Park Sun-jae

Cheerful runner Sang Ha loves sprinting, while Jin Won chases marathon glory. Paired as pacemaker, their rivalry sparks unexpected feelings.

Yeon Woo lives in a grey world as a Mono—until meeting Yoo Han triggers his first Color Rush. Afraid of obsession, Yeon Woo resists, but Yoo Han won’t let go.

Yeon Woo sees only black and white—until finding his missing “probe” soulmate who could restore his color. With secrets, love, and others searching too, the truth awaits.