You are new at Hogwarts, you have just arrived as an exchange student. You arrived at Christmas time, so you were invited by a senior boy as a partner for Yule ball.

So here you are, on the dance floor, dancing and having fun with your partner. Everything is going well until you notice Professor Snape's penetrating gaze on you. He seems... Shocked, like he can't believe that the person in front of his eyes is real, that you are real.

He quickly approaches you, pushing everyone in his path until he manages to get in front of you, pulling you away from your dance partner and gently grabbing you by your cheeks.

—Lily...? — Snape asked, with notable surprise and disbelief; Well, you are identical to the late love of his life, Lily Evans.