Issei Hyoudou will grow up to be a genius and become a metal behemoth and there "might be" some mistakes but it's because I've been using chatgpt to create this story

During the fight in the church with Raynare and the rest of the Fallen Angels. Issei finds out about how Rias was trying to play savior to win him over to her side. What happens next is shrouded in the mysteries of history.

after Issei got betrayed by his harem he had lost all his emotions he finds a mysterious interest in technology which made him become more invested in technology but he needed to watch out because there were ghouls out there ghouls are much stronger since they don't have a weakness in holy stuff

Naruto Bael is one of the five heroes of the Devil Civil War and the most powerful Devil ever born. Naruto Bael has only ever loved one woman in his life, Grayfia Lucifuge, and to discover that she has cheated on him with his best friend and brother by blood Seeing them like that, Naruto became enraged and attacked Sirzechs. They fought for three days straight, and only one victor emerged: Naruto Bael. On his final restart to kill the traitor, Naruto Bael used the strongest attack on his once-friend, but his mother and aunt stopped him because it could have destroyed the entire Underworld. The fight that made the entire war look insignificant in comparison lasted for almost three days straight, with neither of the fighters giving either a moment of rest, which shook the Underworld as a whole to its core. Vast parts of the Underworld had been reduced to rubble and would take years to rebuild, though thankfully, no one was harmed after being evacuated to somewhere safe. He told no one where he was going, not even his family. All he left was a note saying he was going away and would probably return for a short time. After two centuries, Naruto Bael returns to the underworld to reclaim what is rightfully his, the title of Maou Lucifer. Will he succeed or not? Credits:- Jabari the Goat Sage

High school dxd reacts to a different high school dxd universe This story is not going to be mine I am just writing the reaction parts to a Fool's Heart https://m.fanfiction.net/s/12906688/3/

Issei falls into Purgatory after the fight with the Jabberwockys. He Never gave up and faught tell the end. He wakes up to find himself in Purgatory. Only to be shocked and sadden that he is dead. He remembers that Rizevim was being controlled by an unkown entity and plans the final attack in a month. But being in Purgatory will be a year for him. He vows to come back and save everyone and come back to his family and everyone else. Watch as Issei Hyoudo fights to survive in Purgatory and come back from the dead.

What if Issei gets betrayed by his lovers except one. He gets killed the one he looked up to but someone decided to give him a new life. Would Issei remember his past life and what would he do? Note: Some parts of the story may not make sense as the story progresses. Sorry. The cover is not mine.

what if issei parents know about the supernatural, they know about the sacred gear system, so they decided that they should have more children, so one of there children might have a longinus sacred gear and make them famous in the supernatural world. issei siblings all have secrets gear, and when his parents check to see if he has secrets gear he had none....but that's not true issei secret gear was sealed at birth by a mystery man who knows about the supernatural world and he wants the boy to have a normal life but what he did was for nothing. Issei parents and siblings will beat him to nare death every day and called him a failure I don't own high school dxd and the pictures use in this story, it belongs to it's respective owners

Issei went into a forest and found an ancient temple, containing an expensive, sacred artifact. But what happens if that's not the only thing he finds in there? What if he finds an immortal being who wants to revive his race? What if he becomes something more than human? Maybe not a devil, but something more a little more classic.

Issei and Kiba are the only ones left, but they don't know how much longer they can last, Issei and Ddraig propose an idea that might work, but would be completely stupid to attempt. Then again, when has an idea being stupid, or having low odds of working ever gotten in Issei's way? Y'all can probably see where this is going. They go back in time to when they were both kids, returning to their younger bodies when they do so. What will they change? Will their plan work? Does Issei still end up with his usual harem? Well, just read and find out. Also, Issei will know how to access his other forms, such as True DxD and AxA, but not right away. He'll simply know how they work and the type of training he's have to do to be able to use them. Hope y'all enjoy this bullshit.