Window of Opportunity

“Malfoy,” she said. She was proud of herself. It was aloof. Non-committal.
It effectively hid the fact that she was seconds away from declaring herself a basketcase and he was the reason why.
“Granger.”
Well, hello to you, too. Hermione thinned her lips, eyes narrowing with suspicion. “What is it, Malfoy?”
“I’m going crazy.”
“That’s nice,” she said, fighting hard to not have that aforementioned breakdown right then and there. What did he want? Wasn’t it enough that he’d been tormenting her for weeks now by doing exactly nothing? Why did he now have to also do something and make it worse?

(...Or what happens after your nemesis finds you masturbating in an alcove and the encounter haunts your every waking moment).