HentaiMovieRealm.com: Yoyogi Hitozuma Senmon Gakuin 代々木人妻専門学院～乳妻たちのアンニュイ～

"Celebian Housewife Academy" is a private school of the wives, by the wives, for the wives. This school is to learn how to spend a peaceful married life by counseling and hands-on lectures. Kyoko thinks his husband has gone away due to her fault. One day, she receives a phone call from him and she decides to join "CHA" with his younger brother in law, main character, who pretends her husband. Since then, Kyoko and her brother in law have a counseling and hands-on lectures for two weeks until her real husband comes back....