■This video is a public training documentary of a couple who contacted the editorial department of an SM magazine, asking for their cuckolding desires to be fulfilled. ■The email that arrived at the editorial department began with the following sentence: "Kana, a faithful wife who has been married for over 20 years and has only ever had my husband's penis in her hole, does not seem to have any particularly perverted sexual preferences." And as their sex life became monotonous...