Beast

Jeon Doo-in's relationship with Baek Ryong is complicated. He gets paid by Ryong to do dirty jobs, which is standard fare for a thug like him. The fact that they have sex together doesn't make things that messy, either. The part where everything gets complicated is the fact that Doo-in doesn't really want any kind of relationship with Ryong in the first place. Doo-in isn't the type of man to be domesticated, and Ryong likes him that way... but he doesn't want to let his "beast" go, either.

(Source: Lezhin Comics)