
Well tbh, I don't think it's fair to deliberately read a manga with this kind of cover, title, genres and tags, and then complain about the lack of story XD The manga lived up to exactly what it promoted. That's the case with most manga, and yet people always find something to complain about, usually about stuff that was already tagged to begin with. It's like watching Jaws and then complaining about the fact that people keep getting attacked by a shark.

It delivered smut, which was all it promised. If people are dissatisfied, it's their own fault for having high expectations about a manga that's no more than some dick on dick action. If people want to read manga about yakuza with an actual plot, avoid the smut tag. I'm just saying it like it is, but you're entitled to your own opinion.
If people showed the same kind of passion about manga they actually like as about the ones they hate (and somehow still finish it), life would be awesome.