The Sea of Falling Ash

Sungbin, a serial philanderer and public enemy number one of the male students at his university, is confessed to by Juwon, a gloomy young man who has recently returned from a leave of absence.

Sungbin initially plays along to sate his boredom, but things start to develop into an intense relationship as Juwon's obsession deepens.

Official Translations:
English: Lezhin US, Tappytoon, Webtoon
Korean: Ridibooks, Bomtoon