Shin Sol-i harbors no secret about her affection for Cha Heon, the young man who lives next door. An inspiration strikes her; she resolves to compose a letter that perfectly captures the depth of her feelings.

Dae-sung skipped swim practice the day before the competition, opting instead for a lively evening of karaoke. Meanwhile, Sol-i felt a strong urge to offer comfort and companionship to Heon, who was struggling with a low mood.

Sol-i announced her candidacy for class representative, a decision that surprised her friends. Dae-sung offered his support, but Heon’s reaction left her feeling let down.

Driven by a yearning for the prize money needed to purchase a gift for Heon, Sol-i dedicates herself entirely to excelling in the school's athletic competition.

The class braced itself for the school play auditions. Sol-i harbored a desire to portray a love story with Heon, though persuading him proved a considerable challenge.

Following the unsettling events at the theater, Sol-i began to distance herself from Heon, the weight of the experience prompting her to contemplate a significant choice. Seeing her distress, Dae-sung arranged something thoughtful, hoping t…

Eager to audition for a television singing competition, Jeong Jin-hwan asks his friends for their support. Meanwhile, Sol-i finds herself troubled by her parents' arguments.

Heon conceded to spend a Saturday with Sol-i, who was eager to take him to a game of his beloved soccer team. However, his spirits quickly began to fade.

Sol-i felt a blush creep up her neck whenever the note of confession made her uneasy. Dae-sung, noticing her discomfort, gently reassured her it had been a jest. Meanwhile, Jin-hwan found support in confronting the individuals who tormented…

A wave of influenza swept through the community, and Sol-i became anxious at the slightest cough, often finding herself directed to the school nurse. Heon offered her quiet care in his own manner.

The days dwindle towards Christmas, and Sol-i finds herself wrestling with the question of a gift for Heon. Meanwhile, her parents exchange glances, wondering if their daughter harbors a secret affection.

During the class's outing, Sol-i orchestrates a surprise for Heon. Meanwhile, Jin-hwan disrupts Kang Ha-young's evening at the cinema.

Aware he had caused Sol-i pain, Heon made an effort to apologize. Oh Hui-ji, appearing unusually distressed, behaved in a manner quite unlike her usual self.

Hui-ji pilfers supplies from the school nurse's office. Jin-hwan ceases attending classes upon learning of Ha-young’s affections for another.

Sol-i discovered Heon’s ambition to study at a highly regarded university. Meanwhile, Dae-sung’s arm injury continued to worsen, casting a shadow over his future in competitive swimming.

Heon harbored aspirations for the future that diverged sharply from his mother’s expectations. Then, when Dae-sung’s grandmother vanished, Heon and Sol-i joined the search for her.

The tide of acceptances washing over her friends left Sol-i feeling adrift. A quiet discouragement settled within her. Heon, sensing her low spirits, offered steady encouragement and a promise of support. He would help her navigate the proc…

Sol-i felt a surge of joy when Heon made their connection public. Aware of Ha-young's sensitivities, Jin-hwan kept this development from her.

The job hunt had been relentless, a constant drain on her energy, compounded by the ever-shifting demands of Heon’s work. It was a breaking point, then, when the possibility arose that he might be leaving for America; a sudden, sharp snap o…

News of her father’s hospitalization prompts Sol-i to hurry to the hospital, where she unexpectedly encounters Heon, who has returned to Korea. Soon, the group of friends gathers together for drinks.

Sol-i reached out to Heon regarding the events of the previous night. Soon, everyone gathered, united in celebration for Ha-young and Jin-hwan’s wedding.

Heon arrived at the gathering clad in his faded school uniform, an unexpected choice that seemed to loosen his tongue. He spoke plainly, revealing the depth of his emotions. Watching him, Dae-sung felt a sudden conviction: it was time to la…

Outside Heon's hospital, a pleasant surprise held for Sol-i. The following day, her parents arrived unannounced, eager to see her.

Heon traced the familiar path of their shared history, recounting to Sol-i the precise moment his heart shifted, the unfolding of his affection for her through all they had weathered together.