After a series of 10's, I decided the public deserves a review by someone who is over the age of 14.
Story (3/10)
The beautiful thing about this manga is that the 95% of it can be explained in the following paragraph.
Me main character. Me like boobs. Me use chainsaw to kill demons. Vroom Vroom. Me have other friends who help me kill demons.
That's it. The ending throws an expected twist that really added nothing to the story, which is a shame considering the Gun Demon and Hell Arc are 1000 times better than that ending.
Art (8/10)
I'd say it was really good. Couple of panels were really messy, it was hard to tell what was what. But other than that, important moments are done well.
Character (1/10)
Easily the worst part of it. As I said, main guy likes tits and sweets, and that's the end of his depth. Supporting cast was done weak and shallow. Makima is a poor mans Aizen. And I mean, really poor mans.
Overall (5/10)
This manga is essentially the same as Kimetsu no Yaiba. Are you 14, is this your first manga, and do you think tits, blood and characters screaming and transforming is the coolest thing ever? You'll like it. No? Then you won't.