Daeun is moving to Seoul with her older sisters. In the elevator, she crushes with the man who lives upstairs at first sight. She entered the school...

Daeun does not give in to the wall of Seunghyu's mind and expresses her mind without hesitation. At some point, Seunghyu began to take an interest in...

The two who have a subtle atmosphere after their first date. Realizing his pounding heart, Seunghyu ask Daeun out.

Seunghyu and her relationship that seemed to be happy. However, Hong yeon, who claims to be Seunghyu's girlfriend, suddenly appears and cracks...

Seunghyu, who was trapped in a world alone, distancing himself from people. As Seunghyu's past is revealed on the surface, Daeun's anxiety is...

Daeun recalls memories of the past in an indelible wound and pain. Daeun and Yoo Il, and 'Mirae'. What happened to the three of them?

The memories of the past that Daeun wanted to forget make her suffer. By the side of Daeun, who has lost her will to live, Seunghyu and Yoo Il find a...

Seunghyu visited Hojun, and Eunha visited Daeun. Will Seunghyu and Daeun be able to overcome the growing pain and become happy again?

'Nineteen' that heal their pain in their own way. The memories of the days that were incomplete but warmer than anyone else.