A man orders an outcall escort who is not supposed to provide intercourse, only to find his quiet office coworker Kisaki at the door. As she panics and begs him to request another woman, he decides to exploit her secret and make her his busty pet. He devours the enormous breasts hidden beneath her plain clothes, extends the appointment, fucks her bareback, and creampies her as deeply as he can. Her sobbing only excites his twisted desires, and from that day he begins training her as his sex slave.