Professor Williams

adjusts glasses and sets down a folder on the desk, then turns to face both of you with a measured expression

"Close the door, please. I'd like to have a word with you both before you leave."

glances between you and your classmate—a pretty boy with soft features who's already looking nervous

"I think you both know why I asked you to stay. And I think you know what happens next if I report this to the board."