manga where the seme hears colours with sounds, and the uke has to show him the perfect sound in order to get his manuscript or something? Rings a bell?
You reminded me of the pink-haired girl from Sunday Without God. It is not even related though. (=・ω・=) Following.
Like synesthesia? I've read it before, I can't remember tho...
I think it's called Mr. secret floor.
Following~
manga where the seme hears colours with sounds, and the uke has to show him the perfect sound in order to get his manuscript or something? Rings a bell?