Instead of Riser Phenex, Rias is engaged to someone else. Damian Mammon-Lucifer, heir to the Houses of Mammon and Lucifer. He is sent to Kuoh Academy to meet Rias, and a whole mess of problems follows with the likes of Fallen Angels, crazy Exorcists, and a massive terrorist group called the Khaos Brigade. Rated M for language, nudity and sex. It's DxD after all.

an alternative world full of singularities where the vastness of the universe or perhaps beyond is yet to be discovered things and actions hide things to see

Waking up in the world of DxD would have been just ridiculous, but here I am helping the teenage devils getting through their trials and challenges while trying to find out why I'm here. Self-insert. Contains elements from other anime. (Anyone who wants to join my Discord server or add me as a friend, the info is in the AN of first chapter.)

Alexander was a college-aged man who got mixed up with some bad people thanks to his old man. After his tragic death, his soul is placed in a dying body as a peculiar Goddess supports him in his journey through this new world he's experiencing, as long as she gets some good "entertainment" of course. [Gamer Fic Yaoi Dom Protagonist Quickly Becoming OP]

"One day, I opened my eyes, and found myself vomiting off the top of the mountain. Definitely not the best way to start my day, or evening at that point. Then I got attacked by a mutated snake, taken in by a perverted virgin kitty, and went back home to get blown up by a dragon. Twice. And that's only the start. At least it's exciting? This new life of mine." (Demigod SI-OC)

Kazuto always had strange dreams of another life, a life where he had magical powers, but his reality was where he lived a regular life. That was until one day, when he was attacked and his powers awakened to protect himself, and is now on a journey to discover his past life, build his peerage, while facing new challenges being the Half Devil Sekiryuutei.

Shin was a 16-year-old kid when he was killed by the almighty truck-sama, miraculously Isekai'd to the DxD world. Naturally, as a hormonal teenager with future knowledge of the show, canon was doomed the instant he was reincarnated. OC MC! Will divert from canon! Smart MC! Crack-ish! Semi-OP MC!

On one hand, being reincarnated with an admittedly lackluster System is a dream come true. On the other hand, being thrown into the middle of a Civil War isn't exactly the best start to an Isekai adventure. (GamerSI-OC) (GamerxHarem)

A human soul’s life in an unknown fantasy world filled with mysteries and danger began. Can't fit the whole synopsis in this (the limit is 300 or so characters), so please make do with the last line xD.

Andreas, an enigmatic chess virtuoso visiting Kuoh Academy, shatters norms with an unforeseen triumph. Sona unravels a familial pact that binds her fate to the cryptic newcomer.

Atrapado accidentalmente en un universo distinto al suyo, Hideki (lector) intenta adaptarse a una vida llena de criaturas mágicas y seres de poder abrumador, todo mientras sigue siendo un simple humano. A pesar de su falta de habilidades sobrenaturales, su coraje, fuerza física y determinación lo convierten en una figura inesperada dentro de la Academia Kuoh.

He had promised to keep her safe. Unfortunately, fate had different ideas. However, that would do little to stop him. After all, the hero's role in the story was to protect the Princess, right?

A void was his home. He has been floating there in silence, staring off into nothingness. Everything was silent until he heard a voice. "How would you like to live out your fantasies and turn them into reality?"

Cualquiera pensaría que ser hijo de una de las mentes mas brillantes del mundo, estar rodeado de familia, amigos, y tener un enorme potencial seria tener una vida maravillosa. Desgraciadamente la realidad es muy distinta, Ise no sabe lo que le depara el futuro, de lo único que esta seguro es que su alma esta llena de Perseverancia y nadie le quitaría lo que tiene. Crossover. Harem.

This is the tale of Alicia Claudius Ambrosius, the flower mage, whose life was forever changed by fire, but whose spirit remained unbroken, blossoming like a flower in the midst of adversity. OC! AU!

This is the story of Ryun (Rune) Tsuchimikado, the pawn of Rias Gremory and The last of the Tsuchimikado family. Throughout Ryun whole life he has face hardships after Hardships, the lost of his family to the death of the person most dear to him. He vows to himself that he will begin much stronger and protect what most dear to him. OC Main, OCxHarem.

The whole world believs that Yahweh was killed when sealing Ddraig and Albion into sacred gears. However what angels couldnt comprehend was that in making this miracle, the device responsible for creation of sacred gears, made its last miracle: saving of his creator, by putting it into a sacred gear. Yahweh himself is now inside one of his own creations. Hentai included occasionaly

An average man finds himself Reborn as Millicas Gremory read as he navigates this new supernatural world. (I suck at the summary).

Request fic for keller.blair1. Issei unlocked his [Sacred Gear], Divine Dividing on a young age and from a young age, he has been working for the Vatican as part-time exorcist. Fed up with the hypocrisy and decadence, he leaves Rome for a place he called home. Kuoh, which seemed to have become a hot spot for Super Natural Creatures. Perfect spot for a Dragon to build his harem.

An Eroge-induced epiphany leads Hyoudou Issei down a path of hard work, excellence and extreme degrees of trauma suppression. Add to that a grumpy old dragon, an overpowered sacred gear, a frisky succubus and munchkin-worthy tactics that put the capital P in "Power Creep", and you've got yourself a nice mess. Oh, and there's also devils, and angels, and stuff. (Cover by Yutaku)

17 year old Sukehiro Natsuki was trying her best to fight against the life of poverty and isolation that she was born into. Now given the chance to go to Kuoh Academy, Natsuki finds herself thrown into a world she never knew existed as she tries to find her place in it and discover who she really is. Warning OC G!P. No harem for OC (Eventual Romance), Issei/Harem

Being sent to another world where the supernatural reigns supreme wasn't on Ryoto Gurin's checklist, yet here he was. Now reborn hosting one of the most monstrous beings in this world he must fight and overcome against some of his most difficult challenges like high school or girls... or literal Gods and Demons wanting to rip him limb from limb.

So I was hit by a truck and died. To make things more complicated I was reincarnated with a Sacred Gear in the DxD world. So you know what I'm gonna do? I think I'm gonna do what I like to call a pro gamer move.(rewrite is up!)

In one corner of the infinitely-vast universe, there lies an unfinished story of a first-year high school student burdened with the powers of the seven of the most evil creatures of yore. Now it is rewritten anew, as the shadows of both past and future begin waiting in this thorny road of self-actualization. (adopted from dvdryms' original story canceled in 24th of January, 2024)

what happens when Raynare truns Issei into a fallen angel? instead of killing him and real love flourishes between, the two and she promise to make his harem dream come true. warning female Vali and female Gashper and large Harem.