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Highschool DxD: Into The Multiverse

After walking away from the Devils and becoming a pure-blooded Dragon, Issei Hyoudou wants to live an ordinary life while being strong. However, the force of evil known as the Khaos Brigade won't make it easy for him. Some Primordial gods want him dead while others wish to protect him, and he isn't sure who to trust. Leaving Rias' peerage, training, war, the world at stake, and magical + supernatural phenomena have thrown his life into chaos. Issei x Raynare main pairing. Harem. OP Issei but not too OP. Issei will be a lot less perverted than canon but as perverted as any average 16 year old boy. Lemon warning: At least one lemon per harem member. Major crossovers with DOOM, Halo, Avengers: Infinity War, The Devil Is A Part-Timer, and Hellsing. Minor crossovers with Akame ga Kill, Chivalry of a Failed Knight, God of War, and 300. Updates are slow at no sooner than every three weeks. Current Word Count: 264K+ Goal: About 112 chapters and 750K+ words. Story is already planned out. Published November 1, 2020

AllHailThe99th · Anime & Comics
Not enough ratings
40 Chs

Newbie

('Ddraig speaking telepathically')

("Ddraig talking out loud")

['Albion speaking telepathically']

["Albion talking out loud"]

'A character's thoughts'

Somewhere deep in the pits of a place of suffering, there lay a massive castle. Rivers of fire and the blood of the wicked surrounded it.

In the castle, there is a dark, massive room that screamed Luciferian architecture. The frontside and backside of the entrance door are decorated in engravings of an upside-down cross as well as multiple skulls with horns protruding from the side of each head.

The walls on both sides of the room were laced with six evenly spaced tall windows made of magical barriers, not glass. The same horned-skull decorations lay in between each window but with actual bones and placed on spikes sticking through their mouths.

The room, despite lacking visibility, shimmered with moonlight as, the full moon, in its entirety, was seeped in a blood red visage.

At the center of the door on both sides, as well as in the very middle of the massive room, is a pentagram, which somehow emitted a crimson light. To any intelligent being, human or not, it would be plain as day that this is the realm of eternal torment and punishment known as Hell.

At the far end of the room, the Six Demon Generals kneeled before a hooded figure, their lord, who sat in his throne, which was also surrounded by his decorations. His right arm rested on the arm rest with his hand resting resting against his cheek, his left leg crossed over his right, almost in an aristocratic way. This was the son of God who fell from grace, a former Angel who wouldn't bow to Jesus H. Christ, cast away by the Father into the fires of Hell for his disobedience. This was the most hated and feared being of the three major Abrahamic religions. This is none other than Satan Lucifer.

A/N: I know that this pic shows Darth Maul from Star Wars, but Darth Maul's looks are supposed to be based off the Christian Devil.

On both sides of the aforementioned door, inside the room and outside, stood two Barons of Hell on each side, a total of four each. These were the personal royal knights of Satan.

Satan didn't say anything to his Generals, who quivered in fear, instead choosing to look down into his left hand wherein lay a magical crystal ball. A deep, demonic growl emerged from his throat as he sighed.

He studied the magical object in his hand closely. It was a memory of what he witnessed from past a battle one of his Demon Generals fought. Nothing was moving in the ball, not until he willed it to. He raised his head and gave a sharp glare to all of his Demon Generals.

"All of you raise your heads and watch closely. What you learn from this could make the difference between life and death in your next battle against Him," The Devil announced, his inhumane voice echoing loudly in the room, catching the attention of his guards who watched from the door, about 200 meters away.

The Six Demon Generals raised their heads right as The Dark Lord played the memory.

One of his Generals growled under his breath in disdain at humiliation of the memory. "Slayer..." The Icon of Sin said.

Chapter 1: Newbie

It is April, and Issei is now about to start his 1st year of High School at Kuoh Academy, and he is very excited. It recently became co-ed, so Issei thinks he might have a chance at getting a girlfriend...

"Hurry up, Issei! We're going to be late if we don't leave now!" Irina yelled from downstairs.

"I'm coming! Mom, dad, did Vali already leave?" Issei asked as his mother handed him his bento.

Vali and Irina live with Issei now, so they had to make quite a few renovations to the house by adding two rooms, although Irina and Vali both got part-time jobs, feeling the need to pay back the Hyoudou's for their kindness.

"Yes, he already did. That boy is more punctual than you despite seeming so relaxed all the time. Now go, and remember to behave yourself," Miki Hyoudou said, giving her son a kiss on the cheek.

Gorou Hyoudou lowered his newspaper and looked at Issei with a smirk. "Make sure to come back with a few wives and grandkids for me, okay? Make a harem!"

Mrs. Hyoudou took out a wooden spoon, walked up to Gorou, and smacked him hard on the crown of his head. "Stop being such a perv!"

Issei chuckled as he left the house with Irina and made their way to school.

. . .

They made it through the first three periods of class in which they introduced themselves and were already given homework. Luckily their teacher is a hot lady. Her name is Rossweisse.

Issei thought, 'Where does her name come from, I wonder? Germany?'

Anyway, it is now lunchtime. Irina and Vali waited for Issei, and the trio made their way to the cafeteria and got their food. Of course, Issei already has his, but the other two wanted to buy something.

"Follow me, you two. I found a nice place outside to eat." Vali said, leading them to a small hill that had a chain-link fence at the top. Behind the fence was the school track and soccer field. To the left of where they sat and behind the fence was the tennis court, and right in front of them a good distance away was the baseball field as well as the school entrance, which was much closer.

People were going about their day when suddenly all the girls stopped to turn their attention towards the school entrance, loudly admiring three beautiful girls who entered the school grounds.

"It's them! It's the Great Ladies of Kuoh!" One girl loudly proclaimed.

Vali and Issei exchanged confused looks and simultaneously said, "The Great Ladies of Kuoh?"

"WHAT?! YOU DON'T KNOW WHO THE GREAT LADIES OF KUOH ARE?!"

"Gah!" Issei nearly choked on his food and coughed a little as the three turned towards the voices.

It was the two school perverts, the infamous Perverted Duo, Matsuda and Motohama. Yes, they already made a name for themselves. During class introductions, the students were told to say something that they like along with their names. These two said they love peeping on girls, easily earning many facepalms from the guys, Vali and Issei included, as well as looks of disgust from girls. Those few girls sitting closest to them scooted their desks away to sit with as much distance between themselves and the new-found danger. No one can blame them. Luckily, Irina was sitting right in front of Issei, so she felt safe there.

Irina now hid between Vali and Issei to shield herself from any lechery.

"Where did you even come from?!" Issei shouted. They ignored him as they continued to inform the trio of who the three Great Ladies are.

"Well firstly, we have the Student Council President, Sona Shitori, 2nd year student. 5 ft 5 inches, 112 lbs, B30-W22-H33 inches. Delicate as an orcate, fair as a cherry blossom, and the personification of feminine grace! ... And a dude. Tall as a willow, slender as a reed. A dude. Radiant in shrine vestments! A dude (6)." Motohama said as Matsuda punched him, causing the bespectacled pervert to spit comedically as he fell.

"President is not a trap! That's disgusting!" Matsuda shouted as other teen got up.

"Oh yeah?! There's no need to fetish shame me, you loli-loving pedo!" Motohama replied.

The three hill-settlers watched this exchange between the Perverted Duo in disgust with beady eyes, mouths ajar, sweat-dropping, the whole nine yards.

Matsuda cleared his throat. "Anyway, the next one is 2nd year student Rias Gremory. I don't know her measurements, unlike this moron who has the gift of being able to instantly discern a girl's measurements by looking at them with his glasses on," He said, thumb gesturing to Motohama before he then put both index fingers and thumbs in the shape of a camera pointing it at Rias as she walked by. "As you can tell by her amazing looks, she's basically a teenage supermodel. I mean, look at those huge tits! Fuck dude, I would love to get titjob from her. I bet it would feel amazing for my dick to be buried between her amazing gazangas!"

"In all the time that the two of you were monologuing, how the hell are the Great Ladies not inside the school already?!" Issei exclaimed in annoyance, to which the duo ignored.

Matsuda continued. "Anyway, the third, final, and arguably the sexiest girl in the entire school is Akeno Himejima, a 2nd year student. She somehow has boobs even bigger than Rias. All three of them have one thing in common though, and that's that they all have nice thighs. Heh heh."

Issei heard Vali, who was getting annoyed, sigh. "Alright! We get it! Now please leave so we can eat in peace."

. . . . . . .

As Rias and Akeno arrived at the Occult Research Club building, Rias opened the window and kept her eye on someone. There were two boys and a girl sitting on a hill. She could sense that the girl is an Angel, so she will have to have a talk with her as to why she is in Devil territory, but those two boys...

"Akeno, who are those two boys?"

Akeno was setting her tray away after serving tea to the four. Kiba took a sip as he read a book, and Koneko gently blew on hers while occasionally nibbling on a piece of candy.

Akeno looked to where Rias was staring. "Those are two 1st year students. The brown-haired boy is named Issei Hyoudou while the tall, white-haired one is Vali Lucifer... Why do you ask? Got a crush or something?" Akeno said, trying to tease her friend, who ignored her remark.

"Lucifer, huh. I wonder..." The redhead put a finger to her mouth and tapped it in thought. She turned to Akeno as both Kiba and Koneko listened to their President's conversation. "I'm interested in those two because I can sense great power in them, although I do not know what. I do sense that the girl with them is an Angel. Kiba, tomorrow I want you to bring those three to our club. I want to meet them. Koneko, start following them when they leave school and determine if they pose a threat to us."

"Yes President." Her two servants responded.

Koneko followed the trio home, spying on them, watching their every move until they made it inside their house. They look like ordinary kids with ordinary parents living ordinary lives, but it is too early to come to a full conclusion without proper evidence. She knows that she needs to spy on them more, but the weird part is that all three children seem unaware of the supernatural world's existence and of their own powers.

Koneko teleported back to the ORC. "President, I am unsure of their intentions as they seem to not be aware of the supernatural world and might not pose a threat. Even the Angel with them might not know what she is."

Rias hummed as she was playing chess with Kiba, Akeno sitting next to him, trying to help him win. "Let's keep an eye on them until as late as Friday of next week. If they do not show any signs of posing a threat in that time frame, I think it will be safe to say that they are not a threat to Sona and I, or any Devil for that matter."

"Yes President." Koneko bowed briefly.

Rias moved her Knight. "Checkmate."

"Damn." Kiba scratched his hair in frustration at being unable to beat Rias as Akeno tried to comfort him, patting his back as if to say, 'I feel your pain, bro.'

. . . . . . .

That night, when Issei went to sleep, he had a strange dream. He stood near the top of a mountain. The mountain had some snow on it but mostly greenery. On the summit is a massive lizard-like creature. As Issei got closer, his eyes widened. 'Wait a fucking minute, is that a Dragon?! Holy shit!'

("Yes. Holy shit, indeed. I am a Dragon, partner, and you are my host. This vision won't last long since you are still not strong enough to use my power, but it's nice to meet you. My name is Ddraig.")

Issei was astonished. "Oh, um. My name is Issei Hyoudou, and it's nice to meet you too."

("I'd imagine that right about now, your friend Vali is having a similar dream with his Dragon, Albion. Anyway, you should wake up now and get ready for school.)

The dream ended, and as the three friends got ready to go to school and left the house, Irina voiced her concern over our behavior. "Issei, Vali, what's wrong? You both look lost in thought."

Issei gulped. "Well, I had a weird dream where I was talking to a massive red Dragon. He said I'm his host or partner and that Vali is probably experiencing a similar dream with a similar Dragon."

Vali nodded in affirmation. Irina looked confused.

. . . . . . .

As the boring math class ended, and with it school, most of the girls squealed as a blond boy walked in, smiling politely at them. Most of the guys, Issei included, were jealous of his good looks, and they gave him glares.

He walked to where the three sat and said, "Excuse me, you three are Issei Hyoudou, Vali Lucifer, and Irina Shidou, right?" They nodded, confused. He smiled. "My club President Rias would like to see you. If you would, please follow me."

They looked at each other, shrugged, and stood up before following the school Prince. He took them to an old but beautiful veranda-styled building with two stories. Arriving at the second floor, he knocked on a door and said, "President, I brought them" before opening it.

Inside, there were two girls, one of which the trio recognized as Akeno Himejima. 'Holy fuck, she's hot!'. Issei tried not to stare too much at her since he knows he would end up embarrassing himself and possibly her as well. The other one was a white-haired girl, a rather petite one for a high schooler, eating a bag of nmn's with some MgRonald's vanilla ice cream.

They heard a shower running somewhere but didn't see Rias until she stepped out of the bathroom in a towel that barely covered her thighs. ('Are you fucking trying to give me a boner?!') Vali shifted uncomfortably at the sight next to Issei, having similar thoughts.

Rias smiled at them as she walked around to the stereotypical club President desk and sat down. "Hello. My name is Rias Gremory. Please take a seat. I am President of the Occult Research Club. My other club members should also introduce themselves if they have not already."

"My name is Kiba Yuuto. Nice to meet ya!" He said, winking at Issei. 'Is he gay?! I fear for my chastity!'

"I am Akeno Himejima, the Vice President of the ORC. Nice to meet you." She says, smiling at Issei with a strange look in her eye. 'Senpai, did I do something bad?!'

"... Koneko Toujou."

The three introduced themselves, and the conversation started with small talk. "Any sports you like to play? Are you single?" That last one was Kiba. Bastard.

Eventually the conversation shifted in a direction the three didn't see coming.

Rias cleared her throat. "So, onto the purpose of this meeting. I am going to ask you a few questions, and I want each of you to answer me as honestly as possible. Let's start with you, Issei. Do any of you believe in the supernatural?"

He blinked, confused at the question. "I... I do. Unfortunately, I don't think I have ever seen anything that would count as evidence of such." Issei said, half-lying. He is not sure why, but he can sense that she may have ulterior motives.

Vali spoke. "I concur with Issei."

Irina placed her finger on her lips in thought. "I believe in God, that much I know, so yes."

Rias nodded. "Okay. Now I have a question that is specifically for Irina: What is an Angel such as yourself doing here on Devil territory?" She asked, her eyes narrowed a little, trying to add intimidation.

Their eyes widened. Vali and Issei looked at Irina and simultaneously said, "An Angel?"

Rias nodded. "Yes. Irina is an Angel, and the four of us in the ORC are Devils." At the same time, they revealed bat-like wings. "The Angels and Fallen Angels are our enemies."

Irina's expression shifted from confused surprise to worry and a bit of fear. "I-I wasn't aware that I am an Angel. I mean you no harm, really!"

Rias sighed before she smiled as the four ORC members put their wings away. "Okay. I believe you. Now, as for Issei and Vali, I personally believe that the two of you have very powerful sacred gears, a gift given to a human from God to defend themselves. God made that happen because many innocent humans were caught up in the crossfire of the Great War as the Three Factions fought one another. I have no idea what kind of sacred gear you two have, though."

"The Great War?" Asked the boys.

Rias waved her hand. "That's a story for another day. Now, Issei and Vali are going to need to figure out how to awaken their sacred gears, because sooner or later supernatural entities are going to try to recruit you or attack you, probably both. I'd rather that the two of you be well prepared to defend yourselves."

She smiled at Vali and Issei convincingly, the two of them still shocked from this news. Issei cleared his throat and asked her, "Why are you trying to help us? What's in it for you? It's obvious to me that you're hiding something. You have ulterior motives."

For a brief moment, he could see a bit of nervousness in her eyes before they shifted to sadness, briefly looking down. "It... It's because I am desperate. I need powerful allies, and I was hoping you would join me."

Vali blinked, his sharp blue eyes piercing into the Gremory heiress. "Why?"

She sighed. "My parents have forced my hand by putting me in an arranged marriage with another Devil that I hate, and the only way to get out of such a situation would be if I fought him in a rating game, which is a competitive fight that only ends until one of the two Kings surrenders or is too badly injured to continue. You see, us Devils use a system called the Evil Pieces system based off chess pieces. I am the King of my peerage, Akeno is my Queen, Kiba is my Knight, and Koneko is my Rook. I was hoping you would let me turn one or both of you into a member of my peerage using some of my remaining Evil Pieces."

Issei and Vali sighed, feeling sympathetic but cautious. Issei spoke, "I see. I'm sorry to hear that. Would that take away our humanity and turn us into Devils?"

Rias nodded. "Yes. You would be like us. You would still look human, but you would be a Reincarnated Devil. In return for your help, you would be trained and become strong enough to not only defend yourself, but you could also have your own harem, and harems are permitted in the underworld."

Issei wanted at least one girlfriend, but he didn't know what to feel about having a harem since he had no experience with such an idea. "... Then we will have to refuse your offer. I'm sorry to hear about your arranged marriage. If you ever want to talk about it, I'm here for you."

Rias smiled gratefully. "Thank you. Um, oh yeah, before you leave, Vali, you should know that you are part Devil."

Vali was surprised but not shocked. "Is my Grandfather the cause?"

Rias nodded. "Yeah... How did you know?"

Vali furrowed his eyebrows as he stared off to the side, reflecting on his past. "Well, my Auntie said that my parents were murdered by my Grandfather. She always said he was a Devil. I never would have figured that she meant it literally since I always thought she was saying that he is pure evil, which he probably is. I love my Auntie and always listen to her, so it is partly because of her that I hate my Grandfather."

Rias nodded. "I'm sorry to hear that. Um, if you don't mind asking, what is your Aunt's name?"

"Grayfia. She's my evil Grandfather's niece. It must be her brother, my father, Euclid Lucifuge, who is the Devil, but I ended up with the last name Lucifer because my mother was a human, which must be how I got this 'sacred gear' you speak of. Why do you ask?"

Rias' eyes widen. "G-Grayfia?! Wha... I... She's... *ahem* She is my sister in-law. She's married to my older brother, who is one of the leaders of the Devils, a Devil King. His name is Sirzechs Gremory. He is the only one trying to get me out of this arranged marriage as peacefully as possible without making himself look bad by giving me special treatment. It's frustrating."

Vali's eyes widen in shock as he listened to her. He collected himself before he replied. "I see. so that would make you and me distant... relatives? Siblings? Cousins? I'm not sure what term to use in this situation."

Rias giggled. "Distant relatives, but you can call me big sis or Rias."

Vali scratched his head. "I think I'll just stick with calling you Rias."

Issei and Irina knew about Vali's relationships with Grayfia and his spooky Grandfather figure, but they were equally surprised to learn that Vali is part-Devil. Nonetheless, they were happy for Vali to know that he has a relative in Rias, and subsequently the possibility of a powerful ally in Sirzechs.

. . . . . . .

Issei, Vali, and Irina were on their way home when they were stopped by a voice.

"Hey, wait! Issei Hyoudou? I want to speak with you please."

It was a girl with long black hair and violet-colored eyes.

To Be Continued

References:

(6) Steins;Gate

Issei's Harem (same as peerage members, most to least powerful, will not change):

Issei Hyoudou (Mutated King)

Arisu Yamauchi (OC, Six Mutated Pawn Pieces)

Raynare (Main Girl, Queen)

Akeno Himejima (Knight)

Kuroka Toujou (Bishop)

Irina Shidou (Rook)

Tsubasa Yura (Knight)

Rossweisse (Rook)

Ravel Phenex (Bishop)