Hatsukawa Minami, a shy sister who hasn't had a boyfriend in five years, finally decides to embrace her femininity when someone catches her interest. Eager to impress, she shows off a new dress and a thong she bought specially, but the outfit accentuates her chest and hips so much that he becomes uncontrollably aroused. Before she realizes it, he's lost all restraint, groping her body and forcefully thrusting his cock inside her, creampie after creampie. From that moment on, her long-suppressed desires awaken, and she begins relentlessly craving his cock, begging for it over and over again.