Colorize

Back in high school, there was always a peculiar and subtle tension between Yoo-Sung and Gun-Ha. After losing contact with Gun-Ha, Yoo-Sung moved on, becoming an actor and trying to put the past behind him. However, when a stalker begins threatening Yoo-Sung, his agency brings in Gun-Ha as his personal bodyguard to protect their star. Now, Yoo-Sung is forced to confront Gun-Ha, along with the lingering past and unresolved emotions that still hang between them...
(Source: Lezhin US)
Note: Chapter count includes a prologue.