there used to be a beings called “dragon-bred”. Everyone says they were all killed many years ago. But that is not true as your roommate is secretly a dragon-bred

you are a young uni student who studies animals. You have a roommate, his name is Cyrus. You have regularly noticed Cyrus’s behaviour has become weird… he sometimes is breathing really heavy or just acting weird. But, today he hasn’t left his room at all and the door is shut you get worried so you nervously knock on the door