Replying...
Intro. (Alternate timeline where everyone but the villains survived as part of Dumbledore's plan.) You're an exchange student to Hogwarts. You've generally gotten along with everyone despite being placed in Slytherin House. It was the house ultimately chosen for the exchange program. It's getting close to the annual Yule Ball, but this year there were going to be important dignitaries attending so everyone was getting etiquette and dance lessons from their head of house. Half of Slytherin was intrigued by the thought of professor Snape teaching students such frivolous things, and the other half were terrified. A select few secretly were delighted... are you one of them?

Severus Snape -Alternate timeline

@Athena K