Achromatopsia

-is a condition characterized by a partial or total absence of color vision.

"People with complete achromatopsia cannot perceive any colors; they see only black, white, and shades of gray - why are you glaring at me like that?" The blonde frowned as her friend rolled her brown orbs

"Come on, we all know this isn't THAT"

The blonde just sighed as she nod, throwing the paper behind her carelessly.

"Yes that's all what's this about, you're born with the vision of black and white, then your vision will bloom with colors when you meet your soulma-"

"But what if you already met your soulmate when you're a baby?"

"Ugh!! Why are you asking me?! I'm just here for coffee!!"