Author: Mosh
Fandom: Harry Potter

Title: Mottoen B Longville: Potions Expert
Pairing: Snape/Harry
Rating: NC-17
Summary: Severus decides to test a potion on Harry.
Disclaimer: These boys belong to J.K Rowling. No money being made, no copyright or trademark infringement intended.
A/N: Many thanks to my lovely betas, Mekare and Lise. This is another very, very early fic of mine - you have been warned. *g*

Note: You may not archive, re-post, or alter any of my stories without my permission. Please contact me first. Thanks!

"What exactly does it do?" Harry said, eyeing the glass of pea-green coloured liquid with trepidation.

Severus's eyes flickered down to the glass in his hand. "It will cure your headaches," he said simply. "I used a formula I found in one of the new texts on next year's curriculum, one I haven't tried before." The potion made a strange hissing noise, then a bubble rose to the surface and popped. "It's very potent - I added a few special ingredients to strengthen its effects. It should have you feeling better almost immediately."

Well, that sounded all right, Harry thought. He had no reason not to trust Severus, not after three years of more-often-than-not wedded bliss. He took the glass and drained it as quickly as he could, because a lot of Severus's concoctions tasted vile. And this one was no exception. "Eugh." Harry handed back the glass, pulling a face.

"Give it a moment," Severus said, looking at him intently. "You should start to feel it working soon."

Although Harry was growing weary of being Severus's test subject, the near-constant pulse of pain in his temples did seem to be fading, his head feeling clearer than it had in days. "I think it is, I feel better already," he said, grinning. He took in a deep lungful of air, but then became aware of a tingling sensation building in his belly, which started to spread lower, eventually pooling in his groin. He automatically looked down at himself, wondering what was going on. "Uh, Severus... something else is happening..."

"Hm," came the reply, though it didn't sound like Severus was particularly surprised.

Harry looked up with a questioning frown. "What have you done?"

Severus raised an eyebrow, shrugging his shoulders casually. "Nothing," he said. "I just thought I'd tweak it a little. It should make you feel very relaxed." His eyes trailed down to Harry's trousers, then widened. Harry felt a flush rise up his neck and spread over his face, knowing that Severus was looking at the bulge that had suddenly appeared. Against his will!

"You gave me an aphrodisiac?" Harry gaped, half-tempted to throw something at Severus and half wanting to jump him.

Severus looked quite dumbfounded, although he couldn't seem to tear his gaze away from Harry's trousers. "I did nothing of the sort." He licked his lips and swallowed. "I only meant to give it a residual relaxation after effect."

Suddenly, Harry's hips jerked forwards. "Christ! What did you put in that stuff?" It felt like someone had tied a length of rope around his prick and was currently pulling him forwards with it. He stumbled a couple of paces towards Severus, glaring at him.

"I... nothing out of the ordinary, I simply added a teaspoon full of crushed Antipodean Opaleye dragon eggshells to the mixture to enhance it," Severus said, staring down at Harry's groin with mild concern. "I've never botched a potion that simple before," he added, with a far greater degree of concern. "I followed the book to the exact, there was nothing to indicate that by adding crushed dragon eggshells it would change the properties of the mixture. They shouldn't be having this effect."

Harry tried to remain balanced, but he needed to shag something soon. "You're supposed to be an expert! What kind of person writes a book full of dodgy potions that ends up on the school curriculum anyway?"

Severus tried to recall the ridiculous sounding name of the author. "Mottoen B. Longville, or something equally pretentious; he's quite new to the potions field..." He shook his head. "I can't understand it, though some were a little obscure, he did seem to have a reasonably good grasp on basic healing potions-"

"What?" Harry all but shouted. "Mottoen B. Longville? You have absolutely no idea who that is, do you? Do you ever listen to me when I talk to you? I've been trying to tell you for weeks that Neville finally got published, his pseudonym being-"

Severus's face sank. "Mottoen B. Longville... Neville Longbottom?" He shook his head as if it were the most ludicrous thing he'd ever heard. "Merlin's left arse-cheek, how the hell did Longbottom manage to get himself published? I thought he was working at some shop in Diagon Alley."

"He was!" Harry shouted, taking another involuntary step forwards. "He went for an apprenticeship at Slug and Jigger's Apothecary after you passed him in his Potions N.E.W.T - he said he wanted to continue with it and eventually write his own book on healing potions!" Harry floundered towards Severus, landed against him hard, then started rubbing himself up and down his leg, before gasping, "How long is this supposed to last?" and then, "How could you do this to me?" shortly followed by, "If you don't let me shag something soon, I think I'm going to explode!"

Severus acted quickly, muttering sincere apologies under his breath as he tried to undress Harry. Harry wriggled, trying to hump his leg, which made it all the more tedious. "Hold still for a moment, will you?"

"I can't," Harry said between clenched teeth, squirming in discomfort. Once naked, he managed to stumble through to the bedroom, dragging Severus behind him.

Severus realised that it wasn't Harry's fault, as he undressed quickly. And, though he hated to admit he'd made a mistake, it was entirely his doing. So he lay down on the bed, linked his legs around Harry's waist as Harry stood between his thighs, and accepted his fate.

It wouldn't go down as the most earth shattering of sexual experiences. The swearing, for a start - Severus hadn't heard half the words that tumbled effortlessly out of Harry's mouth before, and was quite sure that most of what he was moaning about was illegal, not to mention potentially life-threatening. After a quick bit of preparation, Severus ground his teeth and thought of England as Harry thrust into him with one hard stroke, sweaty hands pinching his hips too tightly, and his own hands clutching the bed spread from fear of being shagged off the edge of the planet. A couple of clumsy thrusts later, Harry's fringe found its way into Severus's mouth and he gagged. It tasted bitter, mostly likely from that ridiculous Mr Squeaky-Clean shower gel that Harry used in the mornings.

"You could at least try to make this somewhat enjoyable for me," Severus said, spitting the offending hair out of his mouth as Harry's hips jerked between his thighs.

Harry moaned an incoherent answer, raising himself up onto his hands at either side of Severus's shoulders, then rotated his hips as he thrust in again. This time, Severus gasped and tried to raise his lower body for more, feeling that the whole shambles of a situation might not be as unbearable as he had first thought. If only Harry could hold on so that he could catch up. He pushed down on Harry's next thrust, and holy hell, white sparks burst behind his eyes.

Oh yes. Severus reached down, took his cock in his hand and started to fist it in time with Harry's uncoordinated rhythm, realising that he could indeed get used to this, if only...

"Could you do that hip rotation again-"

Being a top wasn't all it was cracked up to be anyway, Severus decided - a shiver of pleasure rolling through his body - it was far more effort than simply lying here, letting Harry do all the work. Harry's thrusts quickly grew harder, deeper, shining beads of sweat falling from his hair onto Severus's shoulder and chest. Severus looked up at him; watching him draw his lower lip back behind his teeth, little moans and growls escaping his throat. He was quite the picture to behold. Severus began working his hand harder, that glorious tension that was promising release building in his balls... Harry slammed into him and then stilled with a strangled groan, back arching inwards. Severus felt the twitching vibrations of Harry's prick deep in his arse, wanting nothing more than to yell at him to keep going.

Harry fell down against Severus's chest in a sweaty lump of exhausted young limbs. Damn! Severus's hand was trapped between them, still wrapped around his erection, so he moved it as best he could while Harry lay panting against his neck.

"That feels so much better."

"For you, maybe."

"Oh. Sorry." Harry fell to Severus's side on the bed, then sat up with a blissful I've-just-had-sex smile on his face. "I suppose I forgive you," he said, drawing Severus's hand away from his cock, then wrapping his own around the head and sliding it down. Before Severus could point out that it was partly Neville's fault too, Harry's other hand followed the first, which, once it reached the base of his shaft, moved back up to repeat the motion. All thought evaporated, and Severus found himself pushing up through the sweaty tightness, but every time he felt the head of his cock break through, Harry would bring his other hand down over it until it felt like Severus was engaged in a gloriously tight, never ending penetration. Harry kept it up until Severus was clawing at the bed, and only then did he dip his head and take Severus's cock into his mouth, sinking down onto it as Severus thrust up and then came with a contented sigh.

Harry crawled up the bed and lay down, slinging his arm over Severus's chest. "I strongly suggest you take Neville's book off the school's reading list for next year," he said.

Severus kissed Harry's forehead, and when he pulled away he looked thoughtful. "Definitely... but, although you see today as a disaster, I think it could have been worse. This is Longbottom we're talking about, after all. Merlin knows what other potentially lethal potions he's discovered and seen fit to unleash upon the Wizarding World."

Harry grinned. "Mm, almost unleashed upon a school full of kids too." He planted one or two kisses on Severus's shoulder, before realising. "Hey, technically, I just saved the world again... well, the school anyway. I mean, if I hadn't tried that potion then the book would have been used at Hogwarts. And if there are any lethal potions in it-"

"Who was it that brewed the potion in the first place?" Severus pointed out.

"Yeah, but you could brew a million potions and it wouldn't mean a thing until you had someone to test them out on-"

"Shut up will you, I feel like I've just been splinched." Severus untangled himself from Harry, rose from the bed and headed towards the door. "What's the name of the publishing house that has seen fit to take Longbottom in?"

"Obscurus Books," Harry said. "Why?"

"I'm going to write them a letter immediately, and hopefully they'll be able to re-call all of Longbottom's books before they're purchased by the unwitting public." Severus reached the door and stopped. He didn't turn, but added, "I think we should try a variation more often. I quite enjoyed doing it like that."

"Really? You actually wouldn't mind bottoming once in a while?" Harry said. But Severus didn't answer, only moved through to the living room without a backwards glance.

~Fin~