Long before the start of what would become the story known as One-Punch Man, someone ended up within the world and has gone on to have his own adventures. Now with the 'story' about to start he attempts to guide the main players from the sidelines until such a time as they might need his assisstance. Unfortunatley as with most plans things don't go accordingly for long.

After a brush with near-death, Tatsumaki realizes she cannot be the pillar of hope the people need. For the first time in a long time, she is afraid. The only one who can save her from that fear doesn't understand the concept of responsibility. There's more to hero work than a good fight and more to bravery than strength alone. The world needs a true hero, but what does that mean?

Saitama sabía que la traición era algo difícil de soportar, pero nunca se imaginó lo doloroso que podría llegar a ser cuando provenía de la persona que amas. Él nunca imaginó que Fubuki le haría algo así.

Saitama seguía esperando que su rival milagroso apareciera, para darle algo de emoción a su vida. Pero si Mahoma no va a la montaña, la montaña va a Mahoma. El héroe Caped Baldy tendrá que crear a su propio rival si quiere tener uno. En ese momento, vio a su alumno cyborg... y una idea brillante llegó a su mente calva. ¿Por qué no fundar una escuela?

You all know the thoroughly disproven theory that Blast is a future version of Saitama. But what if instead Saitama really was Blast? Basically he's older and does all the stuff we know Blast did, except the Cube and God shit. No idea whats up with that so I'm not touching it.

Saitama and Tatsumaki: two completely different people, who both have odd lifestyles. Neither of them really know why they hangout, but they do. Both of them harbor their own issues. Tornado with her past and present relationships, and Saitama with his strength/emotions. Maybe it'll work out.

continuacion de la carta, un mes despues de recibir la carta sitama se empieza a sentir extraño , enntonces le pide ayuda a fubuki, pero su hermana empieza a entrometerse sitamaxfubukixtatsumaki

Just when Saitama was doled out enough points to become S Rank he wakes up in another world full of monsters, magic, and kings. How will he adjust in this new world?

No importa con cuántos chicos intente salir Fubuki, Saitama es el único que consigue hacer latir su corazón. Fubuki ha llegado a la conclusión de que sólo hay dos tipos de hombres: Saitama y todos los demás.

Chapter 168 tag with associated manga spoilers.

La ruta que debian encontrar las estrellas era algo indeciso, pues resplandecían todo lo que era posible… hasta que estaban destinadas a desaparecer. Su vida era efimera y bien podian dejar de existir en cualquier instante, es de tal modo que no se espera por encontrar algo, cuyo valor sea aún mayor... que el deseo de continuar resplandeciendo en el cielo nocturno. GenosXOC / Het.

Ambos eran dos almas acostumbradas a la soledad, conscientes de que la confianza es algo difícil de encontrar. Envueltos en sus propósitos, uno busca la paz y el otro proteger a los desvalidos. Aunque buscan lo mismo, el camino de ambos era completamente distinto. Pero las posibilidades de ambos eran tan infinitas... como las estrellas en el cielo que veían al anochecer. GarouxOC

After being guided by a prophecy delivered by an ancient seer, Lady Boros Dominator of The Universe has come seeking a champion that is capable of surpassing her might, but what she finds waiting for her at her journey's end is far more than she could have foreseen, not that that's a bad thing of course.

Él es un héroe, su nombre es Saitama y de vez en cuando se aparece en el restaurante en el que trabajas de mesera. Darte cuenta que en verdad te gusta este hombre es lo que te motiva a intentar acercártele, incluso si la interacción más cercana que has tenido con él fue aquella vez que te pidió ayuda para encontrar una papa frita que le faltaba a su plato. (NO es rayita)

Tatsumaki faces a wave of different feelings after the Monster Association arc. Chapter 11 - Here's a therapeutic benefit from the mud that Cyborg didn't expect

Saitama ha caído en un sueño profundo y ninguna cosa lo ha podido despertar, Fubuki está dispuesta a salvarlo a toda costa siguiendo su plan, pero, ¿cómo podrá lograrlo en un mundo donde sólo existen ellos dos? Sin querer, Fubuki termina volviéndose parte del problema.

She once crushed on and wrote fanfiction involving him. He saved her because she was the only likable character in a manga he read. They hadn't anticipated knowing each other or becoming celebrities overnight. Fighting monsters for humanity's sake sure didn't help. - Reverse isekai. Has many original characters due to the setting. -

A novelization of the recent events of chapter 166 of One Punch Man! (a One Shot!)

Parker Kirby, is a cab-driver for the denizens and a man with the face of yakuza thug; working his shift despite the dangers of monsters in M-City. However, after an accident with mutagen that granted him superhuman hair powers, the youth decided to use his powers to aid his fellow civilians that are ignored by the elite.

This is the story of a new hero joining Saitama and Genos on their adventures. This story focuses on his experience of climbing his way through the ranks of the Hero Association alongside these two powerful heroes. Please feel free to criticize.(Major changes to the story don't begin until the end of season 1's events).

Miyu is the definition of "cute and innocent", but she's determined to become a hero and show the world how strong she can be. With a bodyguard lurking in the shadows, she sets off on her journey to try to make her dream come true. Meeting her idol might be a little disappointing and his student might be scary, but she won't be discouraged.

"A veces Genos deseaba tenerla entre sus brazos para aplastarla, hacerla trizas e incinerar cada parte de ella sin piedad; hacerla aferrarse a él o él aferrarse a ella y no dejarla ir a ningún otro lado, distanciarla completamente del mundo, especialmente de Saitama..."

We’ve seen it a time and time again. A guy gets isekai’d, gets powers and then hails as a hero in another world before defeating the evil force and saving humanity. But this time, it wasn’t an ordinary man, it was Saitama the caped baldy. Join him and his group to find out what happens when fighting monsters replaced to fighting evil dictators, jealous men and his boredom.

Krysta Nikihasha is the second-born heir set to inherit the wealth of her family, who is connected with the Hero Association, and she's always been classed as the "perfect daughter". But one fateful night, a ninja outlaw steals away her heart, and Krysta starts to wonder whether this forbidden love is destiny, or something that pairs excitement with danger. Also on Wattpad and Ao3

After surviving an epic smack, the Mosquito Girl is back. But her return is not quite as she was, and her future is about as clear as fuzz. So directed away from causing strife, she is sent to find a new track in life. Knowing little she seizes a new place, leaving the recipient wheezing in the face. Starting with such a weird bend, who can really say how it could end? AU