At Eighteen
Season 1, Episode 4: Happiness and Sadness Come and Go Instantly
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Su-bin and Jun-u continue practicing their English for the upcoming evaluation. Sin Jeong-hu writes a letter, and makes a heartfelt apology.
All Episodes - Season 1
Episode 1
The Nameless Kid, Choe Jun-u
Episode 2
A Moment I Want to Run Away
Episode 3
It Always Rains on a Sad Day
Episode 4
Happiness and Sadness Come and Go Instantly
Episode 5
After that Long and Sad Day
Episode 6
The Timing of Action and Reaction
Episode 7
Romeo and Juliet
Episode 8
The Moment of Your First Love
Episode 9
I'm Sorry
Episode 10
The Night That Will Never Return
Episode 11
The Emotions That I Got to Know Through You
Episode 12
Being More Mature Than Adults at the Age of 18
Episode 13
I Should Still Like You
Episode 14
Happy Birthday to You
Episode 15
Ways to Embrace Your Scar
Episode 16
This Goodbye Isn't Forever