While her husband is on a long business trip, Ayane ends up working as an assistant and maid at the house of her cousin Yu, a popular female writer who has a serial in a weekly magazine. - Ayane has admired the beautiful, kind, and talented Yu since childhood, and feels happy living under the same roof as Yu. - However, there was another face to Ayane that Ayane didn't know about Yuu, whom she adored like her own sister. - On a quiet night, a sweaty Ayane, who sleeps soundly under a mosquito net without knowing anything, comes to know Yuu's true nature.