It is the first love romance story of the cheerful high school girl Shin Sol-i and her childhood friend Cha Heon who is living next door and for who she has a one-sided love.
Sol-i calls Heon about his actions the night before. Everyone comes together for Ha-young and Jin-hwan's wedding.Watch Now:Amazon
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.Watch Now:Amazon
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.Watch Now:Amazon
It's almost Christmas! While Sol-i racks her brains on what to get Heon, her parents wonder whether their daughter has a crush on someone.Watch Now:Amazon
Sol-i learns that Heon wants to attend a prestigious university. Dae-sung's worsening arm injury threatens his swimming career.Watch Now:Amazon
When the class goes on a trip outdoors, Sol-i plans a surprise event for Heon. Jin-hwan ruins Kang Ha-young's night at the movies.Watch Now:Amazon
Hui Ji steals from the school nurse's office. Jin Hwan stops coming to school when he finds out about Ha Young's crush on someone else.
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.Watch Now:Amazon
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.Watch Now:Amazon
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.
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.Watch Now:Amazon
Sol-i is elated when Heon makes their relationship official. Not wanting to worry Ha-young, Jin-hwan keeps a secret from her.Watch Now:Amazon
Knowing he's hurt Sol-i's feelings, Heon attempts to apologize. A visibly troubled Oh Hui-ji acts out of character.
Struggling in her job search and with putting up with Heon's demanding work schedule, Sol-i snaps when she finds out he may be leaving for America.
As all her friends get accepted into college, Sol-i feels down about herself. Heon encourages her to keep trying, and promises he'll help.Watch Now:Amazon
Heon's plans for his future don't align with what his mother wants. When Dae-sung's grandmother goes missing, Heon and Sol-i also look for her.
Heon shows up to a gathering in his old school uniform, and gets honest about his feelings. Dae-sung decides it's time to bare his heart to Sol-i.Watch Now:Amazon
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.Watch Now:Amazon
A lovely surprise awaits Sol-i outside of Heon's hospital. The next day, Sol-i's parents come to visit her without notice.
Hearing her dad's been hospitalized, Sol-i hurries over — and bumps into Heon, who's back in Korea. All the friends gather for drinks.Watch Now:Amazon
Looking back on all they've endured together, Heon recounts for Sol-i how he came to fall in love with her.Watch Now:Amazon
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.Watch Now:Amazon
Sol-i declares she's running for class representative, surprising her friends. While Dae-sung shows his support, Heon disappoints her.Watch Now:Amazon
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.