DRCM

A couple has nowhere to go after the husband's business fails. The wife, Mai, decides to contact Aya, an upper class student from her college days. Although Aya is married, she loves Mai more than her husband. Unable to refuse Mai's long-awaited request, Aya persuades her husband to let them live together for the time being. One day, Mai says that sex with her husband has recently lost its freshness, and to solve her problem, Aya suggests swapping.

Chie is worried about her daughter's lack of interest in studying, so she asks Ryuji, who has entered a prestigious university, to help her. Her daughter is only interested in her relationship with Ryuji, not studying. Chie, who hasn't had sex with her husband recently, accidentally finds out about her daughter's relationship with Ryuji. Chie then asks Ryuji to have sex with her to help her daughter's studies.

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.