Ten years into her marriage, Maki finds her relationship with her husband has grown cold, leaving her daily life dull and unfulfilling. Her only pleasure comes from calling men she once shared a night with, reminiscing about the past while masturbating. One day, her stepfather, who had stormed out after a fight with her stepmother, shows up at her door. It's still early in the day, but he brings sake as a gift. As they drink together, the alcohol loosens their inhibitions, deepening their conversation and increasing physical intimacy. Though Maki initially resists, she eventually gives in to her stepfather's persistent advances, surrendering herself to his warmth.