The Truth About Se Yeon

문가영

Lim Ju-kyung

차은우

Lee Su-ho

황인엽

Han Seo-jun

박유나

Kang Soo-jin

임세미

Lim Hee-kyung

박호산

Lim Jae-pil

장혜진

Hong Hyun-suk

오의식

Han Joon-woo

Kim Min-ki

Lim Ju Young

Kim Min-ki

Lim Ju-young

강민아

Choi Soo-a

Lee Woo-je

Kim Cho-rong

Yoon Seo-ah

Young Im Hee-kyung

전혜원

Park Sae-mi

Yeo Joo-ha

Han Go-woon

Lee Il-jun

Yoo Tae-hoon

Lee Joo-Ahn

Choi Man-shik

이상진

Ahn Hyun-gyu

Kim Hyun-Ji

Kim Si-hyun

Han Yi Young

Ha Ji-young

정준호

Lee Joo-hun

김정학

Mr. Oh

서혜원

Se-mi's Friend

Kim Ryul-Ha

Kim Ga-young

Oh Yu-jin

Joo Hye-min

임현성

Comic Store Owner

Ahn So-Rim

Lee Ye-rim

Ahn Sang-woo

Disciplinary Teacher

Kim Byung-choon

Vice-principal

고우리

Selena Lee

Park Sung-Jin

Yoo Gang-hyeon

Kim So-bin

Classmate

Oh Chae-eun

Woo-hyeon's Girlfriend

강찬희

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

Park Hyun Jung

Lee Mi Hyang [Seo Jun’s mother]

박영수

[Columbus Park]

Seong Jeong-seon

[Community center grandmother]

Jung Sae-Rom

[Soo Jin's math tutor]

Kim Bong-hee

[Community center grandmother]