One interesting fanfiction could be where Saitama from OPM ends up in the world of Attack on Titan. He might just casually punch a Titan's head off with one blow, completely changing the dynamic of the fight against the Titans. It would be a hilarious yet action - packed story.
The only man who could accept Saitama's serious punches and not die was Luo Ren. If you like this type of novel, I recommend you the following: One Punch: Supermarket Selling Man, One Punch: 50/50, One Punch: Superman Revealer. I hope you like my recommendation. Muah ~
The comic delves into themes of identity, reality, and the nature of good and evil. The story follows characters on a journey of self-discovery in a strange and mysterious world.
Yes, the OPM manga has come to an end. The creators completed the narrative, providing closure to the fans. Although some might have hoped for more, what was presented was a comprehensive and conclusive tale.
One idea could be Saitama facing an enemy that can copy his strength but not his speed. This would create a unique dynamic as Saitama has to use his wits more than just his punch. Another plot could involve Saitama traveling to a different dimension where his power is nullified and he has to start from scratch to regain his strength. And perhaps a plot where Saitama has to train a new hero who is having trouble controlling their own power, similar to how he was once a regular person trying to become strong.