유호정
Na-mi
심은경
Young Na-mi
진희경
Choon-hwa
강소라
Young Choon-hwa
고수희
Jang-mi
김민영
Young Jang-mi
홍진희
Jin-hee
박진주
Young Jin-hee
이연경
Geum-ok
남보라
Young Geum-ok
김선경
Bok-hee
김보미
Young Bok-hee
민효린
Young Su-ji
김시후
Young Joon-ho / Joon-ho's Son
박영서
Young Jong-ki
Chun Woo-hee
Sang-mi
김혜옥
Na-mi's Mother
정석용
Jong-ki
하승리
Ye-bin
김영옥
Na-mi's Grandmother
Baek Jong-hak
Nami's Husband
정원중
Na-mi's Father
김원해
Teacher
김새벽
Class Monitor
Kang Rae-yeon
Jong-ki's Girlfriend
김예원
Girls' Generation Leader
류혜린
Girls' Generation Member
이경영
Joon-ho
Bae Soo-kyung
Gang High School Girl
박순천
Woman in Past Picture
소희정
Homeroom Teacher
차태현
Insurance Company Main Model
이준혁
President of Private Detective Office
Han Seung-hyeon
Jung-mi's Older Brother
양희경
Jang-mi's Mother
주진모
Sung-chan
고준
Private Detective
Kwon Eun-soo
School Broadcasting Club DJ
Choi Yi-sun
Joon-ho's Friend
성지루
Choon-hwa's Lawyer
Eom Hye-soo
Sang-mi's Group
Ahn Soo-ho
Judge
Yang Joo-ho
Insurance Company Branch Manager
이상아
Woman in Past Picture
Hwang Choon-ha
Past Detective
Park Hee-jeong
Young-jin
Yoon Jung
Su-ji
Jun Yoon-ji
Student Presenter at Festival
Choi Soo-im
Bully Female Student
Lee Seung-heon
Joon-ho's Friend
