After failing his college entrance exams and being forced into his second year of ronin status, Tetsuro's father grows concerned about his future. He asks Riko, the wife of his former colleague and a former private tutor, to help guide him. Riko gladly accepts, but soon struggles to find a way to motivate the apathetic Tetsuro. One day, she comes up with a bold plan—using her alluring body to seduce him and spark his interest. The strategy works instantly, transforming Tetsuro's attitude and igniting a newfound passion for studying. As their sessions grow increasingly intimate, an intense, passionate bond develops between them, far beyond mere teacher and student.