Sometimes, small things can have unforeseen consequences. Like the butterfly causing an hurricane. Or the nail costing a war. Or the snotling messing around where he shouldn't causing the rise of a different kind of hero... "Awigt den, come have a go, ya gits! Waaaaagggghh!"

Tatsumaki was just your 'average' (and powerful) teenage girl with an esper-like quirk when she met a teenage boy named Izuku Midoriya. Now, because of an incident, she's forced to go to a highschool for upcoming heroes with quirks. How will that go?. (Possible Izuku and teenage Tatsumaki pairing.)

The Sharingans Tsukuyomi is a powerful tool, able to reach the very soul. When Sasuke wakes up the day after his brother killed his entire family, it is with the memories of another life in his head. (Saitama is reborn as Uchiha Sasuke, making the world a very different place.) (Slash, AU, Crossover)

Hitsugaya Toushiro is in another sticky situation. He's stranded across dimensions without a way home, and he'll do anything to return - even turn to crime. But the UA and a kind green-haired boy won't let him side with the villains, no matter what happens. Because every broken soul deserves healing and Izuku is just too good for this world. Post-TYBW War, PTSD. Slow updates.

Saitama, a seemingly invulnerable hero, faces a self imposed existential crisis. Still unable to find a worthy opponent, his spirits continue to remain at an all time low. Unbeknownst to him, the Space Emperor Lord Frieza gets wind of Lord Boros' demise, and takes swift action to remedy the situation. So Saitama might just get exactly what he's looking for, and a little bit more...

When Saitama and Genos have a mishap with a certain alien ship's warp drive, they find themselves dazed and confused on the ground at USJ. How does everyone react to the duo's presence at UA? With rising tensions, strong enemies, and some strange hijinks, let's find out! Rated T for some language and violence.

Saitama is suddenly swept away to the world of One-piece. The beginning of a new adventure? Surely; Enemies that don't die in one punch?...Not really.

The good hunter, David did all that he could during his stay. Now the foreign hunter will have many other trials on this new land, where the creatures of Grimm roam on Remnant and odd encounters make the experience entertaining.

Gohan was going throughout his daily routine, but was sent to Bulma's place by his mother. While there one of her machines goes haywire and teleports him to the world of Boku No Hero Academia. Will he return? How will he adjust to his new life? Find out on the next episode of Dragon Ball Z

In the world of My Hero Academia, lives the caped baldy known as Saitama. He lives in the world of My Hero Academia as he goes through life full of superhuman beings gifted with abilities known as quirks. The world however does not know his true potential, how will Saitama reveal to the world his true strength?

When our favorite caped baldy suddenly gets transported to the world of Imperial arms and a corrupt empire, a serious twist of events lead to him joining the most feared assassin group of the land: Night Raid.

A malfunction during the Forward Unto Dawns escape from the Ark occurs. Chief, Arbiter, and Cortana find themselves on Remnant. In order to survive they must learn about this world and the many dangers it brings. How will Chief and Arbiter fair against Remannt? Only one way to find out.

You think your Dragonborn is so overpowered that the quests of Skyrim become boring? You think no one in Skyrim properly acknowledge your mighty deeds that save the world? Then I guess you can understand a bit about how Saitama feels as the Dragonborn... or not. As an inevitable result, this Elder Scrolls story with One Punch Man characters is AU... Very AU.

Former Master Vampire Hunter. Retainer. Friend. Monster. Traitor. After half a century and the commission of an unforgivable sin, Walter C. Dornez had finally accomplished his mission to destroy Millennium's research. But rather than the oblivion he had expected Walter instead wakes up in an unfamiliar time and place - with a shattered moon...

In the ruined crater that once held the Forever Fall, forces beyond Remnant's comprehension are stirring. Well, maybe more strolling around looking for Udon and the way home than stirring but that's beside the point; a bald justice has emerged into Remnant with his sidekick, seeking justice and defending the weak. After they fix the moon first that is.

After a strange incident in Y-City, Saitama is thrown in a strange land where everyone has superpowers, join him as he tries to settle down in this new land where lethal force on 'monsters' or anything for that matter is a big no-no.