Ami Takashima, a young married woman, harbors a secret from her husband. She once became romantically involved with her brother-in-law while living together, and now he blackmails her with photos from that time, forcing her to live as his possession. The day after a creampie session with her husband, her brother-in-law puts a collar around her neck and humiliates her by forcing her to masturbate. Her entire body is licked, she's tormented by aggressive intimacy, restrained and played with using toys, brought to the edge repeatedly and denied release, climaxing over and over. Unable to endure his rough sex, she soon begins grinding her hips on her own, seeking pleasure like an insatiable bitch, surrendering her body completely. The pleasure she experiences throughout this process transforms her into a being utterly dominated by him.