Pemeran Begins Youth

Seo Ji Hoon (서지훈)

as Kim Hwan | Kim Chang Jun [Young]

Pemeran Utama

Noh Jong Hyun

as Min Ce In

Pemeran Utama

Ahn Ji Ho

as Jeong Ho Su

Pemeran Utama

Seo Young Joo

as Kim Do Geon

Pemeran Utama

Kim Yoon Woo

as Park Ha Ru

Pemeran Utama

Jung Woo Jin

as Kim Joo An

Pemeran Utama

Jeon Jin Seo

as Jeon Jae Ha

Pemeran Utama

Jung Sung Il

as Kim Chang Jun [Kim Hwan's father]

Pemeran Pembantu

Kim Nam Hee

as Song Jun Ho [Chang Jun's secretary]

Pemeran Pembantu

Nam Myeong Ryeol

as Koo Hyun Bok [Principal]

Pemeran Pembantu

Woo Hee Jin

as Hwang Seo Yoon [Jae Ha's mother]

Pemeran Pembantu

Sung Ji Ru

as [Homeroom teacher]

Pemeran Pembantu

Kim Young Woong

as Kim Seong Hoon [Joo An's father]

Pemeran Pembantu

Lee Hang Na

as Shim Seon Mi [Ha Ru's mother]

Pemeran Pembantu

Yeo Woon

as Choi Ji Han [Psychiatric patient]

Pemeran Pembantu

Im Chul Hyung

as Seo Sung Tae [Jae Ha's step-father]

Pemeran Pembantu

Park Ji Hoon

as Seo Min Kook [Jae Ha's step-brother]

Pemeran Pembantu

Lee Do Yeop

as Min Young Ho [Ce In's father]

Pemeran Pembantu

Moon Jong Ho

as [Student] (Ep. 1)

Bintang Tamu

Kim Gye Seon

as Kim Jung Hee [Ho Su's aunt] (Ep. 1-2, 5, 8, 10)

Bintang Tamu

Cha Soo Rin

as Mrs. Jeong [Do Geon's homeroom teacher] (Ep. 1-3)

Bintang Tamu

Yoon Jung Sub

as [Teacher] (Ep. 1-2)

Bintang Tamu

Jeon Young

as [Housekeeper] (Ep. 1, 3, 10)

Bintang Tamu

Park Young Soo

as [Container owner] (Ep. 1, 5, 8-9)

Bintang Tamu

Chae Yeon Hee

as [Saleswoman] (Ep. 2)

Bintang Tamu

Nam Da Nu

as [Thief student] (Ep. 2)

Bintang Tamu

Kim Ji Hoon

as Jeong Ho Su [Child] (Ep. 2, 8)

Bintang Tamu

Han Yun Jun

as Min Ce In [Young] (Ep. 2, 4, 7-8, 12)

Bintang Tamu

Cha Yu Jin

as Kim Eun Ju [Ce In's mother] (Ep. 2, 4, 6-8, 12)

Bintang Tamu

Nam Jin Bok

as Park Noh Ah (Ep. 3, 5, 8-10)

Bintang Tamu

Jung Hyun Joon

as Park Ha Ru [Young] (Ep. 3, 5, 8-10)

Bintang Tamu

Kim Bi Bi

as [Psychiatrist] (Ep. 3, 10, 12)

Bintang Tamu

Kim Tae Yul

as [Captive kid] (Ep. 3, 5, 8-10)

Bintang Tamu

Jang Joon Ho

as [Doctor] (Ep. 4)

Bintang Tamu

Lee Yoon Jae

as Byeon Won Joong (Ep. 4-5)

Bintang Tamu

Choi Seung Hoon

as Kim Joo An [Young] (Ep. 4, 10, 12)

Bintang Tamu

Shin Bo Ra

as Kim Eun Hye [Joo An's sister] (Ep. 4, 6, 12)

Bintang Tamu

Won Chun Gyu

as [Police officer] (Ep. 5)

Bintang Tamu

Kim In Kwon

as [Police officer] (Ep. 5)

Bintang Tamu

Park Ah Sung

as Kim Do Hyun [Do Geon's brother] (Ep. 5-7)

Bintang Tamu

Kang Tae Joo

as Park Sang Min [Ha Ru's brother] (Ep. 6)

Bintang Tamu

Kwak Na Yeon

as [Ha Ru's neighbor] (Ep. 6)

Bintang Tamu

Lee Shi Hoo

as [Thug] (Ep. 6-7, 10, 12)

Bintang Tamu

Park Yong

as Seo Jang Won [Chang Jun's party attendee] (Ep. 7)

Bintang Tamu

Park Gi Seon

as [Churchgoer] (Ep. 7)

Bintang Tamu

Jang Eui Don

as [Chang Jun's party attendee] (Ep. 7)

Bintang Tamu

Kim Jae Heum

as [Chang Jun's party attendee] (Ep. 7)

Bintang Tamu

Kim Yoon Ho

as Jeong Mi [Student] (Ep. 8)

Bintang Tamu

Jung Hyun Chul

as [Teacher] (Ep. 8-10)

Bintang Tamu

Won Yun Seo

as Kim Eun Hye [Young] (Ep. 9)

Bintang Tamu

Park Jung Eon

as [Doctor] (Ep. 9)

Bintang Tamu

Byun Yoon Jeong

as [Detective] (Ep. 9)

Bintang Tamu

Shin Min Soo

as [Protester] (Ep. 10)

Bintang Tamu

Kim Yong Jin

as [Chang Jun's man] (Ep. 10)

Bintang Tamu

Kim Mi Seung

as [Nurse] (Ep. 10-12)

Bintang Tamu

Jo Seung Yeon

as Lee Young Ran [Joo An's mother] (Ep. 10, 12)

Bintang Tamu

Jeong Soo Hyun

as [Thug] (Ep. 10, 12)

Bintang Tamu

Ki Eun Yoo

as Kim Hwan [Child] (Ep. 11)

Bintang Tamu

Lee Jae Hak

as [Bully kid] (Ep. 12)

Bintang Tamu

Park Ok Chool

as [Do Geon's aunt] (Ep. 12)

Bintang Tamu

Kim Nak Gyun

as [Do Geon's boss] (Ep. 12)

Bintang Tamu

Lee Seung Hyung

as Park Jin Wook [Ha Ru's father]

Bintang Tamu

Oh Mi Hee

as Song Nan Young [Do Geon's mother]

Bintang Tamu

Kim Jae Hong

Sutradara

Kim Soo Jin

Screenwriter

Choi Woo Joo

Screenwriter