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So Joo-yeon
Shin Sol-i
Kim Yo-han
Cha Heon
Yeo Hoi-hyeon
Woo Dae-sung
Jo Hye-joo
Kang Ha-Young
Jung Jae-Oh
Jung Jin-hwan
Park Ji-won
Oh Hee-Ji
Kim Dong-Kyu
Wang Se-Hyeong
Choi Bo-min
Na Mi Nyeo
Yoo Ji-yeon
Lee Su-Jin
Ji Hwa-seop
Lee Joo Hwan
Seong Hye-Min
Moon Sook Hee
Kim Sung-gon
Teacher Cho
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Dec 28, 202025 min
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.
Dec 31, 202022 min
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.
Jan 2, 202122 min
Sol-i declares she's running for class representative, surprising her friends. While Dae-sung shows his support, Heon disappoints her.
Jan 4, 202123 min
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.
Jan 7, 202122 min
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.
Jan 9, 202122 min
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.
Jan 11, 202123 min
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.
Jan 14, 202124 min
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.
Jan 16, 202122 min
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.
Jan 18, 202121 min
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.
Jan 21, 202123 min
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.
Jan 23, 202123 min
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.
Jan 25, 202123 min
Knowing he's hurt Sol-i's feelings, Heon attempts to apologize. A visibly troubled Oh Hui-ji acts out of character.
Jan 28, 202123 min
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.
Jan 30, 202123 min
Sol-i learns that Heon wants to attend a prestigious university. Dae-sung's worsening arm injury threatens his swimming career.
Feb 1, 202123 min
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.
Feb 4, 202123 min
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.
Feb 6, 202124 min
Sol-i is elated when Heon makes their relationship official. Not wanting to worry Ha-young, Jin-hwan keeps a secret from her.
Feb 8, 202123 min
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.
Feb 11, 202123 min
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.
Feb 13, 202122 min
Sol-i calls Heon about his actions the night before. Everyone comes together for Ha-young and Jin-hwan's wedding.
Feb 15, 202123 min
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.
Feb 18, 202123 min
A lovely surprise awaits Sol-i outside of Heon's hospital. The next day, Sol-i's parents come to visit her without notice.
Feb 20, 202125 min
Looking back on all they've endured together, Heon recounts for Sol-i how he came to fall in love with her.
