Characters played by Shin Ha-kyun
Lee Shi-joon
Characters played by Joo Min-Kyung
Gong Ji-sun
Characters played by Jung So-Min
Han Woo-joo
Characters played by In-ho Tae
In Dong-hyuk
Characters played by Park Yejin
Ji Young-won
Characters played by Kim Kyeong-min
Doctor
Characters played by Jang Young-hyeon
Patient with tic disorder
Characters played by Kim Hyeon-Ok
Kim Young Sun
Characters played by Woo Jin Kim
Ensemble member