Venus Puts Fur on Me.

Vol.5 Chapter 52: Aoyama-san vs. Spot
Vol.5 Chapter 51: Aoyama-san's Devotion
Vol.5 Chapter 53: Bullying Satcho Alliance
Vol.5 Chapter 51: Aoyama-san's Devotion
Vol.5 Chapter 53: Bullying Satcho Alliance
[It is not just "bullying."] Nakajima was ruling over the class as a "bully." The subject of bullying is a fragile girl, Shirasaki-san. Going as far as violence, every day was horrible. Everyone in the class pretends to not see it. If they stop, then they will be the next target. Nakajima performs "bullying" as if possessed. It was clear that something was wrong. Why does he do such brutal acts? The reality is terrible—