Doomsday’s local demon addict

Earth isn’t the same anymore, same goes for humans. A 19 years old boy illegally sell demons. One day, he gets caught and given two options: go to prison or go to a special university. Since the university seemed less depressing, he accept the proposition . But as his stay begins he realized everyone seemed to dislike him. Maybe going to university was a bad decision? Jin Maki, the protagonist, is a lazy 19 years old guy who actually has a pretty important role in the illegal business of selling demons. Will he be able to stop his addiction and change for the better? Or will his constant bad luck and the hate around him make it worse? This story is kinda random and slightly ridiculous please don’t mind it... Also, the rights for the cover belongs to me and obviously the story too. (Inspiration taken from the novel “world best martial artist” by eagle eats the chick.) The main protagonist doesn't fall in love with anyone, the only romance will be amongst the side characters. So, no sweet sweet love.