Chapter Summary: In which Harry finds a certain Dark Lord in an alleyway behind Privet Drive. (Harry/Tom Riddle)

a/b/o. Dubious consent.

Harry paced the streets around Privet Drive, idly walking along the sidewalk with only the moon to shine a light on him. It was the summer in between his fifth and sixth year and he didn't particularly want to go back to his room on the second floor of the Dursley house. Though it was getting cold out and he could smell the scents of his neighbors going to bed. Some of them were going through heats of their own while others were just normal, neither alpha nor omega.

Most of them weren't aware of the coming war in the wizarding world. Most of them were just figuring out whether they found their chosen mate, whether it was an alpha, beta or an omega. Harry himself had presented as an alpha last month, right around his 16th birthday. He had just found a willing enough omega and had taken them to the apartment he had rented. The guy had been a muggle so Harry hadn't thought about taking him to Potter mansion.

Now, his alpha rut was coming soon and Dudley had stopped trying to goad him into anything. Dudley was an alpha but much less… powerful as an alpha as he was. Dudley was one of those alphas who took advantage of their power over omegas, lorded it over them.

Harry sighed, glancing over at the playground where he had first seen Sirius. His godfather had just barely survived the fight in May at the Ministry. It had taken Harry a few minutes to calm him down, even before he presented as an alpha. Now, Harry had been made Lord Black and Lord Potter. Apparently, being an alpha meant a wizard could be lord of a house. With the old blood of the wizarding world, no omegas or betas could be heads of a house. The old pureblood families said that omegas were inferior, just walking wombs and sex playthings, especially male omegas.

A cry drew him from his thoughts and he turned to look down one of the alleyways across from him. Harry squinted, trying to make out anything in the darkness, and another cry settled him. He made sure he had his holly wand with him, mindful of the possibility of Death Eaters that might be ambushing him, and headed towards where the cry had come from.

Tom Riddle cried out again, writhing on the cold cement beneath him. He nearly couldn't think beyond getting to his alpha, the alpha he had scented a few months ago at the Ministry. More slick dripped down his inner thigh and he let out a strangled growl.

"Hello? Anyone there?"

He refused to bend to these asinine pheromones that said that he had to find an alpha. He refused- A choked off cry left his throat at the delicious alpha scent, the scent that was coming closer. Heat roiled in his stomach, burning throughout his body and slithering through his mind as the omega heat ignited him. Even more omega slick leaked from him, soaking his slacks further. He had long since lost his dress shirt in his mansion.

"Hey? You okay over there?"

The sound of booted footsteps proceeded his alpha arriving to save him and he yelled out, reaching out for him. The heat had already clouded his vision over with lust, with the need for alpha. He couldn't tell who it was but the scent was familiar, young, and powerful.

"Riddle?!"

The word meant nothing to him now, lost to the heat, but he did… recognize the voice. At least somewhat.

"What the fuck."

"You look young again. The fuck is going on?"

Tom writhed on the ground, finding something to rub his arse against, to get relief from the heat. The friction felt wonderful and then a hand landed on his chest, pinning him in place. He whined and tried to buck up, into the hand, only for the hand to hold him down firmly.

"Tom. What the fuck is going on? Is this a trap? Your minions around here somewhere?"

Tom moaned as the hand moved, almost of its' own accord, judging by the startled groan coming from the alpha. "I…"

"You're in heat, that much I can see. A bad heat too. You on suppressants?"

"Of course you are. I didn't smell omega from you last May."

"Riddle, you should know better by now. Taking drugs to suppress a heat can only end in this. Ah well. I should probably leave you to this. It's not like you'd help me out if I was in this situation."

His alpha removed his hand and Tom arched up, grasped the alpha's hand desperately. "My alpha."

The alpha in front of him stilled then Tom heard him let out an annoyed sigh. Tom blinked as he heard movement, felt arms come around him, gentle but firm. He tried to rub his arse against the hand holding him there and then he startled as that hand slapped his arse. The pain added to his pleasure, gave him relief from the relentless heat.

"Needy thing, aren't you? I won't have you fucked on the cement, Riddle. I wouldn't wish that on anyone, much less my enemy."

Riddle leaned into the alpha that was holding him, burrowed into him and buried his head into the crook of the alpha's neck and shoulder and inhaled. His back hit cold stone, making him freeze, then cry out as the hand came back to his stomach, sliding down, down to his cock. The hand rubbed, squeezed a little and that set him off, spiraling into his first orgasm of the night. Pleasure rode through him and he sighed in contentment, the heat moving back, giving him some space in his mind.

Some space to realize who was holding him. To realize who had just made him come.

"Potter!"

Harry snorted as he stared at Riddle, the omega in his arms. Tom was a beautiful omega now, his red eyes blown with heat and his dark brown hair ruffled. Tom had been shirtless when Harry had found him, his arse soaked through with omega slick. And apparently had been too deep into his heat that he had not recognized Harry up until now.

"Yeah, it's me," Harry offered, smirking a little. His own alpha side was reacting to Riddle's omega, wanting to dominate, to claim, and everything else be damned. "What are enemies to do when one of them turns out to be an omega? I couldn't just leave you on the cold cement, could I? I am supposed to be all noble and have a people saving thing, as you well know."

Riddle glared at him, his red eyes narrowed both with suspicion and with the omega lust.

"You're beautiful," Harry continued idly, lowering Riddle to the ground but keeping an arm around his waist. "I wonder what you would look like if I fucked you. Alpha to omega. I could use you to scare the shit out of my relatives."

Riddle kept on glaring at him. "I am going to kill you."

"You can't kill me now," Harry responded, placing a hand on Riddle's chest, moving his fingers up to tweak a nipple. "You're in heat and will be for a few days, maybe more, since I gather you're on suppressants. Besides, you don't want your minions knowing you're an omega."

"And you're any better? You will bring about my downfall."

"You've done that yourself," Harry argued, pushing some of Riddle's sweaty hair off his face. "You did that yourself when you killed my parents. Anyhow, what's with the hair and the unsnaky face? You're taking back your horcruxes, aren't you?"

Riddle was about to reply when a cry forced its' way out of his throat. Harry frowned but tugged him into a kiss, wet and hot, licked his way into Riddle's mouth. Riddle moaned and Harry smiled, using one hand to tip Riddle's chin up and trailed a line of biting kisses up his throat.

Riddle bared his throat and Harry groaned, reaching one hand down to play with one of Riddle's nipples, at the same time placing a claiming, biting mark on the crook between Riddle's neck and shoulder. Riddle screamed, coming again at the twin sensations, slumped into his arms.

"Come on. We can't stay here," Harry finally spoke, slipping arms around Riddle again and lifting. "Though… on second thought, public claiming sex. That's definitely turning me on. Later perhaps. Maybe tonight I can mark you like you marked me."

Riddle groaned and then Harry began to walk.

Riddle tried to hold in his cries as Harry jostled him while they stepped into a house. He was only half aware of where he was, only that wherever Harry was taking him to better have a bed. Was only half aware of the sudden screams coming from somewhere near him. Harry shrugged and continued to walk, moving up a set of stairs and turning down a hallway.

They entered a room and Tom startled as he was loosely dropped onto a bed. He glared up at Harry as the other man went to close and lock the door. Riddle also watched him place his hand against the door, watched as the slight glow of magic and wards hummed to life, wrapping around the room speedily.

"What the fuck are you doing?"

Harry turned to stare at him, crossing his arms. "Pardon?"

"I'm your enemy," Tom hissed out, glancing down at himself and banishing his slacks with a wave of his hand. "I'm an omega! You should kill me while you have the opportunity! I do not want to be an omega! That's why I take suppressants!"

Harry continued to stare at him, raising an eyebrow, as he came over to the foot of the bed.

"Potter! Say something!"

"You're a pretty omega," Harry offered finally, rolling his eyes. "Especially since you're… you again. I wasn't taken with the snake look. No offense."

Tom sighed, feeling the heat start to cloud his senses again. "The fuck are we doing?"

"We? You are in heat and I am helping you through it. Isn't that enough?"

His heart began to beat doubletime as heat roiled through his body again. Sweat dripped down his forehead and slick flooded his arse. Harry kneeled on the bed, his knees flanking Tom, as he leaned down to lick a path up from his inner thighs to his nipples.

Tom cried out, letting out a strangled moan as Harry moved a hand to his arse, lifting him up and placing a pillow underneath him. A finger moved to his hole, smearing some of the omega slick around his arse and Tom watched as Harry brought up the finger to his mouth, tasted it.

"Potter."

"You taste good," Harry whispered in parseltongue. "Like you were made for this."

Tom groaned, watching the young man taste him again, dipping his head to lick a stripe up his cock. Another finger made its way to his hole, slipped inside him, crooked a little and pleasure shot up his body. "Fuck…"

Harry peered up at him, smirked, and moved, shucking off his jeans and showing off his bigger cock then sheathing himself with one move. Tom cried out, bucking up into the feeling, trying to shimmy closer to feel more. Pleasurer coiled within him, making his toes curl and his fingers grasp at the sheets beneath him.

"The Dark Lord, undone by my fingers. Fitting, I think," Harry muttered, moving out then sliding back in, the omega liquid slicking his way easily. "You haven't ever been knotted before, have you? Just used toys?"

Tom shook his head, not trusting his voice. The heat was burning its way through his body, pleasure following in its wake. Each time Harry's cock hit the spot, he saw stars, pleasure building at the base of his spine. Fingers touched his cock, stroked once or twice and then came, pleasure erupting all through him. Harry cried out above him and his knot grew within Tom's omega hole.

Harry woke up three days later to an empty bed and to terrified relatives. Uncle Vernon was sitting in the dining room, fear sweat dripping down his back and forehead. Aunt Petunia was shock still, sitting in her usual place in the living room, on the couch. Dudley was sitting on the other side of the couch, sitting ramrod straight.

"Well… what'd I miss?" Harry asked, as soon as he came down the stairs.

"You were loud," Dudley whispered, his eyes wide with fear.

Harry snorted.

"I would say I'm sorry but I'm not."