Trailer
Cast
So Hee-jung
Homeroom Teacher
Koh Soo-hee
Jang-mi
Park Jin-joo
Young Jin-hee
Kim Bo-mi
Young Bok-hee
Kim Hye-ok
Na-mi's Mother
Kim Sae-byuk
Class Monitor
Lee Jun-hyeok
President of Private Detective Office
Choi E-sun
Joon-ho's Friend
Jun Yoon-ji
Student Presenter at Festival
Jin Hee-kyung
Choon-hwa
Lee Yeon-kyung
Geum-ok
Min Hyo-rin
Young Su-ji
Kim Si-hoo
Young Joon-ho / Joon-ho's Son
Kim Ye-won
Girls' Generation Leader
Ju Jin-mo
Sung-chan
Sung Ji-ru
Choon-hwa's Lawyer
Yoo Ho-jeong
Na-mi
Hong Jin-hee
Jin-hee
Kim Yeong-ok
Na-mi's Grandmother
Bae Soo-kyung
Gang High School Girl
Kwon Eun-soo
School Broadcasting Club DJ
Ryu Hye-rin
Girls' Generation Member
Shim Eun-kyung
Young Na-mi
Kang So-ra
Young Choon-hwa
Ha Seung-lee
Ye-bin
Eom Hye-soo
Sang-mi's Group
Yang Joo-ho
Insurance Company Branch Manager
Nam Bo-ra
Young Geum-ok
Park Young-seo
Young Jong-ki
Chun Woo-hee
Sang-mi
Jung Won-joong
Na-mi's Father
Lee Kyung-young
Joon-ho
Han Seung-hyeon
Jung-mi's Older Brother
Ahn Soo-ho
Judge
Cha Tae-hyun
Insurance Company Main Model
Go Joon
Private Detective
Lee Sang-ah
Woman in Past Picture
Kim Won-hae
Teacher
Yang Hee-kyung
Jang-mi's Mother
Kim Min-young
Young Jang-mi
Kim Sun-kyung
Bok-hee
Jeong Seok-yong
Jong-ki
Baek Jong-hak
Nami's Husband
Kang Rae-yeon
Jong-ki's Girlfriend
Park Soon-cheon
Woman in Past Picture