On screen
Cast
92 credited performers
Mun Ka-young
Lim Ju-kyung
Cha Eun-woo
Lee Su-ho
Hwang In-youp
Han Seo-jun
Park You-na
Kang Soo-jin
Im Se-mi
Lim Hee-kyung
Park Ho-san
Lim Jae-pil
Jang Hye-jin
Hong Hyun-suk
Oh Eui-sik
Han Joon-woo
Kim Min-ki
Lim Ju-young
Kang Min-ah
Choi Soo-a
Lee Woo-je
Kim Cho-rong
Yoon Seo-ah
Young Im Hee-kyung
Jeon Hye-won
Park Sae-mi
Yeo Joo-ha
Han Go-woon
Lee Il-jun
Yoo Tae-hoon
Lee Joo-ahn
Choi Man-shik
Lee Sang-jin
Ahn Hyun-gyu
Kim Hyun-Ji
Kim Si-hyun
Han Yi Young
Ha Ji-young
Jung Jun-ho
Lee Joo-hun
Kim Jung-hak
Mr. Oh
Seo Hye-won
Se-mi's Friend
Kim Ryul-Ha
Kim Ga-young
Oh Yu-jin
Joo Hye-min
Lim Hyun-sung
Comic Store Owner
Ahn So-rim
Lee Ye-rim
Ahn Sang-woo
Disciplinary Teacher
Kim Beong-choun
Vice-principal
Koh Woo-ri
Selena Lee
Park Sung-jin
Yoo Gang-hyeon
Kim So-bin
Classmate
Oh Chae-eun
Woo-hyeon's Girlfriend
Park Hyun Jung
Lee Mi-hyang (Seo-jun's Mother)
Kang Chan-hee
Jeong Se-yeon
Shin Jae-whi
Lee Sung Yong [Yongpa High student]
Hwang Jung-ha
Byeon Joon-hyeok
Lee Go-eun
Lim Joo Gyung [Young]
Lee Seung-Woo
Lee Su Ho [Young]
Seo Sang-won
Doctor Kang [Soo Jin's father]
Yoo Dam-Yeon
[Soo Jin's mother]
Kang Cho-won
[Saebom High student bully]
Lee Sun-Young
[Math teacher]
Cha Yeong-ok
[Neighborhood woman]
Song Hoon
[History teacher]
Kim Jae-hwa
[Music teacher]
Joo Se-Bin
Jin Hee Jung [Seobom High freshman student
Lee Eun-joo
[Move Entertainment team leader]
Park Young-soo
[Columbus Park]
Jung Dae-ro
[Hee Kyung's acquaintance]
Yoon Jeong-seop
[Joo Hun's assistant]
Dayoung
Chen [Move Entertainment celebrity]
Lee Byung-Jae
[Seo Jun's band member]
Ko Han-min
[Photographer]
Park Seo-kyung
Lim Hee Gyung [Young]
Park Ju-Hwan
Lim Joo Young [Young]
Ok Joo-ri
[Neighborhood woman]
Choi E-sun
[Yongpa High student]
Han Myeong-hwan
[Yongpa High student]
Lee Tae-ri
Wang Hyun-bin
Shin Seo-woo
Character not listed
Lee Jae-eun
[Su Ho's housekeeper]
Um Tae-Yoon
[Comic store customer]
Jang Young-hyeon
[Convenience store friend #1]
Moon Hak-jin
[Convenience store friend #2]
Ham Tae-Gyun
[Convenience store friend #3]
Kim Hye-yoon
Eun Dan Oh [Movie goer]
Lee Jae-wook
Baek Kyung [Movie goer]
Jung Gun-joo
Ryu Hyung Jin [Baseball player]
Geum Gwang-san
[Sung Yong's father]
Park Ji-ho
[Baseball game spectator]
Lee Si-young
[Swarovski saleswoman]
Woo Hyeon
[Camp ground owner]
Yoo Ok-joo
[Angry customer]
Seong Jeong-seon
[Community center grandmother]
Jeong Sae-rom
[Soo Jin's math tutor]
Yoon To-Wang
[Gangster]
Lee Jung-yeol
[Bus driver]
Hong Dae-sung
[Move Entertainment employee]
Lee Han-wi
Min Jae Joon [Plastic surgeon]
Kim Ji-su
[Wedding shop staff]
Kim Young-dae
Oh Nam Joo [Man at Namsan Tower]
Kwon Ban-seok
Dr. Han Chae Hoon [Emergency room doctor]
Paul Battle
[Doctor]
Kim Bong-hee
[Community center grandmother]
Jang Ye-Rim
[Female student]
Jo Yoon-soo
[Student]
Choi Da-young
[Reporter]
Cho Seok-in
[Cinema viewer]
Kim Won-shik
Ji Woo Hyeon
Terris Brown
[English teacher]
Kim Si-woo
[Kindergarten boy]
Kang Du-hyun
[Playground bully]