One-Punch Man was quite a bit of fun in its first volume, featuring Saitama, a young man who becomes a hero for fun but doesn’t have much because he is so phenomenally strong he wins every fight with literally one punch.
Will that sort of general fun continue in volume two?
Oh hell yeah.
Saitama now has a cyborg apprentice, and during the course of this volume, he goes up against the House of Evolution looking to make Saitama a lab rat, and then he gains what looks like an archenemy in the form of a superfast ninja with a stupid name, Speed O’Sound-Sonic. Saitama is still bored, and his two biggest problems are no one believes him when he tells them the secret of his strength and no one really knows who he is after three years of being a hero.
One-Punch Man is still just a fun book that mocks the tropes of the hero genre. There’s probably a lot of Japanese culture in there, but the series works well enough if you’re only really familiar with how American superhero stories work. As such, let’s say 9.5 out of 10 candy thief monsters.