Pemeran Moment at Eighteen

Ong Seong Wu (옹성우)

as Choi Jun Woo

Pemeran Utama

Kim Hyang Gi (김향기)

as Yu Soo Bin

Pemeran Utama

Shin Seung Ho (신승호)

as Ma Hwi Young

Pemeran Utama

Kang Ki Young (강기영)

as Oh Han Gyul

Pemeran Utama

Lee Seung Min

as Lee Ki Tae [Jun Woo's classmate]

Pemeran Pembantu

Kim Do Wan (김도완)

as Cho Sang Hoon [Jun Woo's classmate]

Pemeran Pembantu

Moon Bin

as Jung Oh Je [Jun Woo's friend]

Pemeran Pembantu

Jung Young Joo

as Park Geum Ja [Hwi Young's mother]

Pemeran Pembantu

Han Sung Min

as Hwang Ro Mi [Soo Bin's classmate]

Pemeran Pembantu

Sung Ki Yoon

as Ma Yoon Gi [Hwi Young's father]

Pemeran Pembantu

Kim Sun Young

as Yoon Song Hee [Soo Bin's mother]

Pemeran Pembantu

Sim Yi Young

as Lee Yun Woo [Jun Woo's mother]

Pemeran Pembantu

Park Sung Geun

as Lee Guan Yong [Vice Principal]

Pemeran Pembantu

Heo Young Ji

as Kim Ji Min [Part-timer]

Pemeran Pembantu

Moon Joo Yeon

as Yoon So Ye [Soo Bin's classmate]

Pemeran Pembantu

Kim Ga Hee

as Moon Chan Yeol [Soo Bin's classmate]

Pemeran Pembantu

Yoo In Soo (유인수)

as Yoo Pil Sang [Jun Woo's classmate]

Pemeran Pembantu

Shin Ki Joon

as Ha Shim Bok

Pemeran Pembantu

Lee Do Hyun

as [Sang Hoon's father] (Ep.8)

Pemeran Pembantu

Kim Bo Yun

as Kwon Da Hin [Soo Bin's classmate]

Pemeran Pembantu

Baek Jae Woo

as Go Dong

Pemeran Pembantu

Lee Hae Young

as Yu Jong Soo [Soo Bin's father] (Ep.9-10, 12)

Pemeran Pembantu

Choi Ga In

as [Tutor]

Pemeran Pembantu

Kim So Hee

as [Broadcasting staff]

Pemeran Pembantu

Woo Joon Seo

as Park Gyu Nam

Pemeran Pembantu

Chae Hee Su

as [Broadcasting staff]

Pemeran Pembantu

Choi Jae Woong

as Choi Myeong Joon [Jun Woo's father] (Ep.2, 13-14)

Bintang Tamu

Lee Shi Woo

as Ma Whi Young [Young] (Ep. 9)

Bintang Tamu

Choi Dae Hoon (최대훈)

as Son Je Yeong [Mathematics Teacher] (Ep.1, 4, 6-8)

Bintang Tamu

Song Geon Hee

as Sin Jeong Hu [Jeon U's best friend] (Ep. 3-4)

Bintang Tamu

Lee Seung Il

as Joo Hyun Jang

Bintang Tamu

Ri Min

as [Part-timer at a Convenience Store] (Ep. 1, 3, 6-7)

Bintang Tamu

Choi Woo Sung (최우성)

as Lim Gun Hyuk [Byungmun High School] (Ep.3-5)

Bintang Tamu

Kim Kwang Shik

as [Oh Je's father] (Ep.5-8)

Bintang Tamu

Jung Hyun Joon

as Choi Joon Woo [Child] (Ep.2-3, 5, 14)

Bintang Tamu

Kim Ji Woo

as Shin Jeong Hu [Child] (Ep.3, 5)

Bintang Tamu

Lee Hwa Jung

as [Soo Bin's Bodyguard] (Ep.13-14)

Bintang Tamu

Kang Hoon (강훈)

as [Ma Hwi Young's older brother] (Ep.16)

Bintang Tamu

Son Kyung Won

as [Ro Mi's father]

Bintang Tamu

Min Jung Sup

Bintang Tamu

Choi Yeon Ho

Bintang Tamu

Jeon Hyun Sook

Bintang Tamu

Jeon Jin Seo

Bintang Tamu

Seo Jeong Uk

as [Student]

Bintang Tamu

Jung Se Hyun

as [Female student]

Bintang Tamu

Kim Nu Rim

as [High School student]

Bintang Tamu

Shim Na Yeon

Sutradara

Oh Hwan Min

Executive Producer

Yoon Kyung Ah

Screenwriter