Yoona is a girl who likes to dress as a guy and pretend to be a guy. That's her secret. Jaebum is someone who thinks he turned gay because of Seungchoel who is actually a girl, Yoona. But Jaebum found out that Seungchoel(Yoona) is actually a girl and not a guy. Will Jaebum be angry at her or will he confess to her?