Thanh Xuân Vật Vã

Kim Sung Oh

Hwang Jang Ho [Dong Man's coach]

Jin Hee Kyung

Hwang Bok Hui [Landlord / mysterious woman]

Lee Elijah

Park Hye Ran [Dong Man's ex-girlfriend]

Kim Gun Woo

Kim Tak Su [MMA fighter]

Yang Jae Young

Choi Won Bo [Tak Su's coach]

Chae Dong Hyun

Yang Tae Hui [Tak Su's manager]

Pyo Ye Jin

Jang Ye Jin [Ju Man's colleague]

Son Byung Ho

Ko Hyeong Sik [Dong Man's father]

Kim Ye Ryung

Park Sun Yang [Dong Man's mother]

Jeon Bae Soo

Choi Jeon Gap [Ae Ra's father]

Kim Hee Chang

Manager Choi [Ju Man's boss]

Kim Sung Bum

Lee Byeong Ju [Jang Ho's student]

Jung Soon Won

Han Du Ho [Jang Ho's student]

Kang Gi Doong

Jang Gyeong Gu [Dong Man's producer friend]

Choi Woo Shik

Park Mu Bin [Dong Man's middle school classmate]

Baek Soo Jang

Kim Chan Ho [Ju Man's work colleague]

Jo Yeon Ho

Ko Dong Man [Young]

Lee Han Seo

Choi Ae Ra [Young]

Kim Ha Yun

Baek Seol Hui [Young]

Lee Dal

Geon Su