My Centaur Roommate Asked Me to Buy Grass in the Middle of the Night

There is such a group of people who never show up during the day. They always hide here and there because of their special status. Their families are ashamed of them, and they can only move around at night. You think I'm talking about vampires? No, their scientific name is Orcs. They have animal faces at night and human faces during the day. They are animals and people. The starting point of the story was when I helped my Centaur roommate to buy grass at a convenience store. The development of the story was something I never expected... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.