Sunmin is a nervous and edgy young man who gets into trouble and has to leave his idol group. After that he closes himself. Nayoon is a cheerful and sociable woman. Joonha, who was living abroad and is Nayoon's friend, needs a new place in Korea, and Nayoon finds a room available at the house owned by Sunmin. However, Joonha cannot come on the move-in date due to his business. Nayoon loses her lease apartment, and decides to move in Sunmin's shared house after she disguises herself as a man.