that should be a japanese manga dude. iirc its about a gambler. could be wrong, its been a while since ive read it. Edit: ignore, Im confusing it with another work.
I also remember it as a japanese work because man in cover almost look same as cover of japanese novel.But app says its a manhua.
the original title (non translated) is 神在人间 , it's not japanese. can't find any novel version of it on NU though. Maybe its up under a completely different title, or maybe the novel just isn't being translated (if there is one)?
thats what confused me. I remember the dude with that same afro in his underwear scratching himself and contemplating on how to use the last of his money in his small tatami floor apartment while eating cup noodles. I could be confusing it with akagi though as I also started reading that around the same time.