While her husband was on a long business trip, Ayane decided to work as an assistant and helper at Yu's house, a cousin of a popular female writer who has a serialization in a weekly magazine. Yuu, who is beautiful, kind and full of talent, has admired her since she was young, and Ayane feels happy living under the same roof with her. However, there was another face that Ayane didn't know about Yu, whom she adored like her real sister. In her quiet night, a sweaty Ayane, who sleeps soundly under her mosquito net without knowing anything, comes to know her true nature.
