Lim Ju-kyung

Lee Su-ho

Han Seo-jun

Kang Soo-jin

Lim Hee-kyung

Lim Jae-pil

Hong Hyun-suk

Han Joon-woo

Lim Ju-young

Choi Soo-a

Kim Cho-rong

Young Im Hee-kyung

Park Sae-mi

Han Go-woon

Yoo Tae-hoon

Choi Man-shik

Ahn Hyun-gyu

Kim Si-hyun

Ha Ji-young

Lee Joo-hun

Mr. Oh

Se-mi's Friend

Kim Ga-young

Joo Hye-min

Comic Store Owner

Lee Ye-rim

Disciplinary Teacher

Vice-principal

Selena Lee

Yoo Gang-hyeon

Classmate

Woo-hyeon's Girlfriend

Jeong Se Yeon [Su Ho & Seo Jun's friend]

Lee Sung Yong [Yongpa High student]

Lee Mi Hyang [Seo Jun’s mother]

Byeon Joon Hyeok [Yongpa High student]

Lim Joo Gyung [Young]

Lee Su Ho [Young]

Doctor Kang [Soo Jin's father]

[Soo Jin's mother]

[Saebom High student bully]

[Math teacher]

[Neighborhood woman]

[History teacher]

Jin Hee Jung [Seobom High freshman student bully]

[Music teacher]

[Move Entertainment team leader]

[Columbus Park]

[Hee Kyung's acquaintance]

[Joo Hun's assistant]

Chen [Move Entertainment celebrity]

[Seo Jun's band member]

[Photographer]

Lim Hee Gyung [Young]

Lim Joo Young [Young]

[Neighborhood woman]

[Yongpa High student]

[Yongpa High student]

Wang Hyun Bin [Joo Gyung's crush]

[Su Ho's housekeeper]

[Comic store customer]

[Convenience store friend #1]

[Convenience store friend #2]

[Convenience store friend #3]

Eun Dan Oh [Movie goer]

Baek Kyung [Movie goer]

Ryu Hyung Jin [Baseball player]

[Sung Yong's father]

[Baseball game spectator]

[Swarovski saleswoman]

[Camp ground owner]

[Angry customer]

[Community center grandmother]

[Soo Jin's math tutor]

[Gangster]

[Bus driver]

[Move Entertainment employee]

Min Jae Joon [Plastic surgeon]

[Wedding shop staff]

Oh Nam Joo [Man at Namsan Tower]

Dr. Han Chae Hoon [Emergency room doctor]

[Doctor]

[Community center grandmother]

[Female student]

[Student]

[Reporter]

[Cinema viewer]

Ji Woo Hyeon

[English teacher]

[Kindergarten boy]

[Playground bully]