Baesinui Muge

Gong Seok-Hyun is the boss of the Baekho Organization. Cha Moo-Young was its executive and has been loyal to the group since childhood. He was also Seok-Hyun's lover. But suddenly Moo-Young betrays the group and moves to the Viper Faction. Seok-Hyun thinks of finding him and killing him. But then changes his mind as he can’t give up on his beloved Moo-Young, so he secretly meets with him. As he deepens his relationship with him, he tries to find out the truth behind Moo-Young’s mysterious actions.

(Source: Bomtoon, translated)