Kimetsu no Yaiba
Love it!!! Too fast-paced though...
The secret life of the demon king
Solo Leveling
Ok, so I've only just read Chapter 1 (lol), and I've got this theory that the reason he was weak in the first place is because of his skill. I guess every hunter has a specific skill, yes? I bet his skill is actually that "level-up" thingy, and of course, he starts with level 0 or 1, explaining why he was so weak at the very beginning. Well, these are only my suspicions. And yeps, made this theory despite all the holes hahaha Edit: Lolz, guess not. Plus, it's so frustrating that he won't be able to get all the credits he deserves for saving the world, ughhh. I love overpowered characters, and I want them fucking recognized! P.S. I just finished it and I want to reread it again. Damn.
Jujutsu Kaisen