One Punch Y/n! (Autistic MC X OPM Harem)

Y/n L/n was Once A Teen who was Just doing his thing until he Beat A Crabmonster he realized he always wanted to be A Hero, so he Trained with Huge weights, Huge rocks, and intense Training every day in exponentially strong amounts until he became so strong he can beat almost anyone in one Punch!
The Only Problem now is Finding A Strong enough Opponent.