Cast

• Ma Dong-seok — Nam-san
• Lee Hee-joon — Yang Gi-su
• Lee Jun-young — Ji-wan
• Roh Jeong-eui — Soo-na
• Kim Young-sun — Lee Ju-Ye's mother
• Jang Young-nam — Teacher
• Ahn Ji-hye — Lee Eun-ho
• Sung Byung-sook — Yeon-Su
• Jung Young-joo — Jewelry Woman
• Park Hyo-joon — Tiger
• Choi Dong-goo — Eunpaljji
• Lee Sung-woo — Pung-Gi
• Kim Young-ah — Senior Researcher
• Earl Baylon — Nam-san (voice)
• Hao Feng — Eunpaljji (voice)
• Andrew Grace — Sergeant Kwon Ji-hoon (voice)
• June Angela — Yeon-su (voice)
• Kim Byung-chul — Kim Hak-yong's Father
• Hwang Youn-Hee — Water Filtration Worker
• Liz Burnette — Teacher (voice)
• Park Ji-hoon — Sergeant Kwon Ji-hoon
• Baek Seung-chul — Water Filtration Worker
• Won Choon-gyu — Apartment Resident
• Jung Gi-sub — Lee Joo-ye's Father
• Park Sang-hoon — Assistant Manager Choi
• Ahn Seong-bong — Assistant Manager Oh
• Lee Han-joo — Lee Joo-ye
• Kim Tae-hoon — Apartment Sentry
• Kil Eun-sung — Apartment Soldier
• Yoo Dam-yeon — Kim Hak-yong's Mother
• Song Chae-bin — So-yeon
• Hong Yi-joo — Parent
• Shin Sung-Il — Parent
• Sin Sin-beom — Grandfather