It is one punch man with a hint of isekai
A little bit on the art but not funny..maybe at the first chapter like a little smile but atter that, it's bad
If they're trying to be funny then it is annoying because it clearly doesn't work, the running gag of him being powerful and teaching these side characters that doesn't have any interesting personality whatsover and even though he is saying something simple enough is so ..every time they act...