A Love So Beautiful

Shin Sol-i, who has long harbored feelings for her neighbor Cha Heon, decides to take action by writing him a heartfelt love letter.

Woo Dae-sung skips a crucial swim practice before a competition to spend the night at a karaoke bar. Meanwhile, Sol-i expresses her desire to support Heon during a difficult time.

Sol-i announces her candidacy for class representative, catching her friends off guard. Dae-sung expresses his support, but Heon's reaction leaves her disappointed.

Determined to raise money for Heon's birthday gift, Sol-i dedicates herself to competing in the school's sports event.

The class begins preparing for the school play, and Sol-i expresses interest in performing a romantic scene with Heon, though he proves reluctant to participate.

Following a tense incident at a school play, Sol-i grows distant from Heon and faces a significant choice. Dae-sung tries to lift her spirits by organizing a thoughtful gesture.

Jeong Jin-hwan prepares for a televised singing competition with the support of his friends, while Sol-i deals with tension at home caused by her parents' arguments.

Heon accompanies Sol-i to a soccer match, but his initial reluctance becomes evident as the outing unfolds.

Sol-i becomes uneasy after receiving a confession note from Dae-sung, but he insists it was meant as a joke. Meanwhile, Jin-hwan seeks support to confront the bullies he's been facing.

When Sol-i develops a cough amid a flu outbreak, she becomes anxious and is taken to the school nurse. Heon quietly watches over her, showing his concern in a subtle and thoughtful manner.

As Christmas approaches, Sol-i struggles to find the perfect gift for Heon, while her parents speculate about whether she has a crush.

During an outdoor class trip, Sol-i organizes a special event for Heon, while Jin-hwan inadvertently spoils Kang Ha-young's movie night plans.

Heon tries to make amends after realizing he has upset Sol-i. Meanwhile, Oh Hui-ji exhibits unusual behavior that suggests she is dealing with some personal distress.

Hui-ji is caught stealing from the school nurse's office, while Jin-hwan withdraws from school after learning that Ha-young has a crush on someone else.

Sol-i discovers Heon's ambition to get into a top university, while Dae-sung faces uncertainty as his arm injury continues to hinder his performance in swimming.

Heon's aspirations for his future clash with his mother's expectations. After Dae-sung's grandmother goes missing, Heon and Sol-i join the search for her.

Feeling left behind as her friends receive college acceptances, Sol-i struggles with self-doubt. Heon offers his support, vowing to help her through the process.

Sol-i is happy when Heon publicly acknowledges their relationship. Meanwhile, Jin-hwan withholds a secret to protect Ha-young from potential distress.

Sol-i becomes increasingly frustrated with her job search and Heon's hectic work schedule, leading to tension in their relationship when she learns he might be moving to America.

Sol-i rushes to the hospital after learning her father has been admitted and runs into Heon, who has returned to Korea. The group of friends reunites for a drink.

Sol-i contacts Heon to discuss his behavior from the previous night, while the group gathers for the wedding of Ha-young and Jin-hwan.

Heon attends a gathering wearing his old school uniform and opens up about his emotions. Dae-sung resolves to confess his feelings to Sol-i.

Sol-i receives an unexpected visit from someone at Heon's hospital. The following day, her parents surprise her at the hospital without prior warning.

Heon reflects on their shared experiences and tells Sol-i the story of how their relationship began and how he gradually fell in love with her.