김하늘

Yoon So-eun

유지태

Ji-in

하지원

Soe Hyeon-ji

박용우

Ji Dong-hee

신철진

Security Guard

Yoo Tae-gyun

Yoon So-eun's Father

이인옥

Yoon So-eun's Mother

Lee Yeong-gwang

Professor

Kim Sang-won

Ji-in's Friend