Three months into her married life, young housewife Seira begins to feel the loneliness and exhaustion of being a full-time homemaker. Her relationship with her husband gradually feels less fulfilling. One day, after losing her house key, she has to wait for her husband's return by staying over at her neighbor Okura's place. Okura, who has experienced divorce, feels a strong attraction toward Seira and, overwhelmed by his emotions, takes their relationship further. Meanwhile, neighbor Sakurai is exploring a new business venture by operating a massage therapy clinic at home under limited conditions.