One evening after dinner in the Great Hall, Severus Snape sat alone reading his copy of Advanced Potion Making at one of the long wooden tables.
"Oi, Snivels," James Potter called.
"What do you want?" Severus muttered.
"We're playing a game of truth or dare," Sirius Black said, appearing beside Severus.
"What do you say?" James said, taking Severus's book away.
"No thanks," Severus told them, reaching for his book that James held away.
"Lily Evans said she would play," Sirius said nonchalantly.
Severus dropped his arm. Sirius smirked while James's smile faltered a little. Severus took the moment's chance to grab his book away and slammed it against the table.
"Fine," Severus said grudgingly, "I'll play."
Sirius grinned at James and said, "Alright, we'll be playing at the Quidditch in about ten minutes. Bring some of your Slytherin buddies. What do you say? Gryffindors versus Slytherins?"
"...okay," Snape muttered.
Sirius and James got up and started to walk away, but Severus grabbed James's sleeve.
"If this is some prank, you'll be sorry," Severus growled.
"Relax, Snivellus," Sirius said, rolling his eyes, "we don't care about so much as to create an elaborate plan just to screw you over."
Severus let go of his sleeve, sneered, stood, and strolled off in the other direction to find some Slytherins to take part in the game. First he found Lily to be sure she was going as well.
"Lily?" he said, keeping a few steps away from her seat.
She turned and smiled. "Hey, Sev. What's up?"
"Did Potter say anything about truth or dare to you?"
"Yeah. It sounds like fun. Are you going too?"
"Yeah."
"Great! See you soon."
Severus smiled, waved awkwardly and went off to the Slytherin Common room. He managed to round up Mulciber, Avery, Narcissa, Wilkes and Rosier to play. They were more than eager at a chance to make fools out of the great Gryffindors. They met James, Sirius, Lupin, Pettigrew, and Lily by the entrance to the pitch.
"Let the first ever Gryffindor versus Slytherin truth or dare match begin," smirked James.