On a weekday afternoon, the uniformed beautiful girl Yuka sits alone by the station flowerbed. She was the ace pitcher of a strong softball school but became isolated after her mistake cost them the prefectural tournament. A seemingly kind "former teacher" uncle approaches her. He listens to her troubles kindly... but his "justice" gradually twists. "I need to teach you with my body!" Taking advantage of the girl's weakness, this is neither education nor love — just pure lust...