A married woman who received a duplicate key was then creampied in a room where a male student was left alone.

One day, Kake, who lives alone, meets a married woman, Yuri, at a nearby izakaya. I ended up drinking with my husband and my girlfriend, who was at a loss as I shared a table... This led me to become friends with her and eventually started to develop physical relationships. Kakeru gives Yuri the duplicate key to her house, and when Yuri goes to work, she heads to the house where she puts her shopping bag in her hand. Then, as if to relieve the loneliness of passing the couple, they began to spend a lot of time in his younger room...