I think I read enough of this to get a general idea of what this story is like. Want to read a typical shoujo story with a questionable foundation? Well, this is the read for you!
Defying Kursosaki-Kun is about Yuu who likes Shirakawa, but ends up pissing off Kurosaki, his best friend by causing trouble at the dorms. Kurosaki decides that he wants to discipline Yu by kissing her and the story progresses from there.
A typical story where a girl falls in love with an asshole guy who is constantly kissing her when she doesn't want to. She falls in love with him because she sees that he isn't as bad as she thought he was. The plot pushes this narrative of having a girl fall in love with a guy who has no respect for her boundaries. But it's ok because he has a somewhat sad backstory and he gets character development? Seriously speaking, it's a pretty weak start to a romance story that gets drawn out by other characters that don't add too much to the story.
Let's talk about the characters starting with Yu. She's your average high school girl, not a crybaby but not a super-strong character either. She claims she likes Shirakawa, but she also doesn't hate it when Kurosaki forces himself on her? There should be no reason why she falls in love with Kurosaki considering all he does is wanting to torment her. In other words, she doesn't hate the fact that he is taking an interest in him.
Kurosaki-Kun is your typical bad boy character who develops an interest in Yu after their first encounter. He claims that he's keeping her in check with all his actions and enjoys making her cry. He is extremely possessive of her even though he claims he doesn't like her.
Shirakawa is a character that appears to be nice to other people, but in fact, acts for his own interests. He dates Yu not because he likes her, but because he wants to not change the relationship between him and Kurosaki. He uses people for his own benefit.
If you can ignore the problematic aspects of each character in the beginning then you get a typical shoujo story. The characters do go through development as the story goes on.
The art is fine and suitable for the story. It does improve as the story progresses which is always nice. Nothing about the art really stands out like with most shoujo/romance stories, just that it's pretty and is able to show emotions well.
Overall, this is a typical shoujo that appeals to certain types of readers to get a fantasy that they want. There are better romance stories out there and the story feels too drawn out for what it is. If you do decide to read it, don't set your expectations high because you will be disappointed. This is a 5/10 for me.
Would I continue reading it? No.
Do I recommend it? Only if you like possessive ML/tsundere guys.