The Ren of the university student of the single life needs her of the Senior, the assistant professor Yuuri of the university in Tokyo. In summer vacation, the Ren goes home with Yuuri. Elderly Sister, the Yuu which meets two people joyfully. There was the person who wanted to meet by all means in Ren. Be the Yuria of the childhood friend of the Elderly Sister. Be more intense, and the Yuuri which is jealous of the Ren which asks Yuu Yuria frequently demands a body of the Ren in the evening. The Ren suppresses a voice while minding the Elderly Sister which is in the neighboring room, and be in agony. On the next morning, Yuria comes over. The Yuuri which stares at Yuria and Ren, it which meet each other…. Four women who go while being seized with jealousy and greed.
