As Saitama walked back to his apartment after defeating a monster with just one punch. He encounters a young girl lying on the streets. Rather than leave her there, he takes her back to his apartment and becomes his neighbor next door. How will she fare up with this life? Find out as she handles from Rampaging Monster to Eccentric Heroes. (Completed For Now)

Stories are merged and it's up to a burgeoning protagonist to fight through the tangled results. (Saitama SI)

Saitama is pulled through a portal into the MHA Universe after being lured into a trap, which may or may not have involved Mexican food. Now, with the aid of teenage hero Deku, his fellow Class 1-A students, and other characters from both universes, Saitama tries to get home and eliminate villains old and new with the kind of power only One Punch Man has.

Ryoga somehow gets lost in an entirely different dimension filled with superheroes and monsters! People who want him to join their dojos! And... Ranma-chan? Ranma 1/2 & One Punch Man Crossover. RyogaXRanko/Ranma-chan(Indefinite hiatus)(Chapter 4 will be the final chapter release)

Too fast. It happened too fast... One moment Eustass Kid was on his way into the next half of his journey into the new world, but all it took was the random appearance of a mystical cube and a supposed hero called Blast to tear apart his ambitions and leave him stranded in a world he knew nothing about. Also, who the heck is this caped baldy guy?

Saitama Awakens The Sleeping Beauty (I Own Nothing)

The Justice League are happy that the world has now tons of heroes to protect the world, but now bigger threats are coming and danger is at every corner. However, one certain hero gets the champions of Earth by surprise, a bald guy with a cape which might have powers that could rival Superman. Can Saitama and his friends get along with the heroes from the past?

Based on Boku No Overlord by PaulyThide. The Empress of Nazarick and her guardians find themselves in a world full of powerful individuals called heroes and villains. There Galadriel will choose if she wants to be a hero or a villain. But things go to a different direction when a bald hero from another dimension arrived and make things difficult for her.

What if Inko believed in Izuku so he trained and dedicated himself to being a hero? What if he broke his limiter and was rejected from the hero course for being quirkless? This is a story of how Izuku Midoriya became a vigilante greater than any hero. The quirkless Deku who became the One True Hero. OPM deku, martial arts deku, Izumomo, confident deku, smart deku, vigilante deku.

Stranded in an unknown world, but not alone, Saitama and his friends lived their lives in a strange world. They found happiness and peace, but an old evil returned, birthing new evils and challenges for the next generation. Co-written with i4md347h, the author of The Hunter Amongst Villains. Current Progress: VOL. 5 COMPLETED. Now available in AO3 under the pen-name OldWanderer.

this story revolve around the the Entirety of Class 1A being isekai'd into the one punch man world. story contain spoilers if your not caught up to at least chapter 318 of the MHA manga(essentially post season 6 stuff for you anime fans) so beware, beware, beware before proceeding forwards. the story will follow season two of one punch man all the way up to before the HA raid on MA

The world was incinerated. The last remnants of humanity remained to fight back, but they need help, perhaps, an otherworldly one. He is The Strongest Man of another world, a Paladin of Justice, where he is from, his mere presence comforts the masses and silences their cries. He is the strongest, greatest hero of his world, and his name is King.

izuku's dream was to be a hero but without being born with a quirk that seemed too far fetched, but thanks to space time dimensional shenanigans, his fate will change

In a world where crime doesn't exist in Japan anymore due to an organization which turns orphans into living weapons called Lycoris, because of them they where all able to stop evil, but that all chang when a Monster of Absolute Evil arrives to there world and begins conducting evil just like what he did on his world.

A sage named Mathias was the strongest Sage to exist even though he had the weakest crest, he was on a quest to get stronger ever since he killed himself in his past life for him in order to reincarnate. One day he encounters beings with powers that surpasses the strongest beings of this world.

As the Twin tails and Elemelians battle, they get a taste of how an Ominous Future is like and after this event, they are forced to work together in order to survive this Ominous Future.

As a battle with God's and humans are about they where then interrupted by two powerful beings who where sent by an Evil God from another world and during the short amount of time they have spent in this world, the gods and humans have fought as one against there for and many changes also followed during there encounter with this two powerful beings from another world.

In a world where Shadow like beings exist, another being entered this world and within a short amount of time, this being has become known as the opposite of this Shadows.

Two demigods and two Fists. When they all come together, they will change their destinies. Together. PJO x OPM fanfic. Feedback is appreciated. PM is open. Rewrite of One Punch, and a Hurricane. Pairing: Guess who

In a world where humans discriminate demons and those who take care of them, a Monster who looks like a demon from another world suddenly appeared in front of them and ever since his arrival, the world has suddenly entered a new era thanks to him.

A world where different people who reincarnated from different worlds where gathered to do one thing which was to go to school there, everyone went as smoothly as planned to the one that have sent them there, but one day its plans began to fall a part little by little when an Evil God sends two powerful beings in its world.

In a world where humans uses robots called Automata to help them fight in there war, in the final battles of the war, they where all surprised that a new threat has emerge and within a short amount of time, this threat has become a counter to there living weapons.

A world where beings with powers known as Spirits exist, many thought that they are the Gods , but one day beings from a different world mysteriously appeared and showed them how the true God's are really like and so will there universe handle the existence of this beings known as Gods.

Fate had failed. They were not the ones supposed to save the world. Zoroark was acting a role well past the credits roll; the other, a clueless, unfathomably strong and dull man, crashed into scene ignorant of the stakes. With abilities that don't match their expected roles, what could happen?

Five years ago in the day Emperor Gaz died and on that same day, a white haired female wizard also too died, but something intervened and changed the timeline into the what we know now in this story and this white haired wizard is on a quest to finding out the cause of this.