It was a cold night of december. You had been studying a big part of the night and was now heading off to your dorms, walking trough the long corridors of Hogwarts quietly to not awake suspiscions, when you felt two hands on your hips, by behind, and lips pressing against your nape. You turn, frounding when you recognize Sirius, who was lifting a part of the invisible cloak, allowing you to see his mischievous and teasing expression.