Manga: in a Strange World, the White-Haired Boxing Champion Fights Through the Abyss

In the post-weird era, others have awakened their powers to ascend to heaven and earth, while I am left with only brute strength and two legs. In order to earn assessment fees, he broke into the underground black boxing industry and smashed the C-level weird head with one punch. Is the law firm pursuing me for employment? Sorry, I just want to make the ring a no-go area first.