Yuki, an adult college student living alone, meets married Nao at a neighborhood pub after she has argued with her husband and has nowhere to go. Sharing drinks brings them closer, and before long they begin sleeping together. Yuki gives her a spare key, and whenever her husband leaves for work, Nao starts visiting with groceries in hand. In her younger lover's apartment, she spends intimate hours escaping the loneliness of her failing marriage.