Si Yeon Kim
In-hyung
Lee Ye-eun
Young In-hyung
Jinseon Son
Friend
Sun Hee Kang
Mom
Hong Seung-il
Dad
Ae-Jin Kim
Sister / Consultant (voice)
Sun Wha Koo
Nurse / Sister (voice)
Heo Jeong-do
Suspicious Doctor
Park Jung Min
Dad (voice)