Comment by Aiko on December - Chapter 17

I believe it was the guy who abused yeonwoo when they were dating but I'm not 100% sure on that.

The red head is the guy that just beat the kid up that gave Alpha Kim the info on the guy he just snatched his teeth out.

Menstrual head is a loser rich kid who was told by his dad to get close to Kim Shin because Shin's from a rich family and that can help menstrual head along the way, but he's failing at that. So he's digging around Kim Shin and was pulled into this mess