Character Name : Yoon So-eun

Original Name : 김하늘

Gender : Female

Character Name : Ji-in

Original Name : 유지태

Gender : Male

Character Name : Soe Hyeon-ji

Original Name : 하지원

Gender : Female

Character Name : Ji Dong-hee

Original Name : 박용우

Gender : Male

Character Name : Security Guard

Original Name : Shin Cheol-jin

Gender : Male

Character Name : Yoon So-eun's Father

Original Name : Yoo Tae-gyun

Gender : Male

Character Name : Yoon So-eun's Mother

Original Name : 이인옥

Gender : Female

Character Name : Professor

Original Name : Lee Yeong-gwang

Gender : Male

Character Name : Ji-in's Friend

Original Name : Kim Sang-won

Gender : Male

Character Name : Ham Radio Club 1

Original Name : Kim Do-yoon

Gender : Male

Character Name : Literature Club 3

Original Name : Lee Kyung-Hoon

Gender : Male

Character Name : Hur Sun-mi

Original Name : Kim Min-joo

Gender : Female

Character Name : Doctor

Original Name : 맹봉학

Gender : Male

Character Name : Librarian

Original Name : Kim Bang-Sun

Gender : Female