"I want to see my wife having sex with another person ..." A series of "first couple exchanges" closely related to the swapping experience of a mature couple. A omnibus containing all 3 works and 4 titles released by June 2009. [1] "No! You ... I'm crazy !!" In the first couple exchange, the two couples are covered with sweat and body fluids and go crazy. [2] "Please! Don't look so much! Iku!" Two couples go crazy with jealousy and excitement. [3] "Do you feel comfortable? I don't want to answer that ... Ah" The couple has sex with other men and women in front of their loved ones.
