Na-eun (played by Kwon Young-eun) is our final protagonist. The high school student is a bit on the heftier side, but has a genuine talent in song and dance. She also obsesses, as teenage girls often do, on romance. Her hyperactive fantasies get a boost when a mysterious figure named J leaves her candies and a love note. There are two logical candidates- Jin-beom (played by Cho Sung-jun) is bright and cheerful, always doing high fives. Kang-joon (played by Kim Min-ki-I) is an extremely cute member of a flash-in-the-pan since disbanded boy band, Adult Trainee, Bang So-min, Cho Sung-jun, Jeong Hyeong-geon, Jin Yoon-joo, Jo Yoo-jung, Kim Hyun-min, Kim Min-ki-I, Kwon Young-eun, Miyeon, Park Se-hyun, Ryeoun, Ryu Ui-hyun, Yoo Hak-chan