The Promise That Couldn't Be Kept

Yoo Yui

Radio Broadcaster (voice)

Ryu Seung-su

Yong Kuk (voice)

Bae Yong-jun

Lee, Min Hyung (voice)

Choi Ji-woo

Jeong, Yu Jin (voice)

Lee Se-na

Oh, Chelin (voice)

Kang Yo-hwan

Kim, Sang-Hyuk (voice)