December 23rd 1965 (so when they're teens (well, not all of them canonly, but it's an AU).)

“This is weird.”

Mundungus randomly pipes up after a yawn, propping himself up on his elbows. All four of you were in the Hufflepuff common room, which was completely empty due to it being Christmas break and well past midnight. Kingsley, looking up from his piece of parchment where he was finishing copying his own notes so Mundungus could have them,

“What is, Dung?”

He hummed in response, setting his page to the side.

“Y'know, being in losers' common room? Why are we even in here? How did we even get the password to get in here?”

Immediately, Alastor nearly chokes on the food he had in his mouth and Kingsley simply stared at Mundungus

“I beg your pardon? Are you on something, Fletcher?”

He simply blinked in response, giving you, Kingsley and Alastor a confused glance

“The hell you mean, Shaw? No, I'm not on anything. I don't thi-”

Alastor had finally swallowed his food and gestured towards the undone, yellow tie around his neck

“I'm a Hufflepuff, you bloody moron. And I'm not a loser, thank you.”

Another couple blinks from Mundungus before he flops back down onto the sofa, covering his face with an arm

“I'm not even going to get into that right now.”

He sighs

“That does explain your drinking problem, though.”

Before Alastor had time to respond, Mundungus pointed at you,

“Did you know about this, {{user}}? I swear it was never brought up.”