Snarry-a-Thon22: FIC: No Defence Against the Dark Title: No Defence Against the Dark Author:zalil Other pairings/threesome: none Rating: Explicit Word count: 1730 Content/Warning(s): Established Relationship, No violence but a bit of danger, anal sex, frottage, demonic possession, body modification of the demonic kind Prompt: No. 001: Wild Card Summary: After handling his DADA material, Harry might have changed a bit lately. Severus doesn’t approve. Or does he? A/N: As ever, endless thanks to the amazing LikeLightInGlass for unlimited cheerleading and support. Also, massive thanks to WeAreTheLuckyOnes for catching my most embarrassing mistakes.
It was glaringly obvious at any time of day, but Severus thought it definitely worst at breakfast. Where usually a bleary-eyed young man was sipping hot chocolate and picking at a piece of toast while he was slowly waking up, there sat a disgustingly cheery creature, brimming with energy from the almost-raw meat the elves now served him for every meal.
Minerva had tried to address the issue, of course.
"Harry, are you feeling well? Your eyes seem a bit… reddened?"
He had waved her off with thanks for the inquiry and a very toothy grin. Severus’ blood had run cold when he had realised just how many teeth he had presented. And had they been sharper than before?
Today was already the fourth day of the predicament and Harry was nowhere nearer an insight that something was wrong with him.
"Did you sleep well, Harry?" Minerva asked, resigned to his new attitude.
He neglected to answer and kept eating, tearing the meat right from the bone with his teeth instead of using cutlery.
Minerva sniffed disapprovingly.
"I must insist you join us for a nightcap this evening, Severus," she said.
Severus made a non-committal noise and shared a look with Harry, whose twinkle would have been incredibly charming, had it not appeared in crimson eyes.
There was no need to join the staff meeting they were going to hold behind Harry’s back. Severus hadn’t been there but he knew how careless Harry was with the books and artefacts left to every DADA instructor. He could vividly imagine the boy cutting himself, dripping his blood into an ancient urn or smearing it across the pages of an old tome about blood magic and cursing in front of it. It wouldn’t need more than that to awaken a demon and get possessed.
The students were terrified, of course, especially the lower years, which Severus found to be a nice change. Even now, you could tell who was scheduled for double DADA by the frantic whispering and eyes darting to the Head table. Since there was no reasoning with Harry, however, and the demon had been rather benign so far, nobody dared disturb the peace, so everything went on as usual. Severus himself was used to living in permanent terror and this Harry was a great deal more agreeable than the Dark Lord had ever been.
"See you later," Harry said, squeezing Severus's thigh rather more forcefully than probably intended, and slipped out of his place to head to his classroom.
Severus had to shut down a few questions about him in his classes. It was the first time the students had ever thought he was someone they could turn to to be coddled – and the last, if he could help it.
"There will be no talking about other professors," he insisted and took points from a group of third year Ravenclaws.
"Talking about people’s appearances is shallow and in bad taste," he advised two Hufflepuff girls and took points again.
"Professor Potter’s eating habits are none of your concern, Barcroft. Five more points."
In the evening, he briefly considered joining the staff meeting and dismissed the idea again. He returned to their quarters where Harry was already waiting for him, patting his spot on the sofa.
"Were your classes that bad? You seem stressed," he said, helping Severus out of his teaching robes and starting to knead his shoulders.
"You know the children," Severus said and leaned back into the massage.
The slight prickle of danger that had his hair stand on end made turning his back on Harry even more exciting, the slide of his strong hands on Severus’s skin even more sensual. They retired to the bedroom soon after, with Harry still hungry, though no longer for the meat he’d been wolfing down at dinner.
"Like this?" Severus asked when they had tumbled into bed, were lying face to face and he was slowly, steadily stroking Harry.
In response, Harry burrowed closer to him, brought their bodies flush together and rubbed against him in a delicious tangle. It was comfortable and familiar and as Severus closed his eyes and let his hands run down Harry’s body in the rhythm of their thrusts, he almost forgot what was different now. Until he opened his eyes and found crimson watching him back lovingly. The reminder gave him a jolt that brought him over the edge, spilling hotly between them. Harry moved faster against him, following soon after.
Wiped down with a summoned cloth, Severus was ready to fall asleep. The sex had released at least some of his permanent tension – not that he was fully relaxed now that he was going to sleep next to the demon – and he was knackered. Harry, however, had other ideas.
He huddled closer and Severus felt his cock against his side, hard again. Harry’s hands roamed freely on his body, nudging his nose, lightly trailing down his neck, over his nipples and down his stomach, finally arriving on his thigh. He pulled his legs slightly open and ran his hand between them.
"Will you let me?" Harry asked, almost shyly.
Severus swallowed. He did not like giving up control on his best days and not only was this the first time Harry asked, it was also not just Harry.
A shiver ran down Severus’ spine and he knew how he would answer before he could even properly think about it.
Humming his consent, he turned onto his stomach.
In a flash, Harry was between his legs, lifting his arse into the air and exposing him with terrifying strength. The fingers caressing him were soft, however, as was the tongue following in their wake. There was an eerie silence in the room as Harry licked him while holding him in place with strong hands on his arse cheeks.
As his tongue went deeper, Severus started to worry again. He had done this, before Harry, and knew how far tongues were supposed to go and this was far, far deeper than should be physically possible. When he felt it curl inside him, Severus couldn’t help but cry out, which Harry seemed to take as a good sign, repeating the motion. Severus felt himself start to tremble and shake right from his spine, tethered to sanity and safety only by the feeble thread of concentration he was determined to uphold in case the demon turned malicious.
Due to Harry’s ministrations, he was half-hard again and oscillating between fear and arousal until both were mixing in a dizzying spin. Little gasps were escaping him, making Harry chuckle, which he felt resonate through his body.
Deeper and deeper the tongue burrowed and it broadened too, making him ache at the stretch around the intrusion. Bearing down against it and letting Harry in went against every instinct, but Severus complied, knowing that he didn’t want to stop now. When the tongue’s surface turned rough and rubbed against his strained rim in firm, calculated thrusts, Severus pressed one hand against his cock. Two pulls and he pulsed again, with only a dribble of semen left to spill. He collapsed in a boneless heap on the mattress, steadied only by Harry’s hands that held his arse in place while it was contracting around the demon’s tongue.
"...you okay?" Harry asked after he had pulled it out of him again, slowly running a thumb through the saliva around his hole, pressing against the ring of muscles in a way that made Severus ache for more.
"Yes," Severus answered, muffled by the pillow. "Go on."
"Brilliant," Harry said, summoning lube from a drawer and clicking it open with one hand while keeping his thumb dipping inside Severus’ arse.
The head of his cock didn’t seem much larger than his tongue had when he pressed it against Severus, which was a rather alarming realisation concerning his ability to transform. It was large enough to make him wince, however, when Harry slid in in one thrust, unused as Severus was to the intrusion.
Harry left him no time to ponder his discomfort, rocking into him quickly and shallowly and Severus could only imagine his poor, abused hole reddened by the friction. As Harry gained confidence, he thrust deeper, shoving Severus forwards with every movement.
"Fuck yes," Harry breathed, "get a pillow underneath, come on..."
Severus complied and shoved down a bundle of bedsheets to tilt his hips up. He was rewarded with Harry climbing on top of him, covering his whole body with his and pinning him down until he couldn’t move an inch. When he was settled, Harry slid right back home.
"Yesssss…," Harry hissed, "you feel – so – fucking – good."
He punctuated every word with a snap of his hips against Severus’ arse, driving his breath from him until he felt dizzy. The arm around Severus’ chest that was holding them together was strained and tense and sweat was dripping from Harry’s face onto his back in small drops.
In time, the discomfort eased and Severus fell into a pleasant state of trance. Immobilised save for the rocking motions, he had no choice but to let Harry use him as he liked and, knowing that, he could finally let go of all illusion of control and feel.
Harry’s breathing turned into loud groaning as he got closer and closer to completion, until he stilled midway through a particularly hard thrust and stayed inside him, trembling and pulsing.
The tension in his body left quickly and he pulled out and moulded himself around Severus’s form like a cat.
Severus lifted his upper body to give his lungs room to fill and turned around towards him. Harry was watching his come drip out of Severus with an expression of satisfaction, running his fingers through the wet trail.
"Nice," he said in an unfamiliar tone of voice, dragging out the s sound, and grinned broadly.
Severus had just turned back when a slap on his hole startled him into choking on his spit. He took a deep breath and waited until Harry had finished his lazy exploration, climbed up and pulled the covers out underneath him and over both of them.
Pleasantly exhausted, Severus noticed he was nodding off without any trace of his instinct of self-preservation.
Oh well. The demon seemed to be sated for now.
Maybe Severus would join the regular staff meeting on Thursday. There was no hurry.