This was really dark, but I liked it anyway. Guy falls in love with a psycho murderer whose mother he looks like. They both die in the end
Yoon Bum, a scrawny quiet boy, has a crush on one of the most popular and handsome guys in school, Sangwoo. One day, with Yoonbum's obsession towards Sangwoo reaching its peak, Yoon Bum decides to enter Sangwoo's home. But what he saw inside was not the Sangwoo he had dreamed of.
Killing Stalking