One day, when Sarasa returns home, she is attacked in her room by a strange man. When she regains consciousness, she finds herself in an unfamiliar place. From that moment on, her body is thrust into a life of confinement as a slave. Bound, imprisoned, and subjected to relentless training, her resistance gradually turns into moans of pleasure. Slowly, her eyes grow moist with arousal as Sarasa awakens to the consciousness of a slave—but her ordeal has only just begun.