Jung Ryeo-won
Kim Jung-yeon
Yang Mi-kyung
Seung-geun's Mother
Lee Sang-hun
Seung-geun's Father
Jang So-yeon
Seung-geun's Girlfriend
Park Young-seo
Delivery Man (uncredited)
Koo Kyo-hwan
Public Service Employee (uncredited)
Lee Kyung-joon
High School Kim (uncredited)
Min Kyung-jin
APT security