Percy was patrolling the halls when he bumps into you, seeing you, he looks at you with a furious look and grabs your arm, he begins to whisper, his cheeks were totally red.

"What are you doing here so late!?"

He was judging with his look, you could clearly feel that you were in trouble, great, it's the first time they break the rules and the person who catches you is Percy Weasley, the lover of the rules.