This is a Book Cover of how Y/n aka SMG5, Mario and Luigi end up in the world of One Punch Man along with the Caped Baldy himself, Saitama aka One Punch Man.

How this happened is when Y/n and Mario were just hanging out until they encountered a couple of monsters that beaten them both up in a near death experience as they both tried to fight back, but they were too weak to defeat them.

However, just as they are about to die at the hands of the monsters, they were both saved by a caped baldy that take out the two monsters with just one punch.

That caused the comedic duo to train themselves to the bone by doing 100 push-ups, sit-ups, squats, and do a 10 kilometer run every single day as they both attempted to do Saitama's intense training regimen to become just as strong as him.

Eventually, the two of them managed to achieve the power they've been seeking and had become just as strong as Saitama as they both started saving people from whatever kind of threat that lurk around Creation City.

Then one day when they saved Luigi from a monster that tried to steal his stuff, Y/n and Mario saved him with their newfound strength and Luigi begged them to teach him on how to be strong like them, which took some convincing to teach him on how to be strong like them and eventually Luigi got the same treatment and became strong like them and calls himself, One Jump Man.

Then suddenly, the three of them got sucked into an inter-dimensional portal created by the Number One hero known as Blast and found themselves in the world of One Punch Man.

So then, the three of them decided to live in a separate apartment in City Z, which is right next to Saitama's Apartment and eventually the caped baldy became fast friends with the trio and worked together to fight monsters to protect the people around them and make it to the nearest sales at the supermarket.

Soon after they defeated some monsters at a place called House of Evolution and joined an organization known as the Hero Association, where they work for them to save the innocent from the wicked and perform some heroic duties to rise up to the big leagues to become S Class Heroes.

They even managed to meet other heroes in the Hero Association like Saitama's official disciple, Genos aka the Demon Cyborg, King, Flashy Flash, Child Emperor, Silver Fang, Mumen Rider, Hellish Blizzard, Terrible Tornado, Atomic Samurai, etc.

Eventually, the three of them including Saitama started taking on bigger threats like dealing with Boros the Dominator of the Universe, the Monster Association, and the Hero Hunter, Garou.

Not to mention that after gaining some popularity as heroes that somehow got the attention of other heroes like Hellish Blizzard and her group called the Blizzard Bunch that tried to get Y/n, Mario, Luigi and Saitama to join her group (reminding of a certain someone from Inkopolis that had the same motive to make Y/n and Mario join a gang because of their creative skills) or when Flashy Flash tried to asking Y/n, Mario and Saitama to look for a certain monster and become his disciple, which also resulted in slamming the door in his face and not remembering his name or when they soon found OPM versions of the Nintendo characters including a DBZ version of Shaggy that became fast friends with the gang after a fighting tournament along with dealing with a more Dangerous version of Waluigi.

What kind of adventure will the gang face off next as the Heroes that Nobody Ever Knows.

This is based on the One Punch Man Series as well as the video game, One Punch Man: A Hero Nobody Knows and the One Punch Man Mashed Parodies, One Jump Man and One Jump Man Vs. Shaggy Ball Z.

Your Hero Outfit:

Mario and Luigi in the OPM Universe: