Chapter Text
Chapter 1: A Dare of Dubious Merit
The Gryffindor common room smelled of spilt butterbeer, burnt toast from a failed incendiary charm, and the faint, persistent tang of Ron’s trainers. It was, in other words, a Thursday.
Hermione was wedged into the corner of a squashy armchair, a copy of Arithmantic Predictions for the Coming Age propped on her knees, pretending not to notice that Lavender Brown was currently organizing the sixth years into a game of Truth or Dare with the grim efficiency of a war-time quartermaster. Parvati had been sent to guard the portrait hole. Seamus was lighting candles for "ambience" despite the fact that it was only half nine and nobody had spiked the pumpkin juice yet.
“Hermione.” Lavender’s voice cut through the chatter like a particularly irritating niffler. “You’re playing.”
“I’m reading.”
“You’re always reading. It’s anti-social and vaguely tyrannical. Put the book down or I’ll tell everyone what you said about Cormac McLaggen’s new haircut.”
Hermione snapped the book shut. “I said it looked like a dead ferret had been glued to his skull. That’s not a secret; it’s a public service.”
A snigger rippled through the group. Ron, already three fingers into a bottle of contraband Ogden’s, gave her a sloppy grin. “She’s got you there, Lav.”
Lavender’s smile didn’t waver. It was a Sphinx’s smile—lazy, carnivorous, and stuffed full of riddles she had no intention of making easy. The game commenced with the usual tedium: Neville was dared to sing the Hogwarts school song in the voice of a Cornish pixie (he managed the first verse before Parvati hexed him mute); Harry had to owl a sonnet to Cho Chang, which he did with the expression of a man signing his own Azkaban sentence; and Ron, when asked “Truth or Dare?”, chose Dare and was promptly instructed to snog the portrait of the Fat Lady.
He returned fifteen minutes later, slightly damp and wearing the dazed, affronted look of someone who has been thoroughly out-snogged by a painting.
It was, by all accounts, a spectacularly average evening of Gryffindor idiocy. And then Lavender’s glittering, gin-scented attention landed on Hermione.
“Your turn, Granger.”
Hermione held up a hand. “I decline. I have an essay on the Entrancing Enchantments of the early medieval period due Monday, and I’m already two inches behind on my footnotes.”
“You’re always two inches behind on something,” Lavender said sweetly. “Truth or Dare. Pick. Or I’ll tell McGonagall that it was your cat who hexed her hat stand.”
Hermione’s eyes narrowed. “That was your bloody kneazle and you know it.”
“Prove it.”
The entire circle was watching now, a semicircle of tipsy, over-invested jurors. Hermione felt her temper prickling, that familiar, annoying impulse to win that had landed her in so much trouble since she was eleven. She could walk away. She could stomp up the stairs and slam the door and be perfectly, smugly, entirely right. But Lavender’s face was alight with the sort of challenge that bypassed all logic and went straight for the jugular.
“Dare,” Hermione said flatly. “But if it’s anything involving McLaggen’s haircut, I’m walking.”
Lavender leaned forward. The firelight caught the glint in her eye, and for one vertiginous second, Hermione understood why people in stories made deals with devils. It was the thrill of seeing just how high the stakes could go.
“I dare you,” Lavender said, “to seduce a professor.”
A chorus of hoots and theatrical gagging erupted. Ron nearly choked on his drink. Harry, ever the helpful friend, said, “You could do Flitwick. He’s very… manageable.”
“Don’t be crude, Harry,” Hermione snapped without looking at him. She kept her eyes on Lavender. “Define ‘seduce’. I’m not going to interpret a vague dare like some sort of tragic Shakespearean heroine.”
Lavender’s smile sharpened. “Fine. A full-scale romantic conquest. Kisses, declarations, the whole nauseating business. And I want proof. Public proof. A dance at the Yule Ball. Not a pity dance. Not a ‘we’re-stuck-in-a-chaperoning-situation’ dance. I want you to make him want to dance with you, in front of the entire school, with that look on his face like he’s swallowed sunlight.”
“Which professor?” Hermione asked, and her voice was very calm, because the alternative was screaming.
The silence that fell was of the sort that usually precedes natural disasters. Lavender’s eyes were twin pools of malevolent glee.
“Snape.”
Ron made a noise like a dying accordion. Harry’s eyebrows disappeared into his fringe. Somewhere in the back of the room, Seamus dropped a candle and didn’t even notice.
Snape. The dungeon bat. The greasy git who could curdle milk with a sneer. The man who had made six years of her life a living breathing hell of red ink and gratuitous insults. Hermione’s brain began doing what it did best: cataloguing, analysing, strategizing. The sheer, breathtaking impossibility of the dare was like a cold shower. It woke her up. It made her want to prove something.
“That’s insane,” she said.
“I know,” Lavender breathed, delighted.
“He’s… he’s impervious. To everything. He’d probably repel a Cheering Charm on principle.”
“Are you saying you can’t do it?”
It was the oldest trick in the book, and Hermione walked right into it with both feet and a detailed appendix. “I didn’t say that. I’m simply pointing out that the target is sub-optimal. You might as well dare me to teach a troll differential equations.”
“So you’re backing out?”
The word ‘backing’ hit her like a slap. Hermione Granger did not back out. She did not concede. She had faced mountain trolls, Death Eaters, and her own overbearing need for academic validation, and she had never, ever blinked. A greasy Potions master with a god complex was not going to be the thing that broke her.
“Terms,” she said crisply. “If I succeed—and I’m not saying I will—what do I get?”
Lavender’s face split into a grin. “If you get Severus Snape to dance with you at the Yule Ball, and he looks even slightly less miserable than usual, I will do your Potions homework for the rest of the year. Without plagiarising. Without complaining. I will write every single essay myself.”
“Not good enough,” Hermione said. “You’ll also admit, in front of everyone, that I am the superior witch in all matters of romance and that your methods—involving giggling, hair-twirling, and the strategic deployment of Love Potions—are fundamentally intellectually bankrupt.”
Lavender’s nostrils flared. “Fine. But if you lose, you stand up in the Great Hall and declare, loudly, that Severus Snape is an irredeemable, grease-slicked, soul-destroying horror and that I, Lavender Brown, am the ultimate authority on the human heart.”
They shook on it. Hermione’s palm was dry and steady. Lavender’s was slightly clammy with anticipatory schadenfreude.
Ron looked between them with the desperate, pleading expression of a man who has just realised he is trapped in a theatre and the play is a tragedy. “You’re both mental. Absolutely, certifiably mental. He’s going to eviscerate you, Hermione. And not in the fun way.”
Harry, ever the pragmatist, said, “Is there a backup dare? Something with less chance of mortal peril? Like wrestling the giant squid?”
“No,” Hermione said. She stood, tucking her book under her arm. Her heart was hammering, but her mind was already three moves ahead, dissecting the problem into manageable chunks. “The dare is accepted. I’ll see you all at the ball. Try not to look too stunned when I win.”
She swept out of the common room, leaving a wake of stunned silence and the faint, lingering scent of burning candle wax.
The next forty-eight hours were spent in the sort of intense, silent observation that would have made a spy proud and a stalker mildly concerned.
Hermione watched Snape in Potions, in the corridors, in the Great Hall (where he poked at his food as if it had personally offended him). She noted the cadence of his speech, the way he paused just before delivering a verbal evisceration, the precise angle of his sneer when Neville’s cauldron emitted something green and sentient. She noticed that his robes billowed not with magic but with sheer, unadulterated contempt for physics and joy. She noticed, with a clinical sort of detachment, that his hands were surprisingly elegant—long-fingered, precise, the hands of a musician or a strangler, depending on his mood.
But more importantly, she noticed this: the only time the man dropped his guard, even a fraction, was in the face of genuine intellectual substance. He didn’t tolerate stupidity; that was a given. But what Hermione had never fully processed was that he was positively starved for competence. When a student managed a difficult potion correctly, he didn’t praise them—no, that would require a complete personality transplant—but he went quiet. Still. As if the machinery of his disdain had momentarily jammed.
It happened in their Thursday double period. Hermione’s Draught of Living Death was, if she said so herself, flawless. It was the colour of spoiled lilacs, with the exact, slightly viscous consistency described in the textbook. Snape paused by her cauldron, his black eyes flicking over the surface. He said nothing. He didn’t need to. The corner of his mouth did a tiny, almost imperceptible thing—a twitch that was a sneer’s more benevolent cousin. A nod, of sorts. Acknowledgment.
And just like that, the plan crystallised.
She couldn’t flirt with him. The very idea was laughable. If she batted her eyelashes, he’d probably remove them for impertinence. If she complimented him, he’d assume she’d been Confunded and send her to the hospital wing. No. The way to Severus Snape’s attention—his genuine, undivided, I-am-not-ignoring-you-because-I-am-disgusted attention—was through his ego. His vast, brittle, scholarly ego.
She was going to seduce him with her brain. Everything else could just follow along for the ride.
The plan required bait. The bait required research. She spent Friday in the library, hunched over a stack of dusty tomes, searching for a genuine, obscure, infuriatingly knotty problem in Potions theory. Not a simple question—she needed something that would hook him, something he wouldn’t be able to resist tearing apart and then, grudgingly, rebuilding. Something that would make him forget she was Hermione Granger, insufferable know-it-all, and see her as… an intellectual equal. A sparring partner.
She found it in a footnote.
Golpalott’s Third Law, that tedious little theorem about the interaction of magical essences in solution, had a footnote in Advanced Potion-Making that had always irritated her. It was on page 394. The footnote claimed that a counter-clockwise stir after adding moonstone would stabilise the potion, but the main text clearly stated that moonstone was thermally reactive and thus required a clockwise stir to disperse heat. The contradiction was subtle, easy to miss, and it had been driving Potions scholars quietly mad for over a century. It was perfect.
She rehearsed the conversation in her head until she had it down to a script. She would walk into his classroom after hours, retrieve a forgotten book (she’d planted it earlier that day, thank you very much), and then, with just the right amount of hesitant, academic curiosity, she would lay the contradiction at his feet like a cat presenting a dead mouse. He would be incapable of ignoring it. He would be compelled.
The seduction, she decided, would be a process of making him utterly unable to dismiss her. She would be the most fascinating puzzle he’d ever encountered. And if, somewhere along the way, the puzzle learned exactly how to make the Potions master’s voice drop half an octave? Well. That was just good scholarship.
Friday evening, dinner was a blur of roast chicken and Ron’s garbled attempt to talk her out of the dare. Harry kept shooting her worried looks, the sort usually reserved for people about to charge a dragon. Hermione ignored them all, her mind a sharp, humming instrument of intent.
At eight o’clock, she slipped out of the common room and down to the dungeons. The corridors were empty, the torches burning low. The door to the Potions classroom was slightly ajar, a sliver of flickering candlelight spilling into the stone hallway. She pushed it open.
Snape was at his desk, a tower of essays at his elbow, his quill scratching across parchment with the rhythm of a man who hated every single word he was writing. He didn’t look up.
“If you are here to plead for extra credit, Weasley, I should warn you that my patience is thinner than your grasp of basic safety protocols.”
“It’s not Weasley, sir.”
His quill stopped. He raised his head, and the full force of that black stare landed on her like a physical weight. Hermione felt her stomach perform a quick, complicated manoeuvre that she refused to classify.
“Miss Granger.” The name was a sigh, dripping with disappointment she hadn’t yet earned. “What fresh catastrophe have you come to document?”
“I left my copy of Advanced Potion-Making in here earlier. I came to retrieve it.”
His eyes narrowed. “You don’t forget things. You are pathologically incapable of forgetfulness. It’s one of your more tedious qualities.”
“Even I have off days, Professor. It’s on the windowsill.”
He made a vague, impatient gesture with his hand. “Take it and get out. Your aura of diligent competence is giving me a headache.”
She walked to the windowsill, her heart beating a steady, anticipatory rhythm. She picked up the book, feigning a sudden pause, then turned back. This was it. The opening move.
“Professor,” she said, and she let just a hint of genuine confusion colour her voice—not the simpering confusion of a girl seeking help, but the sharp, focused confusion of a scholar who has spotted a flaw in the universe and won’t rest until it’s fixed. “Before I go… I’ve been puzzling over a footnote in this book. Page three hundred and ninety-four. It claims a counter-clockwise stir stabilises a moonstone infusion, but the main text on the previous page explicitly requires a clockwise motion. I’ve checked three supplementary sources and they all contradict each other. I was wondering if you had an opinion.”
Silence.
It stretched, taut and glittering, like a wire about to snap. Snape’s quill lay motionless. He was staring at her now, really staring, and there was something new in his expression—a sharp, wary intelligence that hadn’t been there before. It was the look of a predator who has just detected another predator in his territory.
“You’ve been reading Golpalott,” he said slowly, and his voice was a half-tone lower, almost meditative. “Why?”
“Because it’s interesting.” She held his gaze, and she let a tiny, defiant spark flicker in her eyes. Not flirtation. Challenge. “And because the contradiction is so elegant it can’t be an accident. Someone made a mistake, and I wanted to know who.”
The corner of his mouth did that thing again—the not-quite-sneer, the almost-smile. It was terrifying and exhilarating in equal measure. He leaned back in his chair, steepling his long fingers.
“Golpalott was a charlatan and a fool. His Third Law is a monument to his own incompetence, and the footnote you’re so obsessed with was inserted by a subsequent editor who had even less understanding of thermal dynamics than a flobberworm. The correct answer is neither clockwise nor counter-clockwise; it’s an alternating stir, which Golpalott would have known if he’d ever bothered to test his theories instead of pontificating about them in overpriced journals.”
Hermione’s mouth went dry. He’d given her the answer. He’d engaged. She hadn’t even had to prod.
“An alternating stir,” she repeated, as if tasting the idea. “That would solve the heat dispersion issue, but wouldn’t it also destabilize the moonstone’s crystalline structure if the rhythm isn’t calibrated exactly?”
Snape’s eyes flickered. There. A flash of something hot and sharp, like a blade catching light. “Are you questioning my assessment, Miss Granger?”
“I’m… exploring the implications,” she said, and she let her voice soften around the edges, just a fraction, just enough to turn the challenge into an invitation. “You have to admit, it’s a more interesting problem than the ones we’re usually set.”
He rose from his chair, slow and deliberate, and the air in the room thickened. He rounded the desk, his robes whispering against the stone floor, and stopped a few feet away from her. Close enough that she could smell the faint, astringent scent of the potion he’d been brewing, the clean, dry note of old parchment. Close enough that she had to tilt her chin up to meet his eyes.
“You are not here for a book,” he said, and his voice was a silken, dangerous purr. “You have never in six years asked me a question without the subtext of ‘I already know more than you’. What is this, Miss Granger? Some sort of experiment? A dare from your dim-witted housemates to see if you can make the greasy dungeon bat dance?”
Her blood ran cold, then hot. He was a Legilimens. Of course he was. She should have Occluded. But she hadn’t, because she wanted him to see the truth—the real, burning, academic hunger. She just hadn’t wanted him to see the rest of it.
“No,” she said, and the lie slipped out smooth and easy, because it was only half a lie. “It’s not a dare. I’m bored. The curriculum is boring. You’re the only professor in this castle who doesn’t treat me like I’m made of glass or like I’m a problem to be solved, and I thought—for once—I might ask a question that was actually worth your time. My mistake.”
She turned to go, her heart pounding, her face carefully blank. She’d almost reached the door when his voice stopped her.
“Granger.”
She paused, one hand on the doorframe, and looked back. He was standing in the exact same spot, but the expression on his face had shifted. The sneer was gone. In its place was something she’d never seen before: a coiled, watchful stillness, like a man who has just been handed a puzzle box and can’t decide whether to solve it or smash it.
“If you are truly bored,” he said, and the words were slow, measured, as if he was tasting them for poison, “you may assist me in my own research. Seventh-year level. No hand-holding, no second chances. You will be expected to keep up or get out of my way. Is that sufficiently ‘interesting’ for you?”
Hermione’s heart, traitor that it was, gave a single, violent lurch of pure triumph. She kept her face calm, her voice light.
“I think I can manage, Professor. When do I start?”
“Monday. After dinner. Don’t be late, and don’t bring your friends.” He turned back to his desk, dismissing her as thoroughly as if he’d slammed a door. But just as she stepped into the corridor, she heard him add, almost too low to catch: “And for the record, Granger… you are considerably less tedious when you’re not trying to prove you’re the smartest person in the room.”
She didn’t stop walking until she was two floors up and safely behind a tapestry of Hengist of Woodcroft. Then she leaned against the cold stone wall, closed her eyes, and let the grin spread across her face like a sunrise.
The game wasn’t just on. It was, in the most deliciously complicated way possible, finally worth playing.