Hinako lives peacefully with her fiancé while running a café, until a class reunion brings her face-to-face with the ex who once trained her as his sex slave. She thinks marriage has ended their connection, but her body still remembers him. He suddenly forces her into deep throat training beside their former classmates, then she lies about attending an after-party and follows him to a hotel. There he reasserts control through choking, hard sex, massive squirting, and merciless creampies. Overwhelmed until she nearly blacks out, the memories of being his sexual toilet return, and ordinary life is no longer possible.