Living with her new husband and his stepson, Yoshi-o, Asakura Ayane's life takes a dark turn when a chance incident provokes Yoshi-o's rage, leading him to violently assault her. Amidst the pain, she finds herself unable to resist his touch and, in a moment of desperation, is forced to utter the words, "I want your cock." Shaken to her core and seeking escape from loneliness and suffering, she begins to submit to Yoshi-o and his friends, descending into a life as a sex slave. As her ordeal progresses, her heart slowly transforms, awakening to disturbing new desires.