Người Hùng Yếu Đuối

Lee Yeon

Yeong I

Shin Seung Ho

Jeon Seok Dae

Hwang Sung Bin

Han Tae Hun

Cha Woo Min

Kang U Yeong [UFC player]

Yoon Jung Hoon

Lee Jeong Chan

Na Chul

Kim Gil Su

Park Jung Hoon

Hung Gyu

Yeom Ji Young

[Grade 1 Class 6 homeroom teacher]

Shin Jun Chul

[Korean literature teacher]

Gong Hyun Joo

[Yeon Si Eun's mother]

Kim Sung Kyun

[Yeon Si Eun's father]

Jo Han Chul

O Jin Won [O Beom Seok's father]

Oh Dong Min

[O Jin Won's aide]

Jo Yong Geun

[O Jin Won's secretary]

Lee Jae Hak

[Gang member]

Jang Myung Jin

[PE teacher]

Gong Jun Ho

Support Role