One Punch Man: The Heroes Challenge

 In the first chapter of this story Saitama remembers what it was like to fight and feel the thrill of fighting. Saitama is an invincible hero who can end any battle in 1 punch yet he's unsatisfied with this. He no longer has the thrill that he once had when he was first fighting monsters and so Saitama looks everywhere for a possible monster that can challenge him yet no worthy opponent appeared. So with his frustrations Saitama goes back to sleep in his little apartment. In the next chapter I predict that perhaps Saitama will find some fulfilment in  something else other then fighting perhaps and maybe he won't be so apathetic anymore.