Midori Maki is 52 years old, a housewife with 30 years of marriage behind her. She thought she was happily living with her husband and son, a family of three. But over time, her husband changed from a domineering patriarch to emotionally distant and indifferent. Conversations became rare, and even her private moments of self-pleasure grew infrequent. Then one day, Midori discovers her son wearing her underwear. She instantly erupts in anger. Yet, regret soon follows as she realizes she scolded her beloved son too harshly, prompting her to reflect and change her heart. A story of shifting family bonds and forbidden desire.