so scary? Anyways, good job handling that one. All that's left is for Azazel to report back on his findings tomorrow."

"I wonder if I'll survive that long."

Issei decided that he would have to steel himself for what was to come.

The next morning, Issei met up with Azazel, who had come up with a new invention.

"I did some more research and it looks like the personality change has to develop according to the person's interactions. It'll take a couple of days for the effects to wear off so you'll have to bear with it." Azazel smirked at Issei's distress.

After Issei told Azazel what happened with Akeno the previous night, Azazel's face paled.

"Yep, yanderes are the worst to deal with. Her personality change must've developed after watching you interact so closely with the other girls. Thankfully, Akeno isn't a naturally murderous person. She maybe a sadist, but she won't be crossing over to a full yandere so no worries. The personality changes will fluctuate though, so the girls will act like usual sometimes and their other personalities will take over at other times." Azazel's research brought relief to Issei but it also made him worried too. Suddenly Akeno appeared from the kitchen doorway.

"Issei-kun, breakfast is ready." She smiled sweetly before returning to the kitchen to bring the food out.

"I'll be leaving now. See ya." On that note, Azazel left through a magic circle.

Sitting at the breakfast table with Akeno and the other girls, Issei felt that his premonition about this being a big thing, had come true.

What'd you think? Good? Bad? Terrible? Make sure to leave reviews and comments if you feel like it and I'll see you next time.