The strong-willed career woman "Yamase" is in a tense mood as she has an important business meeting. To make matters worse, the taxi she called is late and stuck in traffic, and she can't stand the driver's muttering. To top it off, the fare is high, and it's just one thing after another... The taxi driver, finally losing his patience with Yamase, who impulsively threw money at him in frustration, suddenly accelerated the taxi and parked it in a deserted alley. When he attacks Yamase in the back seat, he strips off her clothes, secretly films her in a pathetic state, and plays with her lower body... Yamase, who jumped out of the taxi and fled to a nearby building, was pinned down by the man in a dimly lit dead-end underground staircase, and was cruelly raped... When Yamase, who had fainted from the abuse, woke up, she was in that man's room. The neurotic man carefully untied Yamase, who was tightly bound, and then ejaculated in her mouth, forcibly making her swallow it to satisfy his sexual desire. Yamase, who was forced to endure the perverted man's bad taste of teasing her by stopping the massager just before she cummed while exposing her 'J-cup' huge breasts in lingerie that was more embarrassing than being naked, went into a mental breakdown as if she were a different person... Every day, Yamase is subjected to cruel training by the man, and as she becomes more and more insane, she transforms into a female dog writhing in agony as she rides the man with her bound, helpless body, inserting and removing his weapon-like huge dick and creampieing... Yamase, who has fallen into a body that cannot live without this man's dick, is driven mad by the huge dick and her life collapses happily!!