Currently available on 2 streaming services.

Streaming, rent, or buy At Eighteen – Season 1:

Currently you are able to watch "At Eighteen - Season 1" streaming on Netflix, Kocowa.

Cast

Ong Seong-wu
Choi Joon-Woo
Kim Hyang-gi
Yoo Soo-Bin
Shin Seung-ho
Ma Whi-Young
Kang Ki-young
Oh Han-Kyeol
Sim Yi-young
Joon-Woo's mother
Kim Sun-young
Soo-Bin's mother
Choi Jae-woong
Choi Myeong-jun
Moon Bin
Jung Oh-je
Jung Young-ju
Park Geum-ja
Jung Hyeon-jun
Choi Joon-Woo (young)
Yoo In-soo
Yoo Pil-Sang
Han Sung-min
Hwang Ro Mi [Soo Bin's classmate]
Kim Bo-yoon
Kwon Da-hwin
Moon Joo-yeon
Yoon So-ye