Sangwoo's character analysis [Killing Stalking]

This is a deep analysis of Sangwoo's character in the Killing Stalking manhwa by Koogi. Sangwoo is a pretty complex character, and as I studied psychology, criminology and sexology in college, he was a big challenge for me, but this is why I found him so interesting. This analysis will (at the best of my knowledge) expose the situation of Sangwoo in a psychological view, trying to explain why he became what he became. Also, it will traces the story step by step by chronological order, pin point specific moments and period that led to Sangwoo's character development and what could explain his behaviors towards Yoon Bum and their complex relationship.