At Eighteen

• 
  E1

  The Nameless Kid, Choe Jun-u

  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.

  2019-07-22 · 68m
• 
  E2

  A Moment I Want to Run Away

  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.

  2019-07-23 · 64m
• 
  E3

  It Always Rains on a Sad Day

  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.

  2019-07-29 · 67m
• 
  E4

  Happiness and Sadness Come and Go Instantly

  Su-bin and Jun-u continue practicing their English for the upcoming evaluation. Sin Jeong-hu writes a letter, and makes a heartfelt apology.

  2019-07-30 · 66m
• 
  E5

  After that Long and Sad Day

  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.

  2019-08-05 · 67m
• 
  E6

  The Timing of Action and Reaction

  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.

  2019-08-06 · 64m
• 
  E7

  Romeo and Juliet

  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.

  2019-08-12 · 61m
• 
  E8

  The Moment of Your First Love

  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.

  2019-08-13 · 62m
• 
  E9

  I'm Sorry

  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.

  2019-08-19 · 67m
• 
  E10

  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.

  2019-08-20 · 58m
• 
  E11

  The Emotions That I Got to Know Through You

  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.

  2019-08-26 · 62m
• 
  E12

  Being More Mature Than Adults at the Age of 18

  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.

  2019-08-27 · 64m
• 
  E13

  I Should Still Like You

  Finals approach, Song-hui's disapproval forces Su-bin and Jun-u apart, and Han-kyeol tracks down Hwi-yeong's old teacher.

  2019-09-02 · 68m
• 
  E14

  Happy Birthday to You

  Everyone worries when the rumor about Hwi-yeong gets him into real trouble. Jun-u tells Han-kyeol about his newfound goal.

  2019-09-03 · 63m
• 
  E15

  Ways to Embrace Your Scar

  Song-hui remains stubborn about Su-bin and Jun-u, who enters an art academy. The school board investigates Hwi-yeong's case.

  2019-09-09 · 66m
• 
  E16

  This Goodbye Isn't Forever

  Hwi-yeong makes peace with the others -- and himself. Jun-u realizes his mother's situation, and must break difficult news to Su-bin.

  2019-09-10 · 66m

Top 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

Shim Yi Young

Joon-Woo's mother

Kim Sun-young

Soo-Bin's mother

Choi Jae-woong

Choi Myeong-jun

Moon Bin

Jung Oh-je

Jeong 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]