A pretty big reason why I enjoyed this manga is because it manages to have quick pacing while not compromising on the over all story. Fujimoto can show how characters are feeling in a more realistic and laid-back way, no over the top crying and no 10 chapter grieving arc. Not that these tropes are necessarily that bad, but its a breath of fresh air to see the characters move on from loss in a more quiet way.

How the main character Denji's understanding of love and intimacy develops over the course of the manga is great. First he has a very juvenile goal of just "wanting to touch some boobs." Later when he achieves this goal he feels empty, turns out simply touching boobs isn't what he thought it would be, what he really wants is to be close with someone he cares about. At one point Denji even turns down sex not because he doesn't want to have it, but because he wants his first time to be with someone he cares about.

This manga is can also be very bizarre and genuinely hilarious at times. Be it a weird spontaneous joke, or a continuing gag, I found it funny to some degree and usually I'm not a fan of Shonen humor so I guess that's saying something.

As far as the art is concerned it can be a bit rough every once in a while, but in the big moments the art is really great. The characters anatomy is on point and character design is also good too, despite most characters just wearing suits. But where the art shines most of all is with the devils. Fujimoto can draw some seriously badass, terrifying or both demon designs. Also Fujimoto can draw some really cute girls so that's always a plus.

The final antagonist's build up, reveal and defeat where great. Fujimoto does a great job foreshadowing their eventual betrayal of the main characters. The antagonist's power, once revealed, recontextualizes all of their interactions with the other characters thought out the manga, making rereading it a lot more interesting.

A problem I had with the manga was the ending was a bit abrupt. Maybe I was just sad to see the story end but I feel there could have been a bit more to how the final antagonist was defeated.

Yeah so overall really great, exited for part 2, also the anime adaptation.