Color Rush - Season 1

Yun Woo suffers from monochromat. In his eyes, everything is in the shades of gray colors. On the first day at Sangsang High School, Yeon Woo gets to meet new classmates. One of them is Go Yoo Han who dreams of becoming a K-pop artist. When Yoo Han takes off his mask, Yun Woo starts to see the colors.

Yun Woo recruits Yoo Han's help and together they search for his mother. As they dig deeper into the mystery surrounding her disappearance, an unexpected story begins to unfold. 

Yun Woo believes that meeting a probe will only lead both of them to tragedy. However, Yun Woo can't push Yoo Han away as he wants to experience more color rush. Meanwhile, Yi Rang goes on a trip for a while to cover a story.

Yoo Han comes to Yun Woo's place to show him the night view in colors. Yun Woo experiences decoloring for the first time after hanging out with Yoo Han more. Yun Woo finally admits that he wants to keep Yoo Han close to him.

Yun Woo thinks Yoo Han is avoiding him as he warned him about the danger of mono. However, when Yun Woo tries to accept reality, Yoo Han invites him to attend an art exhibition together. Yun Woo opens up to Yoo Han more and talks about his missing mother to him.

Yun Woo's obsession with Yoo Han grows bigger and bigger each day. He is afraid that Yoo Han might leave him and won't be able to see colors again. He even purchases tools to kidnap Yoo Han, and Yi Rang worries about him.

Yoo Han teaches Yun Woo about the shades of brown and Yun Woo teaches Yoo Han about the shades of grey. Meanwhile, Yun Woo feels sorry for Yoo Han as he thought of kidnapping him out of his obsession with colors.

Yun Woo and Yoo Han run away from the hospital to see the ocean together. Yun Woo realizes how much Yoo Han means to him as they look at the different colors in the ocean. However, Yun Woo calls Yi Rang and finds out about Yoo Han's family.