A secret relationship between two people that a daughter should never know! Youngo goes to a cute girlfriend 's health home and enjoys her affairs with her, and comes face to face with her mother Seo - young, who has accidentally entered the room. Youngo feels exhilarating pleasure before embarrassment and feels seo young as woman from that moment. While health is unknown, the relationship between Youngo and Seo Young is getting deeper and deeper.