One day, Yuzuru, who lives alone, meets Tsumugi, a married woman stranded in the neighborhood. When she breaks down and is at a loss, Yuzuru helps her out, and the two of them become friends... As their relationship progresses, it deepens. Yuzuru gives Tsumugi a spare key, and Tsumugi also begins to head to Yuzuru's house with a shopping bag in hand when her husband goes to work. To ease the loneliness of their misunderstanding, the couple begins to spend a lot of time together in Yuzuru's room...