Secret Boyfriend

문가영

Lim Ju-kyung

차은우

Lee Su-ho

황인엽

Han Seo-jun

박유나

Kang Soo-jin

임세미

Lim Hee-kyung

박호산

Lim Jae-pil

Jang Hye-jin

Hong Hyun-suk

Oh Eui Sik

Han Joon-woo

Kim Min-ki

Lim Ju Young

김민기

Lim Ju-young

강민아

Choi Soo-a

Lee Woo-je

Kim Cho-rong

윤서아

Young Im Hee-kyung

전혜원

Park Sae-mi

Yeo Joo-ha

Han Go-woon

이일준

Yoo Tae-hoon

이주안

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

오유진

Joo Hye-min

임현성

Comic Store Owner

Ahn So-Rim

Lee Ye-rim

안상우

Disciplinary Teacher

김병춘

Vice-principal

고우리

Selena Lee

박성진

Yoo Gang-hyeon

Kim So-bin

Classmate

Oh Chae-eun

Woo-hyeon's Girlfriend

강찬희

Jeong Se-Yeon

송훈

[History teacher]

서상원

Doctor Kang [Soo Jin's father]

Yoo Dam-Yeon

[Soo Jin's mother]

Go Han-min

[Photographer]

Kang Cho-won

[Saebom High student bully]