Ditto

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

김도윤

Ham Radio Club 1

Lee Kyung-Hoon

Literature Club 3

Kim Min-joo

Hur Sun-mi

맹봉학

Doctor

Kim Bang-Sun

Librarian

김도식

Butler