Some of the background items (buildings, coffee mugs, etc.) look like they are taken from stock photos or something, at times 3D. It's a pet peeve of mine when they mix 2D art with 3D art, and consequently when it's obvious that the artist cut corners. That being said, Seyoung is absolutely adorable and the nudity is drawn well. And this manga is basically hentai, soooo I'm not sure how much the buildings or coffee mugs really matter.
The main fetish in this manga is uncontainable horniness and public masturbation/sex. And dripping vaginal juices. Up until chapter 28, I would rate it as maybe an 8/10. After that, it becomes less interesting because there's less tension. Probably to make up for that, they start to include include some experimentation with degradation, anal play, and urination. And to keep the story going, they have to make the characters basically become complete dullards unable to recognize when other people are interested in them.
Are we just going to pretend that chapter 51 didn't happen? Did Jinwoo ever tell Seyoung about that incident? Or is he being a moldstain about it?