What if Saitama has a biological sister?
  • Reads 3,173
  • Votes 143
  • Parts 12
  • Time 1h 27m
  • Reads 3,173
  • Votes 143
  • Parts 12
  • Time 1h 27m
Ongoing, First published Apr 16, 2024
Non-canon Story of One Punch Man universe, a 21 year old woman named "Nancy" was a number 1 class S hero of the City-U. Retiring and trying to visit her Big Bro in the City-Z in his located apartment.

Nancy comes to visit Saitama once in a while when she found her big brother becoming bald and becoming insanely strong that he can one punch any foes.
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21 parts Complete

Saitama - A hero for fun who has inhuman physical abilities and can defeat enemies with ONE PUUUUUNCH. Genos - A hot, edgy cyborg that can shoot lasers and fire. Y/n - A sadistic hero with powers that she legally should not have. With abilities to manipulate living, sentient beings, throw shit around with your mind, and every kind of badass psionic power, that granted you to becoming a Dragon-level threat! Wanna know the best part? You are a cruel piece of shit always looking to make someone deserving of it scream. Whenever there's a fight, you waste no time in showing brutality. When Saitama gained his inhuman physical powers, you and him accidentally crossed paths, which led to a fight. You won. Now, at every chance he gets, he tries to fight you, or asks. He offered you to share his apartment because why the hell not, he's bored, and you're strong, do the math. You accepted because yes. You may be a hero, but something from your past is holding you back, and your alliances turn fickle when a chance of freedom turns up. #1 in genos Highest Ranking #1 in saitama Highest Ranking #1 in onepunch Highest Ranking (I own nothing!) (Everything and everyone belongs to their rightful owner!) (I only own the plot and my OC's!) (You own yourself!) (Warning!: Blood, cursing, gore!!)