Killing Stalking (블랙 헤이즈) is a Manhwa written and drawn by Koogi.
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.
For more information on the series see: