The Liar and His Lover

Lee Hyun-woo

Kang Han-Kyeol

JOY

Yoon So-Rim

Choi Min-soo

Kang In-Woo

Lee Jung-jin

Choi Jin-Hyuk

Kim In-kwon

Homeroom Teacher

Im Ye-jin

Kim Soon-Hee

Lee Seo-won

Seo Chan-Young

Sung Joo

Yoo Shi-Hyun

홍금비

Chae Yoo-Na

Song Kang

Baek Jin-Woo

Jang Ki-yong

Ji In-ho

Lee Su-ryeon

Reporter

Jung Yoo Geun

Kang Han-Kyeol (child)

Lee Yoo-jun

[sound engineer]

Lee Seo Hyeon

Yoon So-Rim (child)

Kang Woo-je

[Yoo Hyun Jung's assistant]

Kim Yong-geon

[Yoo Hyun Jung's father, chairman Who Entertainment]

박종혁

Lee Kyoo Sun

신제민

Lee Yoon

Yoo Joo-won

Lee Kyoo Sun (young)

Kim Min-seok

Koo Joon Seok

Lee Hye-bin

Trainee

Yeon Woo

Trainee

Kim Na-yun

Trainee

Park Hae-soo

Bass player

Yang Kyung-won

[director of the competition]

Lee Jun Yong

[ member boy group from show "Produce 20"]

Lee Sang Ho

[ member boy group from show "Produce 20"]

Go Bon Kuk

[ member boy group from show "Produce 20"]

Han Jae Un

[ member boy group from show "Produce 20"]

Kim Ji-woong

[ member boy group from show "Produce 20"]