Yian’s Binding by Ding Dong

Yian’s Binding Manhwa Plot: Agent Benjamin is captured while tracking down the prime suspect, mafia boss Yian. Waking up in an inescapable room filled with torture devices, Benjamin, who refuses to give in even after endless torture, stays by Yian’s side and tries to uncover the secrets of the drug organization.
Warning: Hardcore BDSM Manhwa.