Sub-sama, Jouzu ni Hizamazukemasuka?

University student Fuwa Hiroki is a closet sub. One day, he is assigned by his older brother, who runs a revenge agency, to a young Dom named Shishido Sen as his guard. "Damn, it's your first play? That's exciting." Hiroki is drowning in Shishido's non-stop commands. Hiroki thinks he will be forced to be in a play with Shishido, but Shishido does...