From the little I can remember of this series its about this black-haired guy living on his own with a weird condition? that makes his entire body start to melt like ice when he gets near anything that produces heat

I believe theres also this girl that shows up at his apartment and catches him as a puddle on his kitchen floor, so she has to cool him down to turn him back into a solid... or something like that lmfao

Its a fairly new series from what I can tell, I hope this helps 😛

Found it! The manga's name is "Sugu ni Tokechau Hyouta-kun"

Turns out my recollection wasn't exactly accurate lol