What would happen if the Grey Sisters, of Greek legend told the leaders of the Greek Patheon about the dangers that were coming to the town of Kuoh? Threats that would, in time, come for them if not taken care of. Well, they would send a Demi-Olympian of their pantheon to help take care of said threats. Also, Issei has a twin sister in this story.

Tras pasar tantas adversidades, Ise y compañía aún deben hacer frente a retos más difíciles. La verdad de un pasado oculto, entes que desean acabar con el mundo. Mantener el legado de quienes salvaron el mundo antes que ellos. Poderes, sentimientos y dedicación, eso era lo que iba a cambiar el mundo. Cambio liderado por el Sekiryuutei Supremo, este es su Ascenso. (IsexHarem)

A man finds himself within a world familiar, yet alien. Bereft of the usual boons, the revelation that he is on his own and starting from the bottom is harsh. What he DOES receive, however, is perhaps the greatest tool available to any engineer: the ability to automate. One may be weak, but the strength of the many cannot be denied. (Golem Crafter MC) (Factorio Xover?)

What if Issei punished Rias for letting him die? Far more prepared for the supernatural than canon before his death, Issei Hyoudou is a strong, kind boy, but even the kindest people have their limits before they snap.

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?"

Being the son of Poseidon and the Champion of Hades is stressful enough as it is. Thankfully, I had a busty blonde nine-tailed fox, her daughter and a silver-haired Valkyrie to help me deal with it. Now if I didn't have to be a teacher for a bunch of teenage girls, my life would be amazing. Oh well, at least the view is nice. Strong Demigod MC to OP Demigod MC, No Sacred Gear.

Every tale has its own beginning, and as for our protagonist, Hyoudou Issei, his story begins with a fateful encounter in the park. His life really turns from the ordinary to the extraordinary. But hey, at least he found himself surrounded by beautiful girls. Issei x Harem.

He's just a guy with the ability to make the unordinary ordinary. There are worse things to fear.

There's just something hilarious for the world to set me in the body of someone that would have been known as the femboy dhampir option but... I guess I can play a different game just for the fun of it! And I am looking forward for some fun! Gasper!SI

Baba Yaga, the Boogeyman, an entity that haunts the dark forest, and devours children offered by its worshipers in exchange for riches and other earthly pleasures. It was a false Deity, an evil God. Nikolai Volkov, was chosen to be the next Baba Yaga, but something went wrong. With his memories wiped out, how will he fare in this absurd world. [ DEVOUR! ] A voice was heard.

Prince of Asmodeus REWRITE. A world is torn by the aftermath of a devastating war between Devils, Angels and Fallen Angels. When the dust settles, the son of the original Devil King Asmodeus awakens from a century-long slumber. As the secrets of his past and the mysteries surrounding his family unfold, a tale of power, loyalty, and forbidden love emerges.

This is my first attempt at creating a study. The character's name is Halil Bozkurt, an original character (OC) of Turkish origin, who possesses the Boosted Gear. The story involves interactions between OCs and characters from Turkish mythology (OCxORC). You can find more information about Halil Bozkurt's character profile on the DxD Fanon Wiki.

This is just an anthology book of the boy Issei Hyoudou in multiple lewd situations with different waifus from different animes

Ise's friends turned their back on him, didn't they? They didn't consider his feelings and selfishly pushed their own agenda. These actions have consequences. They will learn. Even if they don't want to. The road to becoming an adult is difficult, isn't it? But for the sake of the future, they must all mature. No more being stuck. Make your move, Ise.

Issei is a beast. Not just any normal beast, but a Beast, and a perverted one at that. If that isn't bad enough, he also possess the ultimate weapon for sexual assault, tentacles! Good thing he has his wives Rias and Irina Hyoudou to keep him at bay. (FLUFFY DXD)

What if Issei was already a demon, what if he didn't have a Longinus but a mid-level Sacred Gear. A human was given the opportunity to become a demon,he accepted his life, it took a turn but after so long he and because of some things, he needs to move away.

Zorro Kuro lives most of his life as an ordinary kid helping his father with his restaurant. Imagine his surprise when he learns he has supernatural blood flowing through his veins and a destiny that threatens Japan as a whole!

Issei Hyoudou é um rapaz normal que vive com seus pais e frequenta o segundo ano do ensino médio, mas um dia foi surpreendido com uma mensagem de uma tela flutuante assim que acordou. O Sistema foi ativado, o usuário Hyoudou Issei agora é um Gamer de level 1 e deve evoluir ou irá morrer.

Caught between the world of human and Devil, while never fully belonging to either, a young man begins discovering more about himself, and those around him. Wielding True Longinus, and his demonic powers, Naota strives forward and begins his journey into creating a better life for him, and those like him.

A shut in NEET dies without a single accomplishment he lived such a pitiful life even the gods took pity for that reason when his life came to an end instead of pearly gates a screen pops up

What if Issei's life was tweaked a little, changing not only him but the world around him. ( MAJOR REVISED)

After the defeat of Trihexa Issei finds himself in a familiar situation in the ORC clubroom. This time however not everyone turns against him but with his relationships far deeper than they were in the past what will the consequences be this time? [Issei x Small Harem] [Issei x Irina] (Betrayal, Riasbashing,Anti-ORC)

"What if Issei joined the Phenex family?" The story takes place during Issei's date with a strange girl named Yuma. Will Issei be slaughtered by the fallen? Will he be rescued instead? Perhaps a pair of high class devils are keeping an eye on the wayward teen? Other girls will include the majority of the Sitri and Phenex peerages. Yandere, Tsundere, Harem, Gender-Swapped Riser.

He used to be a casual fan, nothing special besides his home's circumstances. But after finding himself possessing the body of Diodora Astaroth, a minor villain destined to die a pointless death, suddenly everything started going wrong. With little more than his knowledge and eloquence, in order to survive and thrive... The new Diodora will take matters in his hands.

You know, I never expected to reincarnate, specially not in a blond vampire who can stop time and is also a crossdresser. Yeah, I could have gotten Dio, but instead I'm now Gasper Vladi. I wonder, what changes can I make to this world and get away with? They say the best way to deal with a sociopath is to not play their game, but what if I'm the only who can see all the pieces?