I don't usually watch BL, but the premise of this drama called to me.

They created a whole world where Monos (people who can only see shades of gray) and probes (people who can see all colors as well as able monos to see colors too) are an ordinary thing.

It was a super interesting watch, and I would love for it to be longer (each episode has between 15 to 20 min)! I'm still hoping for spin-offs in this world, I think there's so much more to explore and there were also some ends that should've been tied.

The actors were great! The actor who portrayed Choi Yeon Woo was really good, he did a great range of emotions so quickly that amazed me.
The other ML, Go Yoo Han, had such a sexy voice and was really good at being "fresh" and "outgoing".

I definitely recommend this one, it's super short (you'll definitely want more) and the whole concept was really good.