![poster of At Eighteen](https://image.tmdb.org/t/p/w342/AbEoQOZO6xnXg52Ehrd8aXchpLF.jpg)
Rating:
6.7/10 by 20 users
The Night That Will Never Return
When the class goes on a trip together, the students bring with them a tangled mess of relationship and personal dramas.
Writing:
- Yun Gyeong-a
- Sim Na-yeon
Release Date:
Mon, Jul 22, 2019
Country: KR
Language: Ko
Runtime: 70
Country: KR
Language: Ko
Runtime: 70
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
Season 1:
![The Nameless Kid, Choe Jun-u](https://image.tmdb.org/t/p/w185/mxv3KTOsQVAsH3S1qGZD0QoVHYb.jpg)
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.
![A Moment I Want to Run Away](https://image.tmdb.org/t/p/w185/h7kcJnIe85Hx1zDtCBEqdQBKKKO.jpg)
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.
![It Always Rains on a Sad Day](https://image.tmdb.org/t/p/w185/49l4VIcUGUVInOcmhIGM1Mbxfr7.jpg)
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.
![Happiness and Sadness Come and Go Instantly](https://image.tmdb.org/t/p/w185/g5WyeM5Yeud7HGSsoE2N2T8ER56.jpg)
Su-bin and Jun-u continue practicing their English for the upcoming evaluation. Sin Jeong-hu writes a letter, and makes a heartfelt apology.
![After that Long and Sad Day](https://image.tmdb.org/t/p/w185/fwCrvPD6QyAQQ0sUZDlHL6kPht8.jpg)
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.
![The Timing of Action and Reaction](https://image.tmdb.org/t/p/w185/hhLiXMmbwO4uyyrtdmSRouswPCD.jpg)
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.
![Romeo and Juliet](https://image.tmdb.org/t/p/w185/4dU8xNF9yLxzfMNuoYtxNQpGgSZ.jpg)
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.
![The Moment of Your First Love](https://image.tmdb.org/t/p/w185/xyctVu8p3etLc4OYfPMcO87Zr7S.jpg)
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.
![I'm Sorry](https://image.tmdb.org/t/p/w185/eQxoNGYTomyh3GMR9qcTF5Aqqf0.jpg)
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.
![The Night That Will Never Return](https://image.tmdb.org/t/p/w185/36LYkCaN8kroPvcpkqKpqR5F3km.jpg)
When the class goes on a trip together, the students bring with them a tangled mess of relationship and personal dramas.
![The Emotions That I Got to Know Through You](https://image.tmdb.org/t/p/w185/l4D1oooKdw8hNzWWIATsx2D50pJ.jpg)
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.
![Being More Mature Than Adults at the Age of 18](https://image.tmdb.org/t/p/w185/1N7O3bFIdj1EptF80IgpJfnQKKK.jpg)
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.
![I Should Still Like You](https://image.tmdb.org/t/p/w185/wE0IVIzDOR55jlgXRhe8sO13W55.jpg)
Finals approach, Song-hui's disapproval forces Su-bin and Jun-u apart, and Han-kyeol tracks down Hwi-yeong's old teacher.
![Happy Birthday to You](https://image.tmdb.org/t/p/w185/mr9UbdXHnLulHQPHqOEFIrvzo43.jpg)
Everyone worries when the rumor about Hwi-yeong gets him into real trouble. Jun-u tells Han-kyeol about his newfound goal.
![Ways to Embrace Your Scar](https://image.tmdb.org/t/p/w185/dMSndXrZ3rDWrqeJJ9biKBYavn7.jpg)
Song-hui remains stubborn about Su-bin and Jun-u, who enters an art academy. The school board investigates Hwi-yeong's case.
![This Goodbye Isn't Forever](https://image.tmdb.org/t/p/w185/oChzDGDkRZqr7rrcVgcli1aeiez.jpg)
Hwi-yeong makes peace with the others -- and himself. Jun-u realizes his mother's situation, and must break difficult news to Su-bin.