
Love is as tough as it is sweet for a lovestruck teenager, whose relationship with her next-door neighbor transforms as they grow into adulthood.

Shin Sol-i isn't shy about her unrequited crush on Cha Heon, her next-door neighbor. One day, she gets an idea to write him the perfect love letter.

Woo Dae-sung ditches swim practice before a competition for a fun night out at karaoke. When Heon is down, Sol-i wants to be by his side.

Sol-i declares she's running for class representative, surprising her friends. While Dae-sung shows his support, Heon disappoints her.

Desperate for prize money so she can buy Heon a birthday present, Sol-i pours all her energy into winning at the school's sports competition.

The class prepares to audition for the school play. Sol-i wants to act out a romantic story with Heon, but he's not easy to convince.

After the incident at the play, Sol-i begins to avoid Heon and considers a big decision. To cheer her up, Dae-sung puts together something special.

Excited to try out for a TV singing competition, Jeong Jin-hwan asks the friends to come and support him. Sol-i worries when her parents fight.

Heon agrees to spend a Saturday with Sol-i, who wants to take him to see his favorite soccer team. But his mood soon sours.

When a confession note makes Sol-i awkward around him, Dae-sung assures her it was a joke. Jin-hwan gets help facing his bullies.

With the flu going around, Sol-i frets when she has a cough and is sent to the school nurse's office. Heon looks out for her in his own way.
Created by: Choi Yoo-Jung, Jang Yoo-Yeon
Available on: Netflix, Kakao TV