Kim Ha-neul
Yoon So-eun
Yoo Ji-tae
Ji-in
Ha Ji-won
Soe Hyeon-ji
Park Yong-woo
Ji Dong-hee
Shin Cheol-jin
Security Guard
Yoo Tae-gyun
Yoon So-eun's Father
Lee In-ok
Yoon So-eun's Mother
Lee Yeong-gwang
Professor
Kim Sang-won
Ji-in's Friend
Kim Do-yoon
Ham Radio Club 1
Lee Kyung-Hoon
Literature Club 3
Kim Min-ju
Hur Sun-mi
Maeng Bong-hak
Doctor
Kim Bang-Sun
Librarian