It is kinda odd. First, we are presented with an Ice Queen, typical, but her personality changed so much in various ways in just 20 chapters, I got lost. The hero is not deep either. Typical weak guy. He even considers entering pro boxing just so he can understand the girl better, how shallow can you get?
The "villains" are worse. Think of a thug, the most common one, from high school. That is all you get. Motivation? In story it would be "to set things straight", "you think you can be with this grill?", "oh, you think you so strong mate?" and the kind. Of course it is just pretext so the author can show some good action scenes.
The relationships are lacking. There is no building trust. The first time the girl meets the guy, she is already "oh, there you are, buy me this to drink, would ya?", and he, being the beta he is, is just "wh- what? oh, ok. anything else, master?". There is no development because it already developed instantaneously to a evolved stage relationship, with no apparent reason.