This is the best black comedy I've ever seen in fiction.
This manga is a mix of everything- gore, comedy, rough sex, gunfights, martial arts, mafia, prostitution, experiments on people...
The story starts slowly, I think mangaka tried to identify the ground of his work. So we have a slow mafia-like start with yakuza identifying some shady buisness. The first volume introduces characters and setting. Aaand from the second volume onwards it is a hard ride without stopping.
The best thing is definitely the addition of comedy elements. It's mostly satyrical, for example we have a lady who works as a torturer for yakuza. She like to workout because she wants to be in shape. And how she does it? Riding on the electricity-making bike connected to the poor victim, stretching with rubbers connected to his skin via sharp metal spikes etc. You know, healthy lifestyle is important!
Sounds terrible? Yeah, it is gruesome... but it's so funny when you actually look at it. Add to this a mixture of interesting characters, catching story and awesome fights.
I honestly recommend it to everyone who wants something on a higher note with brutality and not cringy at the same time. That's why this work is so awesome. We don't have cringy badass characters. We have a lot of idiots. And badass killing machine women who are at the wrong place, at the wrong time.