A 44-year-old married woman lives alone with her daughter, Miyuki, after her husband is transferred for work. She gets caught secretly listening to her daughter's sex life, and the mother-daughter relationship begins to gradually break down. Though she once had a lesbian relationship in her youth, she now struggles with growing maternal feelings. As the distance between mother and daughter closes, complex emotions buried deep within her heart begin to surface. The story portrays an everyday life entangled with family bonds and anxiety toward her daughter's coming of age.