Cast from Human Form

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)