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Under the Almost-Moon

Summary:

In their sixth year at Hogwarts, with the full moon looming, Remus Lupin is struggling to keep his werewolf side at bay. When a Marauders’ prank involving rogue Firecrabs goes spectacularly wrong, Remus and Sirius Black find themselves hiding in a cramped passage, forced to confront the unspoken tension between them. As sparks fly, both from Firecrabs and feelings, Sirius’s reckless charm and unwavering loyalty push Remus to face what he’s been hiding: his heart belongs to the boy who’s always been by his side. A story of mischief, moonlight, and a love that refuses to stay hidden.

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Hogwarts, October 1976, Sixth Year

I. The Plan

The Gryffindor common room was a riot of noise and warmth, the fire crackling as sixth-years sprawled across armchairs and rugs, pretending to study for Transfiguration. Remus Lupin sat cross-legged on a worn sofa, a tattered copy of Advanced Charms open on his lap, though his eyes kept drifting to the chaos unfolding nearby. James Potter, glasses askew, was sketching a map of the third-floor corridor on a scrap of parchment, while Sirius Black leaned over his shoulder, gesturing wildly. Peter Pettigrew, perched on a stool, was nibbling a stolen pumpkin pasty, nodding along to whatever James was saying.

“Right, so we sneak the Firecrabs into Filch’s office, charm ‘em to spark every time he yells ‘Mrs. Norris!’, it’s foolproof!” Sirius’s voice was bright with mischief, his grey eyes glinting like the lake under moonlight. His hair, as always, was artfully disheveled, and his tie hung loose, a rebellion against Hogwarts’ decorum.

Remus sighed, his Welsh lilt soft but firm. “Foolproof, is it? Last time you said that, Sirius, we were scrubbin’ cauldrons for a month, like.” He adjusted his frayed scarf, the weight of the nearing full moon making his bones ache. Two days away, and the wolf was already clawing at the edges of his mind.

Sirius spun around, grinning. “Moony, my dearest cynic, have some faith! This one’s tidy, I swear.” He dropped onto the sofa beside Remus, close enough that their knees brushed. “Besides, you love our plans. Admit it.”

Remus’s cheeks warmed, and he ducked his head, pretending to read. “Tidy, my arse,” he muttered, the Welsh burr softening the edges of his words. “You’ll get us all expelled one day, cariad.” The endearment slipped out, a habit from home, and he froze, hoping Sirius hadn’t noticed.

But Sirius’s grin widened, and he leaned closer, voice teasing. “Cariad, eh? What’s that, Moony? Welsh for ‘I adore your brilliant ideas’?”

Remus rolled his eyes, shoving Sirius lightly. “Means ‘idiot’ in this context, like.” But his heart thudded, traitorously loud, and he prayed the firelight hid the flush creeping up his neck. Sirius had always been like this, too close, too warm, too Sirius, and Remus had spent years pretending it didn’t unravel him.

James, oblivious, waved his quill. “Oi, lovebirds, focus! We’ve got to time this for Filch’s patrol tomorrow night. Moony, you’re on distraction duty.”

“Always am,” Remus said dryly, but he nodded. Distraction was his role, keeping Filch or the professors occupied while the others wreaked havoc. It was safer that way, with the full moon so close. He couldn’t risk losing control.

Peter piped up, crumbs on his chin. “What if the Firecrabs explode? Hagrid said they’re temperamental.”

“Then we run,” Sirius said, winking. “Like always.”

Remus caught Sirius’s eye, and for a moment, the room’s noise faded. There was something in Sirius’s gaze, something softer, unguarded, that made Remus’s chest ache in a way that had nothing to do with the moon. He looked away, swallowing hard. Don’t be daft, Lupin. He’s just Sirius.

II. The Prank Goes Wrong

The next night, the castle was cloaked in shadow, the air sharp with autumn’s bite. The Marauders crept through the third-floor corridor, wands lit with faint Lumos charms. Remus’s breath came in short puffs, his limbs heavy with pre-moon fatigue. He’d argued against this, too close to the full moon, too risky, but Sirius’s enthusiasm was infectious, and James’s insistence that “Moony needs cheering up” had worn him down.

“Right,” James whispered, clutching a sack that wriggled ominously. “Peter, you’re on lookout. Moony, keep Filch busy. Sirius, you’re with me.”

Remus nodded, gripping his wand. “Be quick, yeah? I’m not in the mood for detention.” His Welsh accent thickened with nerves, the words rolling like a valley stream. “And don’t let those Firecrabs loose till I’m back, like.”

Sirius clapped a hand on his shoulder, lingering a second too long. “Relax, Moony. We’ve got this.” His voice was warm, and Remus hated how it steadied him.

They split up, Remus heading toward Filch’s usual patrol route near the Charms corridor. He cast a quick Sonorus to amplify a fake argument between two portraits, hoping it’d draw Filch’s attention. Sure enough, the caretaker’s raspy voice echoed, “Who’s there? Mrs. Norris, find ‘em!”

Remus slipped into an alcove, heart pounding. The distraction was working, but something felt off. The air was too still, the castle too quiet. Then he heard it, a sharp crack from the direction of Filch’s office, followed by a shout from James and a burst of orange light.

“Bloody hell,” Remus muttered, sprinting back. His legs protested, the wolf’s restlessness making every step ache. He rounded the corner to find chaos: the corridor was ablaze with sparks, Firecrabs scuttling everywhere, their shells spitting flames. James was waving his wand frantically, trying to douse the fires, while Sirius wrestled with a particularly large Firecrab that had latched onto his cloak.

“Moony!” Sirius called, half-laughing, half-panicked. “Little help?”

Remus cast Aguamenti, a jet of water quenching the nearest flames. “Told you this was a bad idea, like!” he snapped, his accent thick with frustration. “What happened to ‘foolproof’?”

“Minor hiccup!” James yelled, dodging a Firecrab. Peter, predictably, was nowhere to be seen, likely hiding.

The commotion drew Filch’s footsteps closer, his shouts growing louder. Remus’s stomach dropped. If they were caught, detention would be the least of their worries, the Firecrabs could burn half the castle down. “We need to move, now,” he said, grabbing Sirius’s arm.

Sirius, still wrestling the Firecrab, grinned despite the chaos. “Lead the way, Moony.”

They bolted, James herding the Firecrabs with a shoddy Impedimenta charm. Remus led them toward a hidden passage behind a tapestry, one they’d found in their second year. They tumbled inside, panting, as Filch’s curses echoed behind them. The passage was cramped, the air musty, and Remus’s heightened senses caught the sharp scent of Sirius’s cologne, sandalwood and rebellion.

“Well,” James said, catching his breath, “that could’ve gone better.”

“Could’ve gone worse,” Sirius countered, brushing soot off his cloak. “Moony, you’re a bloody hero with that water charm.”

Remus leaned against the wall, his chest tight. “Don’t start, Sirius. I’m knackered, and we’re not out of this yet.” His voice was rough, the Welsh lilt softening the edges but not the exhaustion.

James clapped them both on the back. “Right, I’ll find Peter and clean this up. You two stay put. Don’t do anything stupid.” He shot Sirius a pointed look before slipping out, leaving Remus and Sirius alone in the dim passage.

III. The Confession

The silence was heavy, broken only by their uneven breaths. Remus slid down the wall to sit on the cold stone, his knees drawn up. The moon’s pull was stronger now, a dull throb in his veins, and being this close to Sirius wasn’t helping. The other boy sat beside him, their shoulders brushing, and Remus fought the urge to pull away, or lean closer.

“You alright, Moony?” Sirius’s voice was quieter now, stripped of its usual bravado. He was studying Remus, his grey eyes catching the faint light from their wands.

“Fine,” Remus lied, his accent thick with fatigue. “Just… the moon, like. It’s close, and I’m feelin’ it.” He rubbed his scarred hands, avoiding Sirius’s gaze.

Sirius shifted, turning to face him. “You don’t have to pretend with me, you know.” His voice was soft, almost tentative, and it made Remus’s heart stutter. “I see you, Remus. Always have.”

Remus’s breath caught, and he forced a laugh, the sound rough. “Don’t go gettin’ all soft on me, Black. You’re meant to be the reckless one, like.”

Sirius didn’t laugh. Instead, he reached out, his fingers brushing Remus’s wrist, tracing a scar with a gentleness that made Remus freeze. “I’m serious,” Sirius said, and the rare use of his own name made Remus look up. “You’re always carrying this alone, Moony. The wolf, the pain, all of it. Let me help.”

Remus’s throat tightened, his accent spilling out in a rush. “You can’t help, Sirius. I’m a bloody werewolf, like. You think a few pranks and a laugh’ll fix that? I’m dangerous. I’m-” He stopped, the words choking him. I’m not worth this.

Sirius’s hand tightened on his wrist, firm but not forceful. “Don’t you dare say that,” he said, his voice low and fierce. “You’re not dangerous to me, Remus Lupin. You’re the best of us. Braver than James, cleverer than Peter, and-” He faltered, his cheeks flushing slightly. “And you’re everything to me.”

Remus stared, his heart pounding so loud he was sure Sirius could hear it. “What’re you on about?” he whispered, his Welsh lilt trembling. “Don’t mess with me, Sirius. Not now.”

“I’m not messing,” Sirius said, his voice raw. He leaned closer, their faces inches apart, and Remus could see the flecks of silver in his eyes, the vulnerability he hid from everyone else. “I’ve been trying to tell you for months, Moony. I’m mad about you. Have been since fourth year, when you laughed at my stupid dog joke in the library and I realized I’d do anything to hear it again.”

Remus’s mind reeled. This was Sirius, charming, reckless Sirius, who could have anyone, who flirted with danger and girls and everything in between. And yet, here he was, looking at Remus like he was the only thing that mattered. “You’re daft,” Remus said, but his voice cracked, and his hand trembled under Sirius’s. “I’m a mess, cariad. You don’t want this.”

“I want you,” Sirius said, and before Remus could argue, Sirius closed the distance, pressing his lips to Remus’s in a kiss that was fierce and soft all at once. It was like a spark, warm and electric, and Remus melted into it, his hands finding Sirius’s jacket, pulling him closer. The wolf, the moon, the chaos of the night, it all faded, leaving only Sirius’s warmth, his breath, the steady beat of his heart.

When they pulled apart, breathless, Sirius rested his forehead against Remus’s. “Told you I’m serious,” he murmured, a grin tugging at his lips.

Remus laughed, a real laugh, his Welsh accent softening the sound. “You’re a right idiot, Sirius Black. But… I’m glad, like.” He hesitated, then leaned in again, kissing Sirius softly, a promise in the quiet.

IV. The Aftermath

They stayed in the passage until James returned, dragging a sheepish Peter who’d hidden in a broom cupboard. The Firecrab fiasco was mostly contained, though Filch was still ranting about “delinquents” and “arson.” The Marauders slipped back to the common room, Remus and Sirius trailing behind, their hands brushing in the dark.

Back in the dormitory, James raised an eyebrow at their flushed faces but said nothing, just smirked and muttered, “About bloody time.” Peter, oblivious, was already snoring.

Remus lay awake that night, the moon’s pull still heavy but lighter somehow. Sirius was sprawled across his own bed, one arm flung out, his face peaceful in sleep. For the first time in years, Remus felt something like hope, a fragile, dangerous thing, but real.

The full moon would come, and the wolf would howl, but Sirius would be there. And that, Remus thought, his heart steady, was enough.