Help me fine, pweeeease : I remember reading this web novel, where Shi Yibai (I think that was the name) appears in a dystopic world of One Punch Man, and learns some really peculiar moves like Slowest Turtle Punch, and Crab Walking Sideways, kind of moves. I remember there also being a unique Massage Technique he learnt, but for the love of me, I can't remember which novel was it. Please help me find it.
(Edited) Additionally I think he was offered choices on 2-3 graded missions by a system, and got rewards based for it. The hero is also kind of idiotic, but smart I think iirc, and posessing grit.