Yeon-woo, neurologically colorblind, sees colors through Yoo-han in a "color rush." Their connection intertwines with the mystery of his missing mother.
Choi Yeon-woo
Yoo Yi-rang
Jung Joo-haeng
Kang Min-jae
Go Yoo-han
Kim Se-hyun
Kim Ye-won
Sang-jae
Kim Hyeon-joo