Author's note: Hi. Before you read on, know that this is just dirty, dirty, dirty sex. There will be a little bit of plot as we move along, but don't be fooled - this is porn first and foremost. This is chapter one in what I hope will be a series of scenes exploring a developing sexual relationship between Severus Snape and Harry Potter. This is set in the year after the Battle of Hogwarts (although in this story, Snape never died), so Harry is definitely of age, but it will still depict a sexual relationship between a Professor and a student. I've tried to keep them both somewhat in character, but obviously, there's going to be some movement on that in order to make the story work. Also, unlike almost every Snarry fic I've read, this story is going to involve switching - i.e. both partners taking it in turns to be top/bottom. I find it more realistic than a dom/sub relationship, and I just like it better. Anyway, that's enough from me, please read on. I hope you enjoy it.

Warnings: This features explicit M/M sex between a Professor and an (of age) student. Don't like it, don't read.

Dangerous Liaisons

Chapter 1

With his hands in his pockets, Harry wandered aimlessly down the dark, empty corridors of Hogwarts, alone and lost in thought. He was tired, it was late, and he was out well past curfew, but he couldn't sleep and he literally had nowhere better to be.

Going back to Hogwarts after the war to finish his seventh year had seemed a good idea at the time, but Harry was already beginning to regret it.

After last year with the Carrows, Ginny - his on again off again girlfriend - had decided to take a year away from Hogwarts, travelling the world with Luna. It hurt that she'd left him behind, but Harry couldn't exactly complain since he'd pretty much done same thing to her last year - although, he thought bitterly, he had been saving the world, whereas she was just going on holiday...

Harry shook his head as he rounded another deserted corridor.

Fair or not, she was gone, and with Hermione and Ron so wrapped up in each other that they barely even noticed Harry anymore, Harry had been feeling pretty lonely of late. So far, life after Voldemort wasn't really living up to expectations. His other friends were living their own lives, but Harry felt as if his life was on hold. He felt separate from them all.

He still had plenty of admirers and people trying to talk with their hero of course, but Harry craved something real. He wanted to talk to someone who knew him, not just someone who knew of him. He wanted to talk with someone who didn't just see him as the boy who lived twice, but as a living, breathing person with thoughts and feelings and needs.

Harry rubbed at his crotch, trying to will away one particular need. With Ginny gone and their relationship status still up in the air, Harry hadn't really had any form of intimate contact recently. He missed it, although he wasn't sure he missed Ginny. It was getting to the point where he was giving himself wrist ache from all the wanking he was doing, but it didn't seem to satisfy him for very long. He needed the real thing.

He needed sex.

But he couldn't exactly openly cheat on Ginny – even though he wasn't sure they were even together anymore – and even if he could actually find a way to keep the liaisons secret, who was he supposed to do it with? Everyone he knew was either a friend or a worshiper? He couldn't have sex with a friend because his friends were also Ginny's friends, and he couldn't bring himself to use his 'Boy Who Lived' title to have a one night stand - not again. He'd already bedded a few girls during his off-periods with Ginny, but he hadn't enjoyed the experience as much as he'd hoped, especially when one of the girls sold the story to the Daily Prophet.

It wasn't a mistake he was willing to make again, which meant for now, Harry had no choice but to make do with his right hand only.

Harry rubbed at his crotch again and carried on walking. Combined with his loneliness, it was all leaving Harry very fed-up and frustrated. He desperately needed something – anything – to jolt some life back into him.

It was no surprise, then, when Harry rounded another corner and noticed Snape sneaking into the Hogwarts kitchens, that he only waited five minute before following him in.

The Potions Professor hadn't really changed since the end of the war, even though practically everything else had. He was still a bitter, old git - only now he was mean to Slytherins and Gryffindors alike. An equal opportunity bully instead of a discriminatory one. Harry supposed that passed for some form of progress, although it did make Harry wonder why the man had bothered to return to Hogwarts at all.

Maybe he just didn't have anywhere else to go, Harry mused. Clearly he hadn't expected to live out the end of the war. Truthfully, it was only a minor miracle that he had - that he hadn't succumbed to Nagini's venom and that Harry had managed to get help for him in time to save his life.

Not that Snape had ever thanked him for that. Harry hadn't exactly expected the man to fall to his knees in gratitude, but some sort of acknowledgment would have been nice.

Maybe that was why he wanted to follow Snape into the kitchens, Harry thought to himself. He was pissed, he was lonely, and Snape was an easy target for his frustrations. One thing was for sure; at least the man didn't see him as a hero...

He'd given Snape at least five minutes head-start before following him in, and it seemed as if Snape had made good use of that time. He was sat at one of the wooden tables, head bowed, Firewhiskey bottle in hand. There was a glass there too, but Harry couldn't tell if the man had been using it, or if he was just drinking straight from the bottle. Either way, it was clear that Snape was already pretty drunk...

"Snape?" Harry began tentatively, suddenly reluctant to work out his frustrations onto the Professor, especially since the man seemed to be struggling with his own demons.

"Potter, what are you doing here past curfew?" Snape slurred, squinting as he finally noticed Harry's presence.

Harry ignored the question and cast around for a change of subject. "I didn't know the House Elves could serve us alcohol."

Unwilling to leave anyone in such a sorry state - even a git like Snape - Harry took a seat at the table without waiting for an invitation, since he knew Snape would never give one. The House Elves had all momentarily stopped working and were watching their every move; Snape didn't seem to care and Harry did his best to ignore them, as uncomfortable as it made him feel.

"They can't serve students alcohol," Snape replied. There was a few nervous squeaks at this but Snape didn't seem to notice. "It is forbidden. Staff members on the other hand..."

"I'm of age, and I defeated Voldemort," Harry replied. "I think I deserve a drink."

Maybe if he had a few drinks himself, it would help him to get to the bottom of what the hell was up with Snape. Or maybe, drinking buddy or not, Harry just wanted a few drinks to take his mind off what the hell was up with him…

"Yes, you are of age, aren't you?" Snape said almost to himself. "A man now, in every sense of the word, I'm sure."

Harry flushed red. Snape was right - he'd had sex with those fans of couse, and he and Ginny had finally done the deed before she'd left, a lukewarm experience for both of them - but it still felt as if the man was insinuating something...

Before he could think of a retort though, Snape started speaking again.

"Well, far be it for me to get in the way of the Chosen one," Snape retorted bitterly, his words slightly slurred.

Still, he held the bottle out to Harry. It was as close to outright permission as Harry was ever going to get from Snape, so he took it. He grabbed the bottle of Firewhiskey out of Snape's hand, conjured himself a glass, and poured himself a large measure. After his first taste of Firewhiskey the previous summer, he'd developed somewhat of a tolerance for it, so he knocked it back with barely a grimace.

When Harry lifted his gaze, he noticed Snape staring at him with a vaguely impressed look on his face. Harry didn't like it, so he took another drink.

For the next twenty minutes, they drank in silence, knocking back shot after shot until Harry didn't care anymore. About that. About Ginny. About anything. And then, he drank some more.

Soon, he was as drunk as Snape, which was saying something since the man seemed so hammered that Harry wouldn't be surprised if he couldn't remember his own name. Once again, Harry wondered why Snape was in such a state, and why he'd come to the kitchens to get drunk on his own. Then it struck Harry in a moment of clarity that maybe Snape was just as lonely as he was.

The thought that he and Snape had anything in common made Harry increase his drinking speed, until he was downing the Firewhiskey like it was water.

He was nothing like Snape, he told himself. He hated Snape. He hated him…

"You're such a bastard, you know that?" Harry began, his vision slightly blurry. The alcohol had loosened his tongue but Harry didn't care. He wanted suddenly a confrontation again, regardless of the small audience of House-Elves that were still watching them closely. "I hate you."

Unfortunately, Snape wasn't in the mood to play along. He didn't even lift his gaze from the bottom of his glass. "Join the queue."

"Why did you show me those memories?" Harry asked. He took another drink; he was starting to get a really nice buzz now.

"Because you had to know."

"That I had to die?"

Snape nodded.

"After everything you'd done to keep me alive?"

Snape nodded again, then took a long drink. Harry did the same.

"Bastard," Harry slurred.

Snape nodded.

"If there was a way I could make it right, I would," Snape said quietly. He was staring at the table with bloodshot eyes and Harry wondered if he'd forgotten he wasn't alone.

"Doesn't matter," Harry said, suddenly uncomfortable. "Let's just drink."

Snape lifted his glass up in a sort of salute and then knocked it back.

"Sirs, Winky is sorry but you is needing to go now." The house elf was clearly nervous, wringing her hands. Harry was sure he knew her, but with the alcohol rushing through his veins, he couldn't quite recall how.

"You're cutting us off?" Snape said incredulously. Snape let out a bark of laughter. Harry wasn't sure he'd ever heard Snape laugh before. Even in his drunken state, it was weird.

"Headmistress McGonagall is knowing you is coming here and she is being very clear." Winky continued. "You is not supposed to stay past one o'clock."

"Oh, look at the time," Snape mocked. "Apparently it's time for me to go and get drunk somewhere else."

"Can I come?" Harry asked. He liked getting drunk and was enjoying not doing it in his own for once.

He didn't want to be alone.

Snape gave him a long considering look and apparently found what he was looking for. "If you must."

Harry nodded vigorously. "I must."

"Come along then, Potter," Snape said, standing up on shaky legs, "Lets go somewhere where we're actually wanted."

"I'm not wanted anywhere," Harry said matter-of-factly. It was true but at least the alcohol had numbed some of the pain that came from that fact.

Snape looked taken aback, then drunkenly stated, "I want you."

There was a suggestive tilt to Snape's words, and Harry wondered what the hell it meant. Did Snape actually want him in the way that Harry wanted Ginny? Did Snape…fancy him?

Harry swallowed hard and tried to work out why he didn't seem scared by that fact. If it even was a fact…

Was Snape even gay? Clearly he'd loved Lily, but did he swing both ways? And why did Harry suddenly care?

"I want you too," Harry said, the words slipping out. Where had that come from? He wasn't gay. He loved Ginny. He definitely didn't love Snape, or even want Snape. The man was his Professor, his bully for the last seven and a bit years. He hated him, he didn't want him.

It was only his loneliness and the alcohol talking, he told himself. Fuck, he really needed to stop drinking.

"Come on then, Potter," Snape said, walking to the door.

"Okay," Harry replied. Fuck what was he agreeing to? His legs seemed to be moving of their own accord as he followed his Professor out of the kitchens and into the corridor. He didn't want Snape...

Did he...?

"Do you really want me?" Snape asked huskily. He was still slurring his words and it took a second or two for Harry to understand him. Even then, he didn't reply immediately. Did he want Snape?

He wanted to be with Snape, Harry decided, whatever that meant. Snape felt real. Snape wasn't ignoring him or worshipping him. He was offering Harry more drink and something that his drunken mind didn't really understand, but it was better than being alone.

Anything was better than being alone.

"Yes," Harry replied, mouth suddenly dry.

"Then follow me."

Harry did as he was told, and soon found himself standing outside of what he presumed were the Professor's quarters. Shit, what the hell was he doing...?

"Are you coming in then, Potter?" Snape asked as the door opened. It struck Harry that as drunk as they were, Snape was still giving him plenty of opportunities to back out.

"Yes," Harry replied. Fuck...

He stepped through the threshold on shaky legs. What was he doing? Was he really that lonely that he would let Snape…?

Harry never finished the through because a second later, Snape stepped towards him, grabbed Harry by the arms, pushed him back against the wall, and forcefully smashed their lips together.

Fuck, Snape was kissing him.

It felt strange, kissing a man, especially one he'd hated for so long, but Harry found to his surprise that he wasn't exactly opposed to it. Maybe it was just the alcohol talking, but it actually felt…good. It was just like kissing a woman, only harder and with a lot more stubble. Come to think of it, it really didn't feel like kissing a woman at all...

Harry began to return the kiss before he was even aware of what he was doing. Snape tasted like alcohol and mint and something else that Harry couldn't quite work out. Harry opened his mouth and pressed his tongue against the other man's lips, requesting entry, trying to get a deeper taste.

Snape groaned loudly and pressed his body against Harry's. Harry closed his eyes as their tongues began to dance. He could feel every inch of the man's form.

Every single inch...

He immediately pulled his mouth of Snape's and pushed the man back.

"Fuck," Harry swore. His head was swimming and not just because he was completely rat-arsed. "I'm drunk, you're drunk. You're my Professor. I hate you and you hate me. What the fuck are we doing?"

Horror rushed through him. He'd been making out with his Professor...

"What are we doing?" Snape slurred. "Each other, I hope?"

"Each other...what...?"

"Sex, Potter," Snape clarified. "You're an adult now. You understand the concept, I presume."

"Probably better than you," Harry shot back.

Snape just smirked at him and Harry flushed red.

"Shall we test that assertion?"

Snape came forward again but Harry pushed him back.

"What? No..."

"Are you sure?" Snape purred. Harry felt something stir in him but he pushed it away. He wasn't gay. He liked girls. He definitely didn't like his Potions Professor...

The man was old enough to be his father - literally, since he was the same age as James Potter would have been - and he wasn't exactly an attractive specimen, as far as men went. He had a long hook nose, sallow skin, and greasy hair. He was an ugly man with an ugly personality.

But the alcohol swimming through his veins was telling him that it didn't matter. Snape was a warm, willing body, and doing things with him didn't mean that he was gay. It just meant that he was lonely and horny.

It just meant that he wanted something real.

"What do you want, Potter?" Snape asked.

He was so drunk he couldn't barely see straight and so horny that he didn't care if he was straight. Fuck, he was so screwed...

Harry took a deep breath. "You. I want you."

This time Harry was the one who initiated the kiss. They were both drunk so it was sloppy and clumsy, but fuck, it felt good. Snape was actually a good kisser. It made Harry wonder what else he was good at.

Harry felt a hand that wasn't his own grope at his crotch and he moaned against the other man's mouth. Their lips broke apart, and both of them were panting hard.

"Bed," Harry muttered, before he could change his mind.

Snape pulled Harry away from the wall, and together they stumbled through an adjoining door into Snape's bedroom. Harry's heart was beating loudly in his chest. Fuck, were they really doing this...?

Snape smashed their mouths together again and Harry moaned loudly as the man shoved his hand down Harry's pants and wrapped his long fingers around his cock. They staggered across the room, lips still locked together, Snape's hand still wrapped around Harry's hardening cock, until they hit the bed.

Harry lost his balance and landed on his back on the bed, panting hard. Snape stood at the edge of the bed and stared down at his student with heavily lidded eyes. Then, with deliberate slowness, Snape began to pull off his robes.

"Fuck," Harry moaned. He knew he shouldn't be turned on, but there was something so arousing about the impromptu striptease that Harry clumsily shifted his own pants down a little bit and began to jerk himself off before he even knew what he was doing. Maybe it was because Snape was being uncharacteristically submissive, but this was the hottest thing Harry had seen in a long time.

He liked it.

Despite the alcohol causing him to lose quite a bit of his elegance and dexterity, Snape was down to his underwear in seconds, his pale skin almost luminous in the dark bedroom. Harry stared at Snape's chest, at the small patch of chest hair and two rosy red nipples. Then his gaze fell down to Snape's crotch and the bulge hidden in his tight underwater. For some reason, Harry couldn't pull his eyes away from that spot. Snape had a dick. Harry was going to see that dick.

Fuck, he was going to see Snape's dick.

Fully aware of Harry's fascination and clearly enjoying it, Snape slowly pulled his underwater down, releasing his long, pale cock. It bobbed up to the man's stomach, and Harry moaned at the sight.

Snape was hard.

Harry had seen other dicks before - it was hard not to a dormitory full of boys - but never one in this context. What was he supposed to do...?

"Get naked, Potter," Snape ordered. So much for being submissive.

His brain still pickled with alcohol, Harry didn't question the order. Instead, Harry fumbled with his pants, struggling to get them down. His fingers weren't working properly - either due to nerves or the copious amount of alcohol he'd consumed - and he couldn't get the zip down far enough to pull the trousers fully over his hips.

Snape growled at him. "Idiot boy."

It was something that Snape had called him a hundred times before, but never before helping Harry to pull off his pants and underwear so that they could have sex.

He did this time though, and soon, he and Snape were both completely naked, Harry lying on the bed, Snape beside it, both of them panting with lust. Harry's mind was clouded, so he was grateful when Snape made the first move.

The Potions Professor dropped clumsily to his knees at the edge of the bed and gestured Harry to sit on the bed in front of him. When Harry did, Snape reached for Harry's cock, gripping the heavy organ in his pale hand. Harry hissed.

"Wait," Harry gasped out.

Snape glared at him. "What is it, Potter?"

"I need to know," Harry ground out as Snape began to slowly jerk his cock. "Is this payback? For what my dad did to you?"

"What in Merlin's name are you talking about?" Snape retorted. "This is sex, nothing more. Two consenting, albeit drunk adults, engaging in -"

"So you're not doing it to embarrass me? As payback for how my dad embarrassed you?"

"I can assure you, Potter, your father never did anything like this with me," Snape said, moving his mouth closer to Harry's dick. Harry watched the movement with wide eyes but did nothing to stop him. "No, this is payback for what you did to me."

"What did I do?"

"You saved my life."

Then Snape wrapped his thin, pink lips around the shaft and engulfed Harry's cock.

Harry moaned so loudly that he was sure people at the other end of the castle would be able to hear. Ginny had given him a few blow jobs before but fuck, this was something else entirely.

Snape was devouring his cock; licking, sucking, teeth scraping along the shaft as he bobbed back and forth. With the alcohol still rushing through his veins, it felt like something out of a dream. He was rock hard in seconds and gasping for breath.

"Shit..."

Harry placed his hand on Snape's greasy head and pushed him further onto his dick. He closed his eyes. If this is what he got for saving Snape's life, Harry really wasn't going to complain. The fact that it was a man doing this to him - a man he had spent the last seven years hating - didn't matter. A blow job was a blow job, and fuck, this was a bloody good blow job.

"Snape...oh fuck..."

Harry bucked into the other man's mouth, causing Snape to gag slightly. Harry smirked through his arousal. It felt good have Snape service him like this, especially after all the times he'd picked on him or treated him unfairly. Harry wasn't a little kid anymore. He could handle himself, and it felt good to have Snape finally acknowledge that fact.

Payback indeed.

"Fuck, that's it," Harry slurred, growing in confidence. "Take my dick, you bastard."

Snape did, greasy head bobbing back and forth. Harry thanked Merlin that he and Snape were drunk because there was no way he'd get away with talking to his Professor like that under normal circumstances. Of course, they wouldn't be here having sex under normal circumstances either...

Harry groaned. Fuck he needed more...

Reluctantly, Harry pushed Snape's eager mouth away from his dick. Then he took a deep breath and pulled his body up from the bed, standing on shaky legs. Dick rock-hard and straining following the blowjob, Harry stumbled into Snape and smashed their lips together.

He groaned against Snape's mouth. The kiss was feverish, erotic, clumsy, and it was the most arousing thing Harry had ever done. What they were doing was forbidden and dirty and wrong. Harry had a girlfriend, Snape was his Professor, his male Professor, and they were both drunk, but fuck, Harry did not want to stop.

He wanted more. He needed more.

With his lips still locked with Snape's, Harry pushed Snape towards the bed. They fell together, naked bodies writhing against each other, dicks sliding together to create the most delicious friction.

Harry had never touched another man's dick before, but he did now, wrapping his hand around Snape's leaking member. He began to jerk it slowly, causing Snape to moan loudly.

"Fuck, Potter..." Snape groaned in that low voice of his.

Harry closed his eyes, head swimming. He was too drunk to know what to do next, but Snape took the lead again. Maybe he was just more used to having drunken sex...

"Potter," Snape groaned, "My wand. Pass me my wand."

With one hand still on Snape's cock, Harry reached over to the bedside table and grabbed Snape's wand. He passed it over to Snape who, to Harry's surprise, pointed it at his own rear end. The spell was non-verbal, but judging by the short gasp Snape had emitted, Harry could guess what it had done.

Harry couldn't believe it. "You want me to...?"

Snape glared at him. "I want both, but I'm assuming you don't have any experience in this particular area."

Harry had always just assumed that gay sex was just like sex with a female, only the dick went in the arsehole instead of the vagina, but he didn't say that out loud. Snape would just mock him...

"Just do it slowly, Potter..." Snape said with a roll of his eyes. Then he pushed Harry down onto his back and straddled his hips. Shifted his body up slightly, Snape reached back and gripped Harry's cock, placing it between his cheeks. Harry's heart was thudding in his chest. Fuck, was this really happening...?

The Snape began to sink down, and Harry gasped. He had never felt anything like it. The man was so tight; it was all heat a friction and passion. Harry was so overwhelmed that he couldn't move. It was too much. He was having sex with Snape. His dick was buried in Snape's arse. He was fucking Snape...

Snape let his head fall back, eyes closed, as he slowly began to rock up and down. The man looked so utterly debauched, fucking himself on Harry's dick, that Harry almost came there and then. He managed to hold back, barely, but he knew he wouldn't last long...

"Fuck..." Harry moaned. Tentatively, he thrust up, impaling his dick deeper within his Professor. He was rewarded with a mewling moan, so Harry tried it again. Snape groaned loudly but didn't complain, and Harry took that as permission to fuck him properly.

Harry gripped Snape's hips and thrust up hard, his hips slapping against Snape's arse as he sank his dick deep into the other man's tight passsageway. Snape pushed down hard, knees spread wide, meeting each unforgiving thrust with a roll of his hips, and it wasn't long before Harry felt the pressure mounting deep in his stomach. He was close…

Harry thrust up hard again, this time eliciting a wild scream from Snape. He aimed for the same spot again, and again, and again, until Snape was sobbing for release. Harry grabbed the man's dick and began to jerk it without mercy. He wanted Snape to cum first. He needed Snape to cum first. He needed to have power over the man for the first time in his life...

"You like this, Sir?" Harry said breathlessly, burying his dick in his Professor's arse over and over again. "You like being fucked by your student?"

"Yes…" Snape hissed, bouncing up and down on Harry's cock. "Merlin, yes..."

"You owe me," Harry told him, thrusting up again. "You owe me."

"I do."

"Then cum," Harry ordered, jerking the man's dick in line with his own erratic thrusts. "Fuck...cum!"

"Oh, fuck…"

"Fuck!" Harry cried, his dick still sliding in and out of the Professor. He was so fucking close.

"Fuck, Potter!"

"Cum!"

"Fuck!"

And then the man was coming, spurting his juices all over himself and all over Harry's stomach. Snape's arsehole clenched as he rode his climax, and that was enough to throw Harry over the edge too. He managed one more thrust, two, and then...

"Fuck!"

Harry released himself deep inside the other man, white crossing his vision as he rode the best orgasm he'd ever had. It was too much. It was everything...

"Fuck…" Harry gasped, his body limp with exhaustion. His softening dick was still buried in Snape, but the man in question looked like he was about to fall down at any minute.

"Fuck…" Snape agreed tiredly. Then, as expected, he collapsed sideways onto the bed, falling off Harry's sweaty body and landing beside him. Harry had hissed when his dick had slid right out of Snape's tight arsehole covered in cum, but could hardly work up the will to protest. The alcohol and sex was catching up with him fast. He could already feel his eyes closing…

"Fuck," Harry mumbled. Snape had closed his eyes already, and Harry couldn't help but be a little bit proud - amongst all the shame he was feeling - that he'd fucked the bastard into unconsciousness. It certainly wasn't the way he'd thought his evening would go, but admittedly it could have gone worse. Sex with a man was a new experience, but at least when he was with Snape, he wasn't alone.

Harry closed his eyes with a smile on his face as he lay there beside his naked Professor. Definitely better than being alone, he thought drunkenly.

And then in seconds, he was asleep.

Author's note: Well, I hope you liked it! I'll try and post the next chapter soon, but no promises. In the meantime, I'd love to hear your thoughts on the story so far! And if you've got any suggestions on what you'd like to see next, please let me know!