This manga has a protagonist with glasses, i don't know for sure but he one day took them off.
After that, he saw a "black smoke" coming out of people, making objects and such, the thing is, all those people that have this black smoke are psychopaths, and the smoke you see are actually their "favorite object" or some sort.
After the first case, he joins with some girls that can only "sense" those type of people, while he can actually see.
Anyone has any idea on what is the name of this manga? I readed it years ago and i can't find any possible reference.

Edit 1: I'm not completely sure about all the informations, some may be wrong because i'm using my memory only!

You are looking for Deathtopia

A name so obvious i'm perplexed i didn't find it before.
Thank you so much!