Oh! My Sunshine Night

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?

Sun invites Rain to join the Fraternity and Sorority meeting. When Rain meets Sun, he is struck by Sun's friendliness and has the idea of wanting Sun to become friends with Kim. Without further ado, Rain wants Sun to change Kim’s personality to know how to make friends and socialize. After the meeting, Sun drank. Baibua asks Kim to take Sun to the condo because Baibua knows that Kim is the only person who knows about Sun's Condo.

After school, Kim notices Sun begin to relapse again. Sun hurries to find a place to hide so that no one can see. But Kim follows and sits beside a friend. Rain comes to see Payu and takes care of him, but Baibua accidentally sees Rain helping to wear a shirt. In the evening, Kim receives Pie's invitation to meet up at a café near the university, but Sun and Chun go there too. While Petch and Oh also follow Pie as well. So the chaos occurs.

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.