One day, Nakano, a job-hunting student living alone, falls in love at first sight with Mari, a housewife he meets at a local izakaya. They then meet again by chance, exchange contact information, and end up drinking at his house. Their relationship deepens. Nakano gives Mari a spare key, and when Mari's husband goes to work, she heads to Nakano's house with a shopping bag in hand. They spend a lot of time together, trying to ease the loneliness of not being paid any attention by her husband, but when Nakano finds employment, their relationship begins to change...