Tsugumi Dozono (Nana Eikura) works at a large electronics company in Tokyo. She likes to spend long vacations at her grandmother�s house in the countryside. One day, her grandmother passes away and Tsugumi Dozono decides to live in her grandmother’s house while working from home. She finds a strange middle-aged man in the house. The man’s name is Jun Kaieda (Etsushi Toyokawa). Jun Kaieda tells Tsugumi that he is her grandmother�s ex-student and her grandmother gave him a key to the annex house. Tsugumi, who does not know the exact relationship between her grandmother and Jun, begins to live with him.