[ENGLISH-SUBTITLE] JUQ-541 A married woman who received a duplicate key lived alone in a room where

One day, Yuzuru, who lives alone, meets Tsumugi, a married woman stuck in his neighborhood. Yuzuru saves her when her bicycle breaks and becomes friends with her... As the relationship progresses, the relationship between the two deepens. Yuzuru gave Tsumugi a duplicate key, and when her husband left for work, Tsumugi started heading to Yuzuru's house with a shopping bag in hand. Then, as if to relieve the loneliness of the couple's misunderstanding, they begin to spend a lot of time together in Yuzuru's room...