Key: A small piece of shaped metal with incisions cut to fit the wards of a particular lock, which is inserted into a lock and turned to open or close it. Katsuki hated keys, he couldn't stand the sight of them. He found them annoying. That's what his classmates concluded. in reality, Katsuki hated himself for his fear of keys. His fear of what had happened before. Unfortunately, the class doesn't understand the key to this mystery. Not until they find the right keyhole for their key. [contains: angst, gore, and torture]