Yuya, went to live with relatives in Tokyo, in order to attend the graduate school. The relatives are: Asuka, who works at the office and Sayaka, a student. One day, Yuya takes care of Asuka who came home drunk and who tells him that she likes his kindness and pushes him down. Sayaka, witnesses them and when Yuya and her spend the day together, Sayaka's plan to seduce Yuya, begins.
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