[I will never give up.]

Serafall is battling what looks like the Hydra that Vali defeated in the Underworld during Hades' attack. Serafall appears to be on the losing end as she lies down on a large crater presumably made by the colossal monster.

[Dragon Kicccccccck!]

What appears to be Issei in his Scale Mail flew forward at high speed and kicked the Hydra with full force, knocking the monster off its feet as it roars in pain. The Hydra manages to get up, but the two were not discouraged.

[The Hydra who brings destruction to the Underworld! "Magical girl" Levia-tan and Oppai Dragon will destroy you!]

[Yes, but for both of us to win I need the power of the Switch-princess!]

[I am here Oppai Dragon! Defeat this foul creature with what I can offer!]

[Yes!]

Oppai Dragon then touches Switch-princess's breast, causing his armor to glow.

[Levia-tan! Let's do this together!]

[Yes and with Oppai Dragon's power restored, there is no way we will lose!]

Both Oppai Dragon and Levia-tan then charged at the Hydra, who is apparently about to release an energy blast.

[Levia-beam!]

[Dragon Kicccccccck!]

Both attacks hit the Hydra on the main body before it can release its attack, apparently killing it as the monster's body begins to disappear.

[We did it Oppai Dragon!]

[We sure did Levia-tan!]

Oppai Dragon and Levia-tan begins to celebrate as credits start to show up in front of them.

[With Oppai Dragon and Magical Levia-tan joining forces, the Hydra was defeated and the Underworld was saved once again.]

After the narrator finishes his message, the credits begin moving farther away until we can see the outline of the flat screen TV airing the show. Issei, Serafall, and everyone else is present watching the show in the huge living room of the Hyoudou Residence. After Hades' attack was repelled, the director of Miracle Levia-tan found inspiration within Issei and Serafall and made another crossover featuring the children's' beloved heroes of the Underworld.

"According to Director-san, this TV movie was very well-received in the Underworld, getting more views than the last crossover when we battled that strong dragon." Serafall explained to them.

"We just got back from saving the Underworld yet again and yet the director had the audacity to use us for his work yet again. At least give me a break! I don't want the children to call me Oppai Dragon yet! I just got over being called that!" Issei complains in his thoughts.

[Just great! I was just starting to get my reputation back as the Red Dragon Emperor due to the fight with Hades and then this has to come out! Please don't make me go back to being the Chichiryuutei!]

Ddraig's reaction was even worse than Issei's due to the fact that he cries upon hearing the word breast.

[Uooooooon! Oh great, my tears are falling and they won't stop! Where is my medicine? Where is the counselor?]

Ddraig starts crying uncontrollably to the point where everyone can hear.

"Please don't cry Ddraig. I also want to cry because I don't get a break from this even after I just helped save the Underworld!" Issei told Ddraig in his thoughts.

"Is Ddraig really that depressed over the fact that he is known as Oppai Dragon?" Serafall asked Issei.

"Yeah. He was just about to get his reputation back as a powerful Heavenly Dragon, but due to these shows, his nickname is reverted back to Oppai Dragon. I better get his medicine."

Issei sprinkles the medicine on to the jewel of the Boosted Gear, much to Ddraig's relief.

[…Thanks a lot…I was about to lose it back there.]

Ddraig takes a deep breath and finally calms down. Koneko, who is sitting on Issei's lap, starts feeling pity for Ddraig.

"If only Ise-senpai would be just a little less perverted then Ddraig wouldn't have to go through this, but this is the Ise-senpai we all know and love."

"I don't whether I should be happy or regretful." Issei said to himself.

"Indeed. I will be sad if Ise isn't the person we all know."

"I like Ise-san the way he is."

"If Ise-kun doesn't have that side of himself then it will be hard for me to give him service."

"Agreed."

"As his childhood friend, I will support Ise-kun for who he is."

Rias, Asia, Akeno, Xenovia, and Irina soon joined in.

"Usually I am against this, but since everyone prefers this Ise-kun, I will also give my support."

"I will also. I don't want Ise-sama to change from the man I admire and look up to."

"…Ise is my first friend…I prefer him this way."

"He is also my first friend so I agree as well."

Rossweisse, Ravel, Ophis, and Sylphi also added themselves in.

"Congratulations Ise-kun for getting popular just by being perverted." Kiba joked.

"Shut up Kiba!" Issei yelled.

"But still. If this is the side of me they prefer then it looks like this is what I have to remain as. Sorry Ddraig. It looks like you are going to have to endure being the Chichiryuutei for the time being." Issei said to himself.

As they relax, a magical circle appears and from the looks of the symbol, someone from the Sitri clan is casting it. Sona appears from the circle, but for some reason, her face is completely red along with her eyes full of tears as she directs her gaze towards her older sister.

"ONEE-SAMA!" Sona screamed as if she was mad.

"Ah Sona-chan! I am so happy that you decided to come!"

"Did you tell our parents that I am in love with Ise-kun?"

Everybody immediately pays attention to what Sona just said.

"Of course. After all, Ophis-chan already told us about your promise to be Ise-kun's next wife. It's better for our parents to find out sooner so I told them. They were very happy since they admire Ise-kun as much as we do."

"For real? I feel honored, but for the Sitri Clan to think of me this way feels a bit too grand for me." Issei again said in his thoughts.

"For Onee-sama to do this. It is because of you that Azazel-sensei plans to add me to that Oppai Dragon show. I will never be able to walk in the Underworld again without children noticing me." Sona starts trembling.

"I don't even want to think of the name he will give my character."

"A lot of children like Oppai Dragon after all so it should be a good thing." Serafall smiled.

"I don't want to be in a show as embarrassing as this! I can't take it anymore!" Sona begins running away from Serafall.

"Wait Sona-chan! I was just doing this for you!" Serafall gives a chase.

With the Sitri sisters gone, Buchou turns her attention back on Issei. "I hope you don't plan on doing anything just because of what Serafall-sama did."

"Yes Buchou." Issei nervously replied back.

The next day…

CHU.

Serafall kissed Issei in the cheek just as he was about to get up. "Sera? Where is Buchou and Asia?"

"They went down to make breakfast so I decided to give you a good morning kiss as your girlfriend."

"That is certainly the way I prefer to be woken up."

"Then every morning I will give you many kisses until you wake up, okay?"

"That might be a bit too much since Buchou and Asia sleep with me everyday."

"Then I will sleep with you from now on every night naked as well. Nothing is stopping them from doing the same so I won't stop either."

Issei suddenly had a nosebleed because of what Serafall just said.

"Hehehe. By the way, the Sitri household is inviting you for dinner. They want to get to know you. Do you want to come?"

"To meet your parents? I would love to meet them, but I am nervous at the same time."

"You don't have to be since my whole family admires you. They just expect you to be kind and polite."

"Yes. I will make sure to act this way when I meet them."

"Great. I better tell everyone since they are expecting them too." Serafall leaves the room, leaving Issei feeling anxious.

A few hours later…

"Let's head to the train!" Serafall immediately jumped into one of the train using the same station that Rias used to get to the Underworld. This time, the Sitri Clan owns the train they are using.

Although the rank of the Sitri Clan is one level below that of the Gremory, their lifestyle still doesn't lose out to other Devil families of higher levels. With everybody seated, the train takes off.

Within an hour, a large castle was sighted on top of a small hill, about the same size as one of the Gremory Residences.

"It sure doesn't lose to Buchou's home." Issei said as he stares in the castle in amazement.

"Of course. The Gremory and the Sitri Clans have been friends for quite some time since the two are part of the 34 remaining Devil Clans of the 72 Pillars. The fact that Sona-chan and Rias-chan are childhood friends also helped with our rank and that should be obvious Ise-kun." Serafall explained.

"Sorry, but no matter how many times I take a look at the castle this size, I never get used to it."

"That's fine since you live in Japan all of your life. I prefer the life in your house though since I have more freedom there."

When they reached the closest Sitri castle, Serafall is immediately greeted by her servants before they turn to greet the other guests. In front of the entrance stood a black-haired man in a business suit who looks like he is in his twenties and a woman who looks equally as young, wearing a white dress and having long silky black hair.

"Mother! Father! Levia-tan has return!" Serafall immediately runs to her parents and immediately gave them a big hug, which they returned back.

"So nice to see our daughter again."

"I agree. It's been quite a long time."

The parent's said in a cheerful tone. They act just as cheerful as the people in the Gremory Clan. They then turn their attention to the guests.

"You must be our expected guests. Welcome to the Sitri household." Serafall's father politely greets them.

"It's good to see you again Lord Sitri." Rias said.

"Rias, you have grown very well. I am also glad to see you. It has been a long time. I see that you gain new members as well."

"So glad to finally see my eldest daughter again since she is always busy as a Maou and I have seen that you and Rias made some new friends." Serafall's mother is also happy to see them.

"Yes Mother. By the way, you know that boy standing in the middle? That is the Sekiryuutei, Hyoudou Issei. He is my boyfriend." Serafall pointed at Issei while talking to her mother.

"Ah yes. I've heard that you are in a relationship with the Sekiryuutei. It looks like the future of the Sitri Clan is a bright one after all."

Lord Sitri then approaches Issei. "So you are the one who is able to win the hearts of both of my daughters. From now on you can call me father."

"WHAT?" Issei becomes shocked.

"Mou! Ise-kun barely knows you father! Don't asked him to do things before getting to know him as well." Serafall's cheeks became red.

"Even Sera gets embarrassed by her parents. That look on her face is so cute!" Issei rambles in his thoughts yet again.

"Dear, let's go into the house so our new guests can introduce themselves."

"Right. All of your rooms have been prepared so let's come in and get to know each other." Lord Sitri then invites the guests into the house.

"Sona! You have guests in the house. Please be sure to greet them." Her mother called out.

"Yes Okaa-sama." Sona comes out and just as she was about to greet them, she freezes for a while after realizing that her guests are actually the people of the Hyoudou Residence.

"W-what are all of you doing here?"

"Mother and father wanted to meet Ise-kun after finding out that I am in a relationship with him and even more so after telling them you love him. Knowing that you would stop me, I secretly made a deal with mother and father to invite Ise-kun and everyone else so they could get to know him especially."

"Geez Onee-sama, why are you always doing things like this?" As Sona complains, her mother does not like what she sees and approaches her.

"Sona! I told you to greet our guests so I expect you to be more polite towards them! You had already made us a laughing stock with your selfish dream! Even though we accept it, we will not tolerate selfishness that can affect our clan! You already have the freedom that most High-Class Devils don't have! Understand?"

"Yes Okaa-sama…" Sona answered back out of fear.

"Seriously, with the amount of freedom you have, you need to loosen up not just on the people around you, but yourself as well."

"Ise-kun is okay to call you, right? When do you plan on marrying both of my daughters?"

"Dear, you are rushing it again."

"It is because of you two I am like this!" Sona complains after her face turns red.

With the approval of Sona and Serafall's parents, the other girls intensively stared at Issei, not liking the fact that he now has more potential wives.

"Buchou, are Sona-kaichou and Sera's parents like yours? They are awfully a lot like them."

"They are usually not as easy-going as we are, but when it comes to towards people they like and those around them, they show just as much affection. Sona used to be like this, but as the Student Council President, she had to maintain a strict persona."

"I see. Maybe that is why Sera acts like this as well in the public."

It wasn't long before Sona's peerage also shows up, who were also shocked over their sudden visit with Saji still acting envious towards Issei due to the family's approval for Issei to take both Sona and Serafall as part of his collection of wives. After the introduction is done, the servants then lead the guests to their rooms so they can settle before dinner.

"No matter how many times I tried to settle, I can never get used to a big room like this." Xenovia comments as she unpacks.

"That is why we are here." Irina said with Asia next to her.

"Oh look, the self-proclaiming Angel has arrived."

Irina reacts immediately after hearing that. "What? That is not what I wanted to hear from the self-proclaiming swordswoman!"

Both Irina and Xenovia intensively stared face to face.

"Both of you please don't fight!" Asia tries to calm the two girls.

By the time dinner is ready, Sona and Issei are the only ones feeling uncomfortable of their situation as high expectations are placed upon them.

"So Ise-kun, your goals for the future is to become the Harem King by becoming a High-Class Devil with your own peerage, correct?" The mother asked.

"Correct. I want to become and independent Devil while still serving as Buchou's servant. My goal right now is to become the Ultimate Pawn."

"Such respectable dreams you have Ise-kun. With your mannerisms and intelligence taught to you by the Gremory Clan, that future won't be too far ahead. By the way, if you are going to become the Harem King, do you plan on including the girls around you?" The father asked.

"Yes. I am the closest to them after all and I promised to take care and protect them once I reach that goal."

The faces of some of the girls turned red after hearing Issei's promise to protect and take care of them.

"I don't doubt it. I am sure Ise-kun will make a great husband, especially towards our Sona and Serafall. All of the girls under your care will probably be much happier with you than who we would set them up with." The mother adds.

"Please change the topic." Sona requested out of embarrassment.

"Come on Sona. Serafall told me how much you like Ise-kun. Falling in love is not something you should feel embarrassed about." The father tries to cheer Sona up to no avail.

"That is not it."

Hearing them also made Issei feel embarrassed as the parents already claimed that he would be Serafall and Sona's husband.

"Let's plan out the wedding reception for our daughters." The father immediately announces his plan.

"Please stop rushing father! Can you just wait until everyone grows up a little more?" This time it is Serafall's face that turns red.

"I don't want to hear anymore of this!" Sona, unable to bear with her parents any longer, runs away.

"Kaichou!" Both Issei and Saji are about to chase after Sona, but Rias stops the latter.

"Buchou? Why are you stopping me?" Saji complains.

"You may be in love with Sona, but only Ise is the one who can help her right now even though I hate to admit it."

"WHAT?" Saji is dismayed over what he just heard.

"Sorry Saji-chan, but as her sister, I think I understand how Sona is feeling right now. It really feels like Ise-kun is the only one who can cheer her up." Serafall agrees with Rias.

Issei followed Sona all the way to her room while calling her. Seeing that the door is open, Issei enters to find Sona lying face down on her bed with her head on the pillow.

"I guess having parents like this is too much to bare sometimes, right? Don't worry; you are not the only person who gets embarrassed by his or her parents. My parents are also sometimes like this when they state my desires in front of everyone and showing my baby pictures to my friends without my consent."

Sona is still not responding.

"One thing we can all be happy about is that we all got along despite how they were acting in front of you. I am sure that you can agree to that at least."

"…Yes." Sona finally responded.

"I am also sure that they are acting like this because they are also concerned about you. After all, you often kept yourself too busy to the point where you spend little time with them. They probably want you to keep in contact with them a little more."

"…I know. I would like to spend more times with my friends and family, but I want to make ends meet."

"That doesn't mean that you should neglect your time with them. After all, they are your family."

"Yes. I am trying to work things out so I can remain in contact with everyone I know and love, but this is not the reason why I ran away from them."

"What do you mean?"

Sona finally sat up. "Even though Okaa-sama and Otou-sama are right about my feelings, I wish they would respect my feelings since they are personal. It's just so embarrassing since they have the tendency to blurt it out."

"I know how you feel after meeting Buchou's parents. I guess embarrassing their kids is their job." Issei laughs a little.

"Ise-kun, do you mind if I ask you something?"

"What is it?"

"What do you think of the me?"

"I think that you are a kind friend who cares about others just as much as I do. For example, you only think of Saji as a little brother and refused to get closer to him, because a couple of your servants are in love with him. You also held back during the first Underworld crisis in order to protect the kids who are being used as hostages despite the fact that you got injured as a result. I never disliked the kind and caring side that Kaichou has shown."

"Then what do you think of us being together?"

"Well, I am not against it. To be honest, I think a lot of guys would be lucky to have you as a wife. I would be as well, but I want to respect your feelings first."

Sona, touched by Issei's opinion of her, gave him a cute smile. "I feel much better now. Thank you Ise-kun."

"I am glad. We better get back to the dinner table since your parents are probably worried by now." As Issei gets up, Sona grabs him by the sleeve.

"Kaichou?" Issei becomes nervous.

"Please call me by my name from now on. We are friends, right?"

Issei becomes hesitant, but after remembering what Sona has been through, he submits to her request.

"I understand, Sona."

"I finally understood fully what Rias see in you. There is also something I wanted to tell you for such a long time."

Sona puts both of her hands on Issei's face. "I have always wanted to tell you that I love you too Ise-kun."

"Sona…"

Both Sona and Issei unconsciously move their face closer to each other until their lips finally met.

"It happened! The kiss between Ise-kun and Sona-chan finally happened!"

"WHAT?" Both Sona and Issei turn around to see Serafall standing in front of the door with the parents and people of the Hyoudou Residence and Sona's peerage watching. Everyone is surprised by the kiss they just witnessed.

"Alas, the future of the Sitri Clan got even brighter." Sona's father starts crying tears of joy.

"It's okay Dear. Calm down." Sona's mother comforts her husband,

"No way…so it is true." Rias is trembling with teary eyes.

"Ufufu. It looks like in addition to Serafall-sama, Ise-kun also added Sona as his wife." Akeno added.

"Hau! How many more wives will Ise-san get before reaching his goal?" Asia also has teary eyes.

"Good job Hyoudou!"

"Finally! Hyoudou-senpai made Kaichou fall for him!"

Momo and Ruruko are in joy since Saji probably can't go after Sona anymore, giving them more of a chance to be together with him.

"HYOUDOU!" Saji charged at Issei while shedding tears, but was knocked out by Tsubaki. "I can't let you interfere with Kaichou's love life."

Tsubaki then turns her attention to the highly embarrassed Sona and Issei. "Congratulations you two."

"Not you too!" Sona yelled in a cute tone.

Serafall then jumps in and gives Issei a kiss on the lips while hugging him.

"Onee-sama!"

"It looks like I have nothing more to worry about it. Ise-kun, promise me that you will take good care of both of us, okay?"

"Hey, Sera!"

"Mou! Don't leave me out!" Rias yelled as she prepares to jump in.

"Good luck Ise-kun." Kiba said as he watches Issei struggling with Sona, Rias, and his girlfriend Serafall.

[Oppai Dragon, if you want to win, then you are going to have to use the enemy's power against them!]

Sona's character finally shows up in the next episode of Oppai Dragon.

This is the true ending of Oppai Dragon vs. Miracle Levia-tan. Thank you for all those who support it. With over 32,000 views, the sequel now has a high chance of being green-lit. The reason I did not guarantee it is because I still need ideas. I plan to take a break from fanfiction in general as I plan to write a story on FictionPress. Don't worry; I will get back to it eventually. I don't know when I will be writing the oneshots, but look forward to it.