Megumi Oshima, a married woman who has lived an upright life, has been working part-time at a supermarket. However, after over 20 years of marital sexlessness, she finds herself deeply troubled and finally decides to confront her true self. She chooses to take action in order to discover a different side of herself—one beyond years of restraint and suppression. Her bold steps lead her toward an unexpectedly erotic journey. This transformation is not merely about sex; it becomes a gateway to a new chapter in her life.