Kimhan performs on stage in a cello audition competition for a world contest. He wins the audition and becomes a Thai cellist representative. When Kim gets back to the music club, he found Sun practicing in the auditorium. Their first encounter doesn’t end up well when Kim accidentally steps on Sun’s finger, and Kim storms out the room. Meen has been looking for Kim to congratulate him on his win but ends up fighting. While Meen is bashing Kim, Sun unexpectedly observes the incident. Kim also notices that Sun is there, and that makes Sun fidgeting because Sun doesn’t want to be nosy. It turns out that Kim doesn’t think like that, so Sun wants to make friend with this unemotional new friend, leading to stories to be told.

Kim and Rain grew up in a family that demands them to take over the family business. Rain, the older brother, is expected to be an heir by his father while Kim is always being compared to his older brother. Every time Kim is hard-pressed, he always retreats to his safe zone which is in the water and his garden. At the same time, it’s Sun’s birthday, but there’s only an automatic message that wishes him happy birthday. Therefore, even though he lives in a big and crowded city, Sun feels lonely in his room.

Sun tries hard to join the band. Prof. Wannasingh sees Sun’s enthusiasm, so he lets Sun observe the band rehearsal. While the band is rehearsing, Sun suddenly has heart symptoms and notices that his bag is torn. All apples that he brought with him to soothe the symptom fell through the bag’s hole. However, Kim also notices that Sun’s bag is torn and knows that Sun needs those apples. What should Kim do when a friend who helped him is in trouble now?

Kim dives in to recall childhood memories that always make him smile and happy when he remembers that memory. At University, Rain lets Payu cool down simultaneously; Baibua brings Payu stuff and sees the moment while Rain and Payu are cooling down for each other. At the music club, Prof. Wannasingh called an urgent meeting about the classical guitarist who had an accident. As a result, the music club had to cancel the show at the closing of the ruby ceremony. Meanwhile, Sun accidentally enters the music club room. And something happens.

Pie brings Kim home, and Pie realizes that Kim has no idea about him. Kim notices Petch sends Sun to the music club. Kim is frustrated when witnessing the incident, which causes the group's rehearsal not to go smoothly. Prof. Wanasingh gives them a separate practice. But Kim and Sun are tense. And there is an argument, so they do not practice together, but there is Rain, who comes to help as a practice partner for Sun. After the rehearsal, Kim walks over to see Petch and Pie clearing up while Sun follows suit. Kim thought that Sun might like Petch. So Kim tries to prevent Sun from witnessing the significant incident.

After the music rehearsal finished, Kim sends Sun to the condo and invites Sun to go for a walk. They both talk and open up more. Meanwhile, Shun tries to approach Rain to win Rain's heart. Then, the university's rugby event kicks off. The music club has been working hard to perform at the closing ceremony. And at the closing ceremony, the club's band started playing.