Sunlight filtered through the leaded windows, casting shadows across the stone floor of the bedroom. Harry had been awake for hours, watching the gradual brightening of the sky behind the mountains. Sleep had been elusive, punctuated by odd dreams and the constant awareness of Malfoy's presence mere inches away.

He glanced at his watch: 5:47 AM. The castle was still silent. The calm before the chaos of a school day. Harry slipped from beneath the covers and padded to the bathroom, careful not to disturb Malfoy, who was still sleeping peacefully on the other side of the bed.

He gasped, as the refreshing cold water shocked his system fully awake. Harry studied his reflection–the lightning scar still the first thing anyone noticed. Would the students see him, or just the legend? He ran a hand through his unruly hair, then gave up the battle as he always did.

When he emerged, Malfoy was sitting up in bed, his back slightly straight against the headboard, leather-bound journal open on his lap.

"You're not as quiet as you think you are, Potter," Malfoy said without looking up. "Crashing around like a mountain troll with a head cold."

"Force of habit," Harry replied, pulling fresh teaching robes from the wardrobe. "I didn't mean to wake you."

"I wasn't sleeping." Malfoy's quill scratched across the page with an irritating force. "Though I doubt anyone could sleep through your elephantine morning routine."

Harry bit back a retort. It wasn't worth starting the day with an argument. "Sleep well, then?"

"Like a baby," Malfoy drawled, finally looking up. His gray eyes gleamed with mischief. "Until someone started thrashing about at three in the morning. Bad dreams, Potter? Still having nightmares about the Dark Lord?"

Harry froze, his hands stilling on the buttons of his shirt. "Don't."

"Touched a nerve, have I?" Malfoy's smile was razor thin. "The Chosen One, still haunted by ghosts. How delightfully human."

"We all have our demons, Malfoy." Harry replied coldly. "I'd have thought you'd know that better than most."

The barb landed. Something flashed across Malfoy's face—a quick, vulnerable twitch quickly masked by his usual sneering composure.

"Your shirt's buttoned wrong," Malfoy observed, changing tactics. "Honestly, Potter, after twenty eight years on earth, one would think you'd have mastered basic dressing skills. Though your fashion sense has always been…questionable."

Harry glanced down to find he'd indeed misaligned the buttons. With a frustrated grunt, he began redoing them.

"Not your fault, really," Malfoy continued, stretching languidly like a cat enjoying its torment of a cornered mouse. "Growing up in a cupboard must have limited your exposure to proper attire. Did they keep you in hand-me-downs from the house-elves?"

"Are you quite finished?" Harry asked, his patience wearing thin.

"For the moment." Malfoy smirked, setting his journal aside. "But the day is young."

"Fantastic." Harry yanked open a drawer, nearly pulling it from its track. "And we've only got four months of this to look forward to."

"One hundred and twenty-two days, to be precise," Malfoy supplied helpfully. "Not that I'm counting."

Harry snorted despite himself. "Of course you're counting."

"One must have goals, Potter." Malfoy swung his legs over the side of the bed, revealing silk pajama bottoms that probably cost more than Harry's entire wardrobe. "Mine is to survive this unfortunate cohabitation without hexing you bald."

"Your restraint is admirable."

"I've matured," Malfoy said loftily, running fingers through his messy hair, somehow making the disheveled look appear intentional. "Unlike some people, who still dress as if their clothes were chosen by a color-blind house-elf."

"Tea?" Harry offered, heading toward their small kitchenette, ignoring the jab.

Malfoy looked up, surprise briefly crossing his face before the familiar mask of disdain returned. "Black. No sugar. And not that awful Muggle brand you were drinking yesterday. There's proper tea in the blue canister."

"Heaven forbid you consume anything touched by Muggle hands," Harry muttered, but he reached for the blue canister anyway. The path of least resistance seemed wisest.

"It's not about that," Malfoy said, his tone surprisingly serious. "It's about quality. Some things are worth being particular about."

Harry set the kettle to boil, frowning slightly at this unexpected glimpse behind Malfoy's carefully maintained facade. "Since when do you drink Muggle tea at all?"

"Since St. Mungo's night shifts," Malfoy replied, a hint of something almost like humor in his voice. "The Muggle-born healers introduced me to several…tolerable varieties."

"Will wonders never cease," Harry said dryly. "Draco Malfoy, drinking Muggle tea and teaching at Hogwarts. Your father must be spinning in his grave."

The moment the words left his mouth, Harry regretted them. Lucius Malfoy had died in Azkaban five years ago–a fact the Daily Prophet had reported with vindictive glee.

Malfoy's expression hardened. "My father is none of your concern, Potter."

"Sorry," Harry said, surprised to find he meant it. "That was out of line."

Malfoy studied him for a long moment, then gave a curt nod. The kettle whistled, breaking the tension.

Harry poured water over tea leaves, watching them unfurl in spirals of dark amber. A decade ago, he'd have suspected poison if Malfoy offered him anything to drink. Now, they were about to share morning tea like civilized colleagues. The world had gone properly mad.

"First classes today," Harry said, placing a steaming mug on Malfoy's nightstand.

"Brilliant deduction, Potter." Malfoy sneered, taking the mug. "Ten points to Gryffindor for stating the painfully obvious. Next you'll astound us all by noting that water is wet."

Malfoy took a sip, then frowned. "You've over-steeped it."

"Terribly sorry," Harry said with exaggerated politeness. "Shall I fetch the Potions Master to brew you a proper cup? Oh wait…"

Malfoy's mouth twitched. "Careful, Potter. Your sass is showing. Quite unbecoming for the saintly Chosen One."

"I've never claimed to be a saint."

"No?" Malfoy raised a pale eyebrow. "The Daily Prophet would beg to differ. 'Harry Potter: Savior, Saint, Sartorial Disaster.'" He smirked, eyeing Harry's mismatched socks. "I see they got at least one thing right."

Harry rolled his eyes. "Why are you like this at six in the morning? Do you practice being insufferable, or does it come naturally?"

"Naturally gifted," Malfoy replied without missing a beat. "Though I did minor in Advanced Irritation at finishing school. Top of my class."

A reluctant laugh escaped Harry. "I believe that."

Malfoy's eyes widened slightly at the sound, as if Harry's laughter was unexpected territory. He recovered quickly, setting down his mug and rising from the bed in one fluid motion.

"If you're quite finished providing inadequate refreshments, I require the bathroom. Some of us take pride in our appearance." He swept past Harry, then paused, leaning close enough that Harry could smell the expensive cologne that clung to him even after sleep. "And Potter? Stay on your side of the bed tonight. You were snoring. And drooling."

"I don't snore!" Harry protested. "And I certainly don't drool."

"Keep telling yourself that," Malfoy called over his shoulder. "I'm considering a Bubble-Head Charm for protection. Or perhaps a silencing spell. Though I'd hate to miss your sleep-talking. 'Oh Malfoy, you're so talented and handsome…"

"I did NOT say that!" Harry sputtered, his face heating.

Malfoy's laughter–sharp and genuine–echoed from behind the bathroom door, leaving Harry staring at the polished wood, torn between irritation and something disturbingly close to amusement.

Harry finished off his tea and retreated to the common area, sorting through his teaching notes to try and distract himself from Malfoy's infuriating ability to get under his skin. The sound of running water ceased, and Harry glanced at his watch. If Malfoy took much longer, they'd both be late for breakfast.

With an impatient sigh, Harry strode back to the bedroom to collect his forgotten lesson planner. He pushed the door open without thinking.

"Malfoy, have you seen my–"

The words died in his throat.

Malfoy stood by the wardrobe, completely shirtless, water droplets still glistening on his pale skin. Sunlight streaming through the stained-glass windows cast prismatic patterns across his torso, making the scene look almost ethereal. Tiny bubbles from some expensive magical soap floated lazily in the air around him.

Harry froze, momentarily stunned. This was not the scrawny, pointy boy he remembered. Years had transformed Malfoy's frame into something altogether different. Lean muscles defined his chest and shoulders. His abdomen was taut, sculpted. A faint scar- a remnant of their sixth-year bathroom duel–traced a silvery path across his ribs. His blond hair, darkened by water, was swept back from his forehead, emphasizing the sharp angles of his face.

For one mad moment, Harry couldn't look away. Couldn't move. Couldn't even form a coherent thought beyond a strange, unwelcome lurch in his stomach.

Malfoy's expression shifted from surprise to something unreadable as he noticed Harry's stunned silence. His cheeks colored slightly.

"For Merlin's sake, Potter!" he snapped, grabbing a shirt and holding it protectively in front of his chest. "Ever heard of knocking?"

Harry blinked, suddenly acutely aware that he'd been staring. "I–sorry–I didn't–"

"Get out" Malfoy's voice cracked slightly, a hint of vulnerability beneath the outrage.

Harry backed away quickly, shutting the door with more force than necessary. He leaned against the wall outside, heart pounding fast, his mind replaying the image of water sliding down Malfoy's chest, of light playing across unexpectedly defined muscles, of the strange vulnerability in gray eyes caught off-guard.

"Pull yourself together," he muttered to himself, shaking his head as if to dislodge the unsettling thoughts. It was just Malfoy, after all. Just his childhood nemesis who had apparently spent the last decade doing..whatever it was that resulted in looking like that.

When Malfoy emerged five minutes later, fully dressed in his teaching robes, neither of them mentioned the incident. But something had shifted between them, adding a new layer of tension to an already complicated situation.

This was going to be a very long four months indeed.

The Great Hall hummed with the excited voices of students experiencing their first breakfast of term. Enchanted candles floated beneath the ceiling, mirroring the clear autumn sky outside. Harry strode between the Hufflepuff and Ravenclaw tables, aware of the whispers and pointing fingers that followed in his wake.

"That's him. That's Harry Potter!"

" The Harry Potter? Is he really teaching here?"

"My mum says he killed You-Know-Who with his bare hands!"

Harry suppressed a grimace.

At the staff table, McGonagall was in deep conversation with Professor Flitwick. She paused briefly to nod at Harry before returning to what appeared to be a heated discussion about classroom allocations. Harry took the empty seat beside Neville Longbottom, who was enthusiastically demolishing a plate of sausages.

"Morning, Harry!" Neville grinned, pushing a platter of toast toward him. "Sleep well?"

"Not particularly," Harry admitted, helping himself to breakfast. "Still getting used to the new arrangements."

Neville's expression turned sympathetic. "McGonagall told me about the housing situation. You and Malfoy sharing quarters? Bit rough, that."

"It's temporary."

"Still," Neville lowered his voice, "if it gets unbearable, I've got a spare settee in my greenhouse office. Bit lumpy, and sometimes the Flutterby bushes make noise all night, but it's yours if you need it."

"Thanks, Neville." Harry smiled, genuinely touched. "But I'll manage. We're adults now, after all."

"Some of us more than others," Neville muttered, nodding toward the entrance.

Draco Malfoy swept into the Great Hall, his black teaching robes billowing behind him in a manner uncomfortably reminiscent of Snape. His white-blond hair was perfectly styled, his posture rigid as he navigated between the tables.

The Slytherins watched his approach with curiosity. Unlike Harry, Malfoy wasn't greeted with excited whispers, but with wary observation. His family name carried a different weight these days.

Malfoy took the only remaining seat at the staff table–directly to Harry's left. The coincidence (or McGonagall's wicked sense of humor) forced them into closer proximity than either would have chosen.

"Potter. Longbottom." Malfoy nodded curtly as he reached for the coffee pot.

"Malfoy," Neville replied, his tone carefully neutral. "Looking forward to your first day teaching?"

"Naturally," Malfoy said, adding a splash of cream to his coffee. "Though I expect half the first-years will dissolve their cauldrons before lunchtime."

"They're not that bad," Neville protested.

Malfoy raised a skeptical eyebrow. "You, of all people, are defending student competence with potions."

Neville's cheeks flushed pink, but before he could respond, the morning post arrived. Hundreds of owls swooped through the high windows, delivering packages and letters in an aerial ballet. A handsome tawny owl dropped a thick envelope beside Harry's plate, while a severe-looking eagle owl delivered a slender package wrapped in green paper to Malfoy.

Harry recognized Hermione's neat handwriting immediately:

Harry,

Ron and I wanted to wish you luck with your first day of teaching! Rose is beside herself with excitement that "Uncle Harry" will be at Hogwarts this year, though Hugo insists this means she can't get away with anything in Defense class. (He's probably right.)

We're all still planning to visit Hogsmeade next weekend–Ron says The Three Broomsticks has a new landlord who's promised to revive Rosmerta's original butterbeer recipe. Meet us there at noon?

Write soon, and remember what you told the DA all those years ago– you're a brilliant teacher, Harry. The students are lucky to have you.

Love,

Hermione…and Ron.

Harry folded the letter, glancing sideways at Malfoy, who was examining the contents of his package with a frown.

"Problem?" Harry asked before he could stop himself.

Malfoy looked up, surprised momentarily replacing his scowl. "Mother sent peppermint creams. She knows I despise peppermint."

The comment was so unexpectedly ordinary that Harry almost laughed. "Trade you for some chocolate frogs? Hermione always sends them."

"Granger still mothering you from afar?" Malfoy asked, but the usual bite was missing from his tone.

"Some things never change," Harry replied with a small smile.

Their eyes met briefly, and for a moment, Harry caught a glimpse of something other than contempt in Malfoy's expression–perhaps the faintest acknowledgement that they were both navigating unfamiliar waters.

The moments passed as McGonagall stood to distribute the day's schedules. Harry received his with a mixture of anticipation and dread. His first class: Second-year Gryffindors and Slytherins. Some things really did never change.

The Defense Against the Dark Arts classroom still smelled faintly of gunpowder and singed hair–remnants of the previous professor's hasty departure. Harry had spent the previous evening removing the more outlandish decorations (including what appeared to be a stuffed Chimaera of dubious legality) and replacing them with practical instructional aids.

He paced nervously as the second-years filled in, their young faces a mixture of awe and apprehension. Harry understood their trepidations; his own experience with Defense professors had been decidedly mixed.

"Good morning," he said once they'd settled. "I'm Professor Potter."

A ripple of excited whispers swept through the room.

"Is it true you killed a basilisk with the sword of Gryffindor?" a freckled Slytherin boy blurted out.

"Dennis!" his friend hissed. "You can't just ask him that!"

Harry smiled, determined to address the elephant in the room. "Yes, there are lots of stories about me floating around. Some true, some exaggerated, some complete rubbish. But this class isn't about my past–it's about your future."

He flicked his wand, and the blackboard displayed the day's topic: Disarming Charms and Their Practical Applications.

"The most useful spells are often the simplest," Harry continued, moving between the desks. "Today we're focusing on Expelliarmus–the Disarming Charm."

"But that's basic!" objected a Gryffindor girl with intricate braids. "We learned that last year."

"Did you master it?" Harry challenged gently.

The girl hesitated. "Well…no, but–"

"Then it's worth revisiting," Harry said, "In real danger, you won't have time to think through complex incantations. You'll rely on spells so deeply ingrained they're almost instinct."

He demonstrated, disarming a practice dummy with a casual flick of his wand. The wooden wand flew from the dummy's grip in a perfect arc, landing neatly in Harry's outstretched hand.

"The key is precision and intent. Not power." He looked around the classroom. "Pair up. Practice disarming each other. I want to see control–your partner's wand should land in your hand, not smash against the wall."

As the students scrambled to find partners, Harry reflected that teaching wasn't so different from his DA days. Different faces, same enthusiasm. Same mistakes, too–within minutes, several wands had gone flying into bookshelves and one unfortunate toad had been accidentally launched across the room.

"Gently, Mr. Higgs," Harry advised a burly Slytherin boy who'd sent his partner sprawling with an overpowered charm. "Disarming shouldn't include dismembering.

By the end of the class, most students had managed basic disarming, though few could match Harry's precision. As they filed out for their next lesson, chattering excitedly, Harry felt a strange mixture of satisfaction and exhaustion. One class down, four to go.

He was reorganizing his notes when a familiar voice drawled from the doorway.

"Starting them with Expelliarmus? How predictable."

Malfoy leaned against the door frame, arms crossed, watching Harry with an inscrutable expression.

"It saved my life more than once," Harry replied. "Including from your godfather."

Something flickered in Malfoy's eyes–a shadow of old pain. "Fair point."

Harry busied himself with straightening the classroom, aware of Malfoy's continued presence. "Don't you have a class to teach?"

"Free period," Malfoy replied. "I was curious to see the famous Harry Potter in his teaching element."

"And?"

Malfoy's mouth quirked in what Harry could have sworn was a smile. "Marginally less disastrous than I expected."

From Malfoy, this qualified as high praise. Harry snorted. "Thanks for the vote of confidence."

"The Slytherins will test you," Malfoy said suddenly. "Not just with the typical classroom antics. They'll be watching to see if you treat them differently."

Harry paused, surprised by the unsolicited advice. "Because of the war?"

"Because of everything," Malfoy replied. "Old prejudices die hard–on both sides."

Before Harry could respond, the bell rang, signaling the next period. Malfoy straightened, his brief moment of candor disappearing behind his usual mask of indifference.

"Try not to blow up the classroom, Potter. The paperwork is frightful."

By dinner time, Harry was exhausted. Five classes, each with its own challenges–from over caffeinated first-years to blase seventh-years who thought they knew everything already. His throat was sore from explaining incantations, and his wand arm ached from demonstrations.

He stumbled into the common area, intending to collapse for an hour before the evening meal, only to find Malfoy already there, seated before the fire with a stack of parchment.

"Rough day, Potter?" Malfoy asked without looking up from what looked like a student's essay.

"Is it that obvious?" Harry sank into the opposite armchair, loosening his tie.

"You look like you've been trampled by a hippogriff."

"Feels like it too." Harry closed his eyes, letting the warmth of the fire seep into his bones. "Teaching is harder than I remembered."

"The great Harry Potter, defeated by schoolchildren," Malfoy murmured, but the usual spite was absent from his tone. "How the mighty have fallen."

"What about you?" Harry asked, too tired to rise to the bait. "First day go alright?"

Malfoy set aside his quill, considering the question. "Three melted cauldrons, one minor explosion, and a Hufflepuff who somehow managed to turn his Cure for Boils into cement. About what I expected."

"Sounds like Neville's legacy lives on."

A shadow of a smile crossed Malfoy's face. "Apparently every generation produces its own disaster waiting to happen."

They lapsed into silence. Harry watched the flames dancing in the hearth, his thoughts drifting.

"We should establish some ground rules," Malfoy said abruptly. "If we're to survive four months of this arrangement."

Harry nodded slowly. "Seems reasonable."

"First: maintain appropriate boundaries," Malfoy began, ticking points off on his long fingers. "This may be one room, but we're colleagues, not friends."

"Agreed," Harry said quickly. "Second: respect for private space. Your side, my side."

"Third: schedule coordination for the bathroom," Malfoy continued. "I refuse to be late for class because you're hogging the shower."

"Fourth: no visitors without advance notice," Harry added, thinking of Ron's likely reaction to finding Malfoy in Harry's quarters.

Malfoy raised an eyebrow. "Planning social gatherings already, Potter?"

"Ron and Hermione are visiting Hogsmeade this weekend," Harry explained. "They'll want to see where I'm living."

"Wonderful," Malfoy muttered. "A Weasley reunion in our sitting room."

"They won't stay long," Harry promised. "And I'll warn you in advance."

Malfoy sighed, running a hand through his pale hair– a surprisingly human gesture from someone who usually maintained such rigid control. "Fine. But I reserve the right to be elsewhere during this touching reunion."

"Fair enough." Harry hesitated, then added, "Fifth rule: civil conversation. If we're going to live together, we might as well try to be civil."

Malfoy studied him for a long moment, gray eyes unreadable in the firelight. "Civil," he repeated, as if testing an unfamiliar concept. "I suppose we can attempt that much."

It wasn't friendship. It wasn't even particularly warm. But as they sat in the quiet of their shared space, watching the flames cast long shadows across the stonework, Harry thought it might be a beginning of some sort.

Outside their window, the sun sank behind the distant mountains, painting the sky in shades of crimson and gold. Hogwarts settled around them, creaking and sighing. And for the first time since his arrival, Harry felt the faintest stirring of what might have been hope–that perhaps this strange new chapter wouldn't be entirely defined by the battles of their past.