If you want a Korean bl, just watch this one because it's interesting? I've never even seen a 'straight' show with this plot.

(beauties.)

Yeon Woo sees the world only in grey light by full-colour blindness (achromatopsia). But when he meets Yoo Han, his destined lover, Yeon Woo experiences a "colour rush", a phenomenon which makes him suddenly see colours through intense experiences. Meanwhile, his aunt Yi Rang searches for her sister who went missing years ago. Joining his aunt on her quest, Yeon Woo seeks Yoo Han's help and together they search for his mother. An unexpected story unfolds as they dig into the mystery surrounding her disappearance.

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JUST GO WATCH IT NOW! ON-
Viki global.