Severus Snape's head perked up from the books he was examining when he heard the knock on the door. His appointment. Coming from the most unexpected person, he'd have to add, he didn't think he'd ever have anything to do with the werewolf again really, other than unavoidable random meetings at public attendances. Remus Lupin had called to take an appointment for him instead, irking Snape quite a bit with a naggig curiousity about the reasons why he would want to meet one old enemy.
He stood up slowly, pushing his black robes back as he made his way towards the door. It creaked open and he looked outside, confirming it was indeed the werewolf, he stepped back. "Lupin." he greeted coldly, turning around sharply and moving towards the desk. "I hope you'll be quick. I have little time to spare."