I've seen some of this as like a side couple in "out of control" also called "Never Understand" where the brown haired nerd and the bully are actually a couple.
You should try out Jazz for Two! The bullying in this series isn't as intense as I've seen in other webtoons, and there's no rape scene. The bully in this series also has a pretty complex reason behind everything he does. I think it's just what you're looking for! (▰˘◡˘▰)
I've seen some of this as like a side couple in "out of control" also called "Never Understand" where the brown haired nerd and the bully are actually a couple.
I would prefer without rape.....