2 Souls in pain got together to ease each other pain and eventually got together (18+ and up)

Izuku and Clover Midoriya gave it everything they had with their Pokémon. They defeated All For One and Tomura Shigaraki. But just before Tomura died, All For One had just enough strength to open up a wormhole that sent them into a completely different universe. A world where there are no quirks or heroes, but instead, space quakes and Spirits. Soon, they meet a boy named Shido Itsuka and many more. As well as learning about the dangers of these Spirits. And only Shido and Izuku have the power to subdue them without killing them. And how? Date them and make them fall in love. Then kiss them to seal their powers. ...This may be the hardest thing Izuku will ever do. Little does he know that he has help from Arceus himself. Can Shido and Izuku win the hearts of these girls? Or is the world doomed?

Izuku Midoriya is born with a different quirk, not something he's sure he was supposed to have but here it was anyway. The AU where Izuku is born with Nine's Quirk, though he does not know the full potential of his own Quirk, rather than using it for villainy he uses it to improve the world. cross posted from AO3 *cover art is not mine

The Midoriya twins always dreamt of becoming heroes, but after Izuku is kidnapped and separated from his sister, they both become heroes sooner than expected. Not that it's legal though. DISCLAIMER: Mha and jjk do not belong to me

UA was having a family day as Izuku was enjoying his time with his family (adoptive family/redemption Family). Izuku meet his friends family and the dads of the girls who do not like them. When they meet with a mysterious animal turns out to be Izuku's best friends/Pet.

Izuku after being neglected for his twin sister by his parents awakens his quirk and strives to be the best hero he can. Izuku basically has both of kaidou and blackbeards devil fruit abilities.

(Betrayed Izuku X Melissa Shield X Gwen Tennyson) Izuku Midoriya was framed for a crime he didn't commit. The only ones who believed in his innocence were his daughter Eri, Kota, the Wild Wild Pussycats, Eraser Head, Midnight, Melissa Shield, and her father, David Shield. As he was being arrested and taken to prison, his transport vehicle was intercepted by Kurogiri, who used his Quirk to warp Izuku, Eri, and Melissa to another world. When they woke up, they found themselves in the world of Ben 10. There, they met Ben Tennyson, his cousin Gwen, and their grandfather Max. The trio introduced themselves. Unknown to the others, Gwen started blushing when she saw Izuku, though she felt a little sad seeing he already had a girlfriend and a daughter. Melissa noticed and later pulled Gwen aside to talk. After their conversation, both agreed to share Izuku. Eri, overjoyed, called Gwen "Mama Gwen," which made Gwen gush at the adorable snowball of a child. Just then, they noticed a fire in the distance and quickly realized Ben was missing. Izuku told Melissa and Eri to stay at the Rust Bucket. When he found Ben, he had transformed into the molten lava alien known as Heatblast.

Izuku Yagi. Son of Inko Yagi and Toshinori Yagi. Brother of Izumi Yagi. Is his life a good one? Eh. More or less. Because he was born quirkless, he was constantly bullied by most of his peers. Luckily, there were a few people that supported him. His family, for one. But the one who has supported him the most is his very best friend, Ricky Steel the Riolu. One day, however, Izuku was killed by a Fallen Angel and was then resurrected as a devil by Rias Gremory. Now he is a part of her Peerage and is also the Red Dragon Emperor. Luckily, with Ricky by his side, he can get through anything. But what happens when he and Ricky tap into a hidden power that very few can use? And what happens when Izuku accidentally rizzes up the girls of the Peerage? And what happens when his father, who turns out to be All Might himself, makes Izuku the successor of his quirk?

Izuku wasn't born with a quirk and was bullied by his friends and neglected by his family members, but that didn't stop him from trying. It wasn't until he met some people in his dreams and taught him different types of energies that were long forgotten.