Pemeran Weak Hero Class 1

Park Ji Hoon (박지훈)

as Yeon Si Eun / Gray Yeon

Pemeran Utama

Choi Hyun Wook (최현욱)

as An Su Ho / Stephen An

Pemeran Utama

Hong Kyung (홍경)

as O Beom Seok / Bryce O

Pemeran Utama

Kim Su Gyeom (김수겸)

as Jeon Yeong Bin / Oswald Yang

Pemeran Utama

Lee Yeon

as Yeong I

Pemeran Pembantu

Shin Seung Ho (신승호)

as Jeon Seok Dae

Pemeran Pembantu

Hwang Sung Bin

as Han Tae Hun

Pemeran Pembantu

Cha Woo Min

as Kang U Yeong [UFC player]

Pemeran Pembantu

Yoon Jung Hoon

as Lee Jeong Chan

Pemeran Pembantu

Na Chul

as Kim Gil Su

Pemeran Pembantu

Park Jung Hoon

as Hung Gyu

Pemeran Pembantu

Yeom Ji Young

as [Grade 1 Class 6 homeroom teacher]

Pemeran Pembantu

Shin Jun Chul

as [Korean literature teacher]

Pemeran Pembantu

Lee Jae Hak

as [Gang member]

Pemeran Pembantu

Jang Myung Jin

as [PE teacher]

Pemeran Pembantu

Gong Jun Ho

Pemeran Pembantu

Yu Seong Yong

as [Baseball player] (Ep. 1)

Bintang Tamu

Jang Dae Ung

as Kim Won Seok (Ep. 2-3)

Bintang Tamu

Kim Hyuk Jong

as [Police officer 1] (Ep. 3)

Bintang Tamu

Kang Jun Young

as [Police officer 2] (Ep. 3)

Bintang Tamu

Kim Tae Joon

as [Police officer 3] (Ep. 4)

Bintang Tamu

Pyun Hae Joon

as Kim Hui Jun (Ep. 5)

Bintang Tamu

Kim Hoe Chang

as [Bully] (Ep. 5)

Bintang Tamu

Jang Jae Ha

as Yeon Si Eun [Child] (Ep. 7)

Bintang Tamu

Yoo Soo Bin

as Choi Hyo Man [Eunjang High School bully] (Ep. 8)

Bintang Tamu

Kim Hyun

as [School principal] (Ep. 8)

Bintang Tamu

Lee Hae Woon

as [Homeroom teacher] (Ep. 8)

Bintang Tamu

Kim Kyung Min

as Lee Hyeon Min

Bintang Tamu

Chun Myung Woo

as Crong

Bintang Tamu

Kang Min Soo

as [Math teacher]

Bintang Tamu

Jang Tae Hyun

as [Long haired guy]

Bintang Tamu

Park Jae Hwi

as [Gang member]

Bintang Tamu

Jin Hui Gyu

as [Byeoksan high school student]

Bintang Tamu

Seo Dong Gyu

as [Gang member]

Bintang Tamu

Jeon Gang Ho

as [Gang member]

Bintang Tamu

Primary

Composer

Park Dhan Hee

Sutradara

Yoo Su Min

Screenwriter & Sutradara