Episode 1
The Nameless Kid, Choe Jun-u
1h 8m8.0 / 10
Not long after arriving at a new high school, where he's shown around by star student Ma Hwi-yeong, Choe Jun-u faces an unfair accusation.
Where to watch At Eighteen
TV series
At Eighteen
20191 season6.8 / 10
A misunderstood loner is drawn out of his shell after transferring to another high school, where he comes across new ordeals -- and first love.
Streaming, rental and purchase options
Where to watch in United States
Checked Jul 22, 2026
At Eighteen is available to stream on Netflix, Rakuten Viki, and The Roku Channel in United States. Use the direct links below to open the provider.
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Synopsis
A misunderstood loner is drawn out of his shell after transferring to another high school, where he comes across new ordeals -- and first love.
Season 1 episodes
Choose an episode, then use the watch options above for the show.
Episode 2
A Moment I Want to Run Away
1h 4m8.0 / 10
Jun-u prepares to transfer schools again. Yu Su-bin doesn't believe Jun-u took the watch. Hwi-yeong won't own up to what he did.
Where to watch At Eighteen
Episode 3
It Always Rains on a Sad Day
1h 7m7.0 / 10
Jun-u beats out Hwi-yeong to pair up with Su-bin for a class assignment, and receives an urgent call about an old friend.
Where to watch At Eighteen
Episode 4
Happiness and Sadness Come and Go Instantly
1h 6m8.0 / 10
Su-bin and Jun-u continue practicing their English for the upcoming evaluation. Sin Jeong-hu writes a letter, and makes a heartfelt apology.
Where to watch At Eighteen
Episode 5
After that Long and Sad Day
1h 7m7.0 / 10
Jun-u's outburst of rage panics Hwi-yeong, who has something to cover up. O Han-kyeol visits someone who can testify to the truth.
Episode credits
Guest stars Kim Kwang-shik
Episode 6
The Timing of Action and Reaction
1h 4m8.0 / 10
Fighting with her mother, Su-bin doesn't go home. Determined to reveal Hwi-yeong's true nature, Jun-u starts to gain insight into his behavior.
Episode credits
Guest stars Kim Kwang-shik
Episode 7
Romeo and Juliet
1h 1m9.0 / 10
Su-bin and Jun-u can't stop thinking about each other -- but don't know what to do about it. Hwi-yeong agonizes over one wrong answer on a math test.
Episode credits
Guest stars Kim Kwang-shik
Episode 8
The Moment of Your First Love
1h 2m9.0 / 10
Even as Su-bin learns she's not the only one who likes Jun-u, she's excited for their first date. Jo Sang-hun goes up against Hwi-yeong's parents.
Episode credits
Guest stars Kim Kwang-shik, Lee Do-hyun
Episode 9
I'm Sorry
1h 7m7.0 / 10
Hwi-yeong sends Su-bin something that cuts her date with Jun-u short. Han-kyeol turns away a bribe. Yun Song-hui searches for a driver.
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Episode 10
The Night That Will Never Return
58m7.0 / 10
When the class goes on a trip together, the students bring with them a tangled mess of relationship and personal dramas.
Where to watch At Eighteen
Episode 11
The Emotions That I Got to Know Through You
1h 2m7.0 / 10
Han-kyeol deals with a petition to replace him. Hwi-yeong removes Su-bin from the tutor group, which bothers Song-hui more than it does her.
Where to watch At Eighteen
Episode 12
Being More Mature Than Adults at the Age of 18
1h 4m8.0 / 10
A rumor about Hwi-yeong's grades being rigged spreads like wildfire. Su-bin hesitates to tell Song-hui something, and meets with her father.
Where to watch At Eighteen
Episode 13
I Should Still Like You
1h 8m6.0 / 10
Finals approach, Song-hui's disapproval forces Su-bin and Jun-u apart, and Han-kyeol tracks down Hwi-yeong's old teacher.
Where to watch At Eighteen
Episode 14
Happy Birthday to You
1h 3m8.0 / 10
Everyone worries when the rumor about Hwi-yeong gets him into real trouble. Jun-u tells Han-kyeol about his newfound goal.
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Episode 15
Ways to Embrace Your Scar
1h 6m9.0 / 10
Song-hui remains stubborn about Su-bin and Jun-u, who enters an art academy. The school board investigates Hwi-yeong's case.
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Episode 16
This Goodbye Isn't Forever
1h 6m8.0 / 10finale
Hwi-yeong makes peace with the others -- and himself. Jun-u realizes his mother's situation, and must break difficult news to Su-bin.
Where to watch At EighteenEpisode information updated Jul 23, 2026
More about At Eighteen
Cast
Ong Seong-wuChoi Joon-Woo
Kim Hyang-giYoo Soo-Bin
Shin Seung-hoMa Whi-Young
Kang Ki-youngOh Han-Kyeol
Shim Yi-youngJoon-Woo's mother
Kim Sun-youngSoo-Bin's mother
Choi Jae-woongChoi Myeong-jun
Moon BinJung Oh-jeCredits
- Created by
- Sim Na-yeon, Yun Gyeong-a
- Written by
- Yun Gyeong-a
Production details
- Status
- Ended
- Series type
- Scripted
- Episodes
- 16
- Original language
- Korean
- Original title
- 열여덟의 순간
Networks & production
JTBCSouth Korea
KEYEASTSouth Korea
JTBC StudiosSouth Korea
Themes
coming of agefirst loveheartfelthigh schoolhigh school rivalrylove triangleromanceromantic
