The Mystery
At first, nobody noticed anything unusual about Sirius Black striding into the Great Hall. He was always excessively confident, a walking spectacle, so the way he smirked and carried himself wasn’t particularly different from any other day.
No, the problem—the mystery, rather—began when he sat down at the Gryffindor table, grabbed a piece of toast, and turned his head just enough for the light to catch on the unmistakable dark hickeys along his neck.
There was a beat of silence as the realization sank in. Then, whispering.
Marlene nearly dropped her goblet of pumpkin juice. “Merlin’s beard.”
Lily blinked at him. “Are those—”
“—hickeys?” Mary finished, staring.
James, seated across from his best friend, immediately choked on his tea. “What the bloody hell happened to you?”
Sirius, the bastard, just smirked. He grabbed a fork, twirled it between his fingers, and shrugged. “Oh, you know. Had an eventful night.”
“With who?!” James practically shouted.
At that, Sirius only gave a particularly self-satisfied grin.
And just like that, the entire table was invested.
Theories began flying before breakfast was even over.
By the time the Gryffindors returned to the common room, a full-fledged investigation had begun. James was leading the charge, determined to uncover the identity of Sirius’ mysterious suitor.
A large piece of parchment had been tacked up over the fireplace. At the top, written in bold letters:
"WHO SNOGGED SIRIUS BLACK?"
Below it, Peter was furiously scribbling down notes as people shouted theories from across the room.
Marlene crossed her arms. “It has to be someone from another House. We would have known.”
“But where did it happen?” Lily asked, examining the hickeys with an investigative squint. “Dorms? Common room? Astronomy Tower?”
James rubbed his chin, looking entirely too serious about the matter. “Maybe it was a secret rendezvous?”
Sirius, sprawled out lazily on one of the couches, looked absolutely delighted by all the attention. “Mmm, yes. Very scandalous.”
James pointed an accusatory finger at him. “You’re enjoying this.”
Sirius grinned. “Oh, immensely.”
Remus, sitting beside him with a book open in his lap, let out a dramatic sigh. “This is the dumbest thing you lot have done in a while.”
James ignored him, turning to the room. “Alright, suspects. Who have we seen Sirius flirting with recently?”
A few people shouted names.
“Hufflepuff seventh-year?”
“No, she’s dating someone.”
“What about that Ravenclaw with the blue streak in her hair?”
Sirius made an offended noise. “Ravenclaws? James, please.”
James crossed his arms. “Well, someone did that to you, and I’m going to figure out who.”
Sirius propped his chin in his hand, feigning boredom. “Best of luck, mate.”
Remus turned a page in his book, biting back a smirk.
By lunchtime, the investigation had spread beyond Gryffindor.
Over at the Ravenclaw table, people were whispering, glancing over at Sirius like he was some kind of grand unsolved puzzle. Hufflepuffs had a betting pool running (Marlene had put five Galleons on it being a Slytherin).
Even some of the Slytherins were side-eyeing him with mild curiosity.
James, bless him, was still running full-speed ahead.
“I know it wasn’t anyone in Gryffindor,” he muttered to Peter as they walked toward Charms. “No one here would have been able to keep it quiet.”
“What if it was someone under a Glamour Charm?” Peter suggested.
James stopped in his tracks, eyes going wide. “Wormtail, you genius. That explains why we haven’t figured it out yet!”
Remus, walking just behind them, rolled his eyes. “You’re both absolutely insufferable.”
Sirius, walking beside him, chuckled. “You’re just mad because you’re not part of the fun, Moony.”
Remus gave him a look. “Oh, I’m plenty entertained.”
By dinner, James had lost his mind.
After an entire day of hunting for clues, interrogating people, and even bribing Peeves to spill any secrets (which resulted in nothing but Peeves singing a very inappropriate limerick about Sirius), James had hit a dead end.
“I CAN’T BELIEVE THIS,” he groaned, slamming his head down on the Gryffindor table. “IT’S IMPOSSIBLE.”
Sirius, cutting into his steak, smirked. “Told you.”
James sat up, looking like a man on the verge of an existential crisis. “I don’t understand! We know it happened last night, we know it must’ve been someone in the castle, but there’s no record of where you went—”
Lily patted his shoulder. “Maybe you should accept that you’re never going to figure it out.”
James gasped. “I refuse.”
Meanwhile, Remus sat in an armchair, flipping through Advanced Defensive Spells with an expression of deep, exaggerated boredom. “This is ridiculous.”
“It is not,” James shot back. “This is serious.”
Remus snorted. “Yes, very Sirius.”
James ignored him. “We have to consider possible suspects.”
Marlene tapped her chin. “What if—hear me out—it’s someone we’d never expect?”
Remus didn’t even glance up. “Like me?”
The room erupted in laughter.
“You?” James wheezed. “Remus, mate, no offense, but you are the last person on earth who’d be caught dead snogging Sirius Black.”
Remus hummed, turning a page. “Right.”
It took approximately ten more minutes of chaotic theorizing before Sirius himself finally strutted in. “Still on about my love life?”
“Yes,” James said immediately. “And we will solve this mystery.”
Sirius just smirked, plopping onto the couch and draping himself across Remus’ lap. “Good luck with that.”
Remus, without missing a beat, ran a casual hand through Sirius’ hair.
James, in the middle of hypothesizing a dramatic secret romance with a Beauxbatons student, froze.
His eyes flicked to Sirius. Then to Remus. Then back to Sirius.
His gaze snapped to Remus, who was—suspiciously—very focused on his book. Too focused.
And then James thought back—back to all the times Remus had dismissed the investigation, the way Sirius kept glancing at him, the way he always seemed mildly amused whenever James was running in circles trying to solve the mystery.
He pointed a shaking finger between the two of them. “No. NO.”
“Oh my God,” James whispered.
Sirius grinned, positively delighted.
James looked betrayed. “IT WAS YOU?!”
Remus finally glanced up from his book, arching a brow. “You just figured that out?”
Marlene choked on her pumpkin juice. Lily clapped a hand over her mouth. Peter looked horrified at how obvious it had been all along.
Sirius, stretching again, nudged Remus’ cheek with his nose. “Told you they’d be slow.”
James made an inhuman noise of frustration. “YOU LET ME RUN AN ENTIRE INVESTIGATION—”
“I found it entertaining.”
“HOW LONG HAS THIS BEEN GOING ON?!”
Sirius nuzzled into Remus’ neck, voice annoyingly smug. “Long enough.”
Remus just smirked and turned another page.