Pemeran The Nice Guy

Lee Dong Wook (이동욱)

as Park Seok Cheol

Pemeran Utama

Lee Sung Kyung (이성경)

as Kang Mi Yeong

Pemeran Utama

Park Hoon (박훈)

as Kang Tae Hun

Pemeran Utama

Ryu Hye Young

as Park Seok Hui

Pemeran Utama

Oh Na Ra

as Park Seok Gyeong

Pemeran Utama

Cheon Ho Jin

as Park Sil Gon [Seok Cheol's father]

Pemeran Pembantu

Park Myung Shin

as Cho Mak Sun [Seok Cheol's mother]

Pemeran Pembantu

Choi E Jun

as Hyeong Geun [Seok Gyeong's son]

Pemeran Pembantu

Park Mi Hyun

as Yun Hye Suk [Mi Yeong's mother]

Pemeran Pembantu

Kim Do Yoon

as Yun Byeong Su [Detective]

Pemeran Pembantu

Moon Tae Yu

as Jang Gi Hong [Seok Cheol’s high school classmate]

Pemeran Pembantu

Park Sung Yun

as Ko Jeong Nim [Seok Gyeong's friend]

Pemeran Pembantu

Lee Moon Sik

as Kim Chang Su [Gangster Leader]

Pemeran Pembantu

Han Jae Young

as O Sang Yeol [Chang Su's subordinate]

Pemeran Pembantu

Park Doo Shik

as Son Heung Man [Gangster]

Pemeran Pembantu

Cha Shi Won

as Lee Du Sik [Gangster]

Pemeran Pembantu

O Seung Baek

as U Seok [School Bully]

Pemeran Pembantu

Kang Bin

as Im Bok Cheon [Tae Hun's subordinate]

Pemeran Pembantu

Han Min

as Cheon Ho [Tae Hun's driver and bodyguard]

Pemeran Pembantu

Yoo Seung Mok

as "Long Stick" [Sil Gon's junior]

Pemeran Pembantu

Park Won Sang

as Kim Jin Ho

Pemeran Pembantu

Lee Jung Hyun

as Yeon Gi

Pemeran Pembantu

Kim Seon Gyeong

as [Poetry student] (Ep. 1)

Bintang Tamu

Kim Min Che

as [Poetry student] (Ep. 1)

Bintang Tamu

Heo Seon Haeng

as [Poetry student] (Ep. 1)

Bintang Tamu

Jang Joon Hyun

as [Music producer] (Ep. 1)

Bintang Tamu

Jo Young Mi

as [Nursing home caregiver] (Ep. 1)

Bintang Tamu

Jang Joon Ho

as Gi Su [Banker] (Ep. 2)

Bintang Tamu

Jung Eun Ran

as [Janitress] (Ep. 2)

Bintang Tamu

Kim Jae Ho

as [Police officer] (Ep. 2)

Bintang Tamu

Kwak Soo Jung

as [Restaurant owner] (Ep. 2)

Bintang Tamu

Kwak Jin

as [Tae Hun's associate] (Ep. 2)

Bintang Tamu

Lee Yoo Jung

as [Hospital director's wife] (Ep. 2)

Bintang Tamu

Kim Gyeong Min

as [Seok Gyeong's ex-husband] (Ep. 2)

Bintang Tamu

Shin Jun Chul

as [Audition judge] (Ep. 3)

Bintang Tamu

Kwon Jae Hwan

as Mr. Hwang (Ep. 3-4)

Bintang Tamu

Kang Gu Ha

as [Detective] (Ep. 3-4)

Bintang Tamu

Uhm Tae Ok

as [Mr. Hwang’s boss] (Ep. 3-4)

Bintang Tamu

Jwa Chae Won

as [Bully student] (Ep. 4-5)

Bintang Tamu

Park Joo Young

as [Banker] (Ep. 5)

Bintang Tamu

Lee Yeon Joo

as [Nursing program host] (Ep. 5)

Bintang Tamu

Im Sung Kyun

as Jang Hak (Ep. 5-6)

Bintang Tamu

Kwak Ji Yoo

as [Nurse] (Ep. 6)

Bintang Tamu

Park Geon Rak

as [Usher] (Ep. 6)

Bintang Tamu

Lee Do Goon

as [Loan shark] (Ep. 6)

Bintang Tamu

Ha Seung Yeon

as [Music executive] (Ep. 6-7)

Bintang Tamu

Song Hoon

as [CEO] (Ep. 7)

Bintang Tamu

Cha Young Mi

as [Cafe employee] (Ep. 8)

Bintang Tamu

Hwang Dae Ki

as Nup Chi

Bintang Tamu

Park No Kyeong

as Yun Il Jung

Bintang Tamu

Son In Yong

as Captain Jang

Bintang Tamu

Park Young Bin

as Yoo Jae Bong

Bintang Tamu

Park Seo Kyung

as Kang Mi Yeong [Young]

Bintang Tamu

Lee Seung Heon

as Park Seok Cheol [Young]

Bintang Tamu

Baek Hyeon Ju

as [Gambling den boss]

Bintang Tamu

Kim Kang Hee

as [Music class manager] (Ep. 1, 6)

Bintang Tamu

Kwon Ji Han

Bintang Tamu

Kim Dae Geun

as [Changsoo Gang member]

Bintang Tamu

Song Hae Sung

Sutradara

Kim Woon Kyung

Screenwriter