"One's youth is like twinkling watermelons. It is just there to shine."
A CODA (child of deaf adult) student born with a gift for music crash lands at an unfamiliar place after time traveling through a suspicious music shop. There, he forms the band Watermelon Sugar with other mysterious youths.
Jin Soo-wan, Son Jeong-hyeon
Ha Eun-gyeol
Ha Yi-chan
Choi Se-gyeong / On Eun-yu
Yoon Chung-ah
Eun-gyeol's Father
Eun-gyeol's Mother
Master
Grandpa Viva
Go Yang-hee
Im Ji-mi
Ha Eun-ho
Koo Jun-hyeong