He's an eccentric biotech genius. His son's a pragmatist living in his shadow. To save the family business, they'll have to work through some issues.

The isolated life of an extreme introvert is thrown out of order when his company hires a new employee: a cheery extrovert who's not all she seems.

Introvert Diew cherishes his quiet life with his turtle until loud extrovert God moves in. Their balcony chats spark a friendship—without meeting face-to-face.

Khim, a reserved student, bonds with Sun, an optimistic guitarist with heart disease, amid family conflicts, misunderstandings, and challenges that shape their fate.

Ritsuka Uenoyama is bored with it all—with school, with his basketball club, and even with his one true passion: playing guitar. That is, until the day he finds his favorite hidden napping spot occupied by a strange boy cradling a broken-stringed guitar. At first, Uenoyama is nonplussed by Mafuyu Satō and his slightly odd behavior, but when, on a whim, he asks Mafuyu to sing, the power of that song pierces him to the core.