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When Harry was dared to drink a potion that showed you your deepest fantasy, he didn’t really expect to see his sworn enemy. And especially not looking like… well. Like an actual terrifying monster.
It all started when his daft friends decided that they wanted a break during the last D.A. meeting before Christmas. Harry, always the leader, asked Hermione if it’d be all right. Surprisingly, she agreed that they’d been working hard enough through these months and a bit of fun wouldn’t hurt anyone.
They all sat in a circle around the floor and started talking about their classes or of gossip they had heard in the hallways. Harry was just glad to be able to lie down before the end of the day, to unwind surrounded by friends in a lighthearted mood. He would have been perfectly content if that was all they’d be doing, but then two people cleared their throat to get everyone’s attention.
The twins, of course.
“So, you may be wondering why we gathered you all here tonight.” Fred started.
“We were here for the D.A. What are you on about?” Ginny chimed in.
“Thank you, dear sister, insightful as always. Now, if everyone is done with their interruptions.” They pulled out a bunch of vials from their bags and spread them on the floor. “We introduce you to our newest invention: Liquid Dreams.”
Harry rearranged himself so he could listen to the new ways to break the rules —if not the law— that the twins had come up with. The twins continued before they could give Hermione time to stand up and voice her concerns.
“I know what you’re thinking. Gred and Forge are not only an irresistibly handsome duo but also two brilliant minds who just created something you didn’t even know you needed before today!” George continued.
“Literally no one was thinking that.”
“Sister! We will discuss this bad habit of yours later. For now, let us explain. You have all heard of Liquid Luck before—”
“Overrated,” George added.
“And wildly overpriced!” Fred continued. “Why would you even want a couple hours of luck when you can spend a whole day in paradise? Our Liquid Dreams are exactly what you’re looking for and more. One vial is enough to show you your heart’s greatness desire and—”
“There’s a mirror that does the same thing,” Ron looked thrilled to have ruined the twin’s speech with his commentary. The twins didn’t falter.
“Yes, the mirror of Erised. An artifact so rare that no one here has been lucky enough to encounter—”
“Oh, we found it back in our first year.” Harry grinned. The twins kept their rehearsed composure.
“Of course, of course. We’re talking about us, the common folk, dear Harry. And before anyone else adds their two sickles,” Fred cut in smoothly. “Let us clarify. This is nothing like that outdated piece of furniture. For starters, our creation doesn’t just show you some vague wish or half-formed ambition.”
“Unlike certain mirrors, Liquid Dreams allows you to interact with the object of your desire.” George emphasized.
“With just one vial, your mind constructs a fully immersive scenario of your choosing for a limited time. You’re not merely observing a scene unfold in front of you. You’re part of it. And you decide what happens and how both parties respond to it.”
“And yes, the experience feels entirely real. You may even perceive physical interaction with your chosen desire, despite it all taking place inside your head,” Fred finished.
They beamed, clearly proud. The rest of the room was entirely silent for a moment. Ginny was the first one to break it with her fit of laughter. The rest of the group followed suit, to the growing confusion of the twins.
“So, basically you just created the perfect tool that allows perverts to live out their darkest fantasies with no consequences whatsoever?” Ginny explained what probably most of the room was thinking —Harry certainly was. The silence that followed was deafening.
“Well… When you put it like that—” The rest of the students burst out in laughter once more.
“This isn’t funny.” Hermione stood up all of a sudden. “You can’t just generate a sexual fantasy at the expense of other people! Especially if they don’t even know it’s happening. It’s unconstitutional!”
“Your insight is well appreciated, as always.” George started. “We may have to do some tinkering to prevent our contribution to society to be used for evil deeds.”
“In the meantime,” Fred pointed towards the vials on the floor, “here is our beta version. Who wants to be the first one to try it out?”
There was a long silence in the room before Hermione interceded once again.
“You can’t be serious! We just told you why this would be a bad idea and now you’re asking us to try it?”
“Now, now, Hermione. We trust you all not to abuse these great powers we are bestowing upon you. Think of it as a way to help us make changes with an honest review.”
Hermione looked like she was about to retort but Luna beat her to it.
“I think it’s a good idea. I’m curious to find out what I will see. I can’t think of anything right now.”
“That settles it, then.” Fred started passing out vial after vial to everyone in the room, to Hermione’s dismay.
Harry turned the vial between his fingers. He noticed it was a clear liquid —almost looked like water, except that tilting it towards the light revealed some iridescent swirls.
“Is it safe for all of us to just… drink it?” Cho looked somewhat doubtful, but still opened her vial.
“I refuse to take part in this sick experiment. I’m leaving!” Hermione grabbed all her things and moved towards the door. She did a double take before exiting and directed her furious gaze towards Ron. “Well?”
“Right!” Ron stood up quickly and left his potion on Harry’s hand. “Sorry mate, gotta go.” He followed Hermione out of the room while the rest of the D.A. watched them.
A couple other members stood up to leave as well. “Yeah, no. Sorry, I don’t think I want to spend Christmas holidays stuck in the hospital wing because I tried some Weasley’s untested potion.” Zacharias Smith voiced his displeasure. The rest of the group expressed similar concerns on their way out.
The room was now empty, except for the twins, Ginny and her boyfriend, Cho, Luna, and Harry. He wasn’t particularly interested in experiencing the effects of a Weasley creation, but he usually was the last one to leave the room, after making sure everyone got out with no trouble. It didn’t feel right to leave the group to fend for themselves, especially when he wasn’t sure if the potion would kill them on spot.
And, honestly? He was the tiniest bit curious himself. Not like he would admit it, though.
“And there were seven left.” Fred grinned.
“What are you waiting for? Bottoms up! Or we won’t make it to our rooms before curfew,” George added.
“Aren’t you lot going to drink as well?” Ginny asked while holding her opened vial.
“Of course not, we are here for research!”
“And damage control, if necessary.”
“Well, that’s reassuring,” but she still finished her drink in one go.
Her boyfriend followed her example and finished his potion. “I know what I’m going to see,” he said while smirking in her direction.
“I’m starting to think this was a bad idea, Fred. Can we still ban him from the experiment?” George groaned.
“Oh, shut it,” Ginny replied while rolling her eyes.
In a moment everyone but the twins and Harry had finished their potions. Harry found himself somewhat excited: he did want to know exactly what this version of a heart’s desire would entail —or what the potion would conjure up for everyone. He wouldn’t have to wait long to find out.
“Okay, just remember, whatever you see, it isn’t real, so—”
A loud gasp interrupted George’s explanation. They all turned around to look at the source of the noise: it was Cho. She had stood up and was looking at some point in the distance. She started trembling while her eyes filled with tears. She ran straight for the door and left the room without another sound.
“Er…” Harry started. “Should we go after her?”
“She’ll be fine. Some people don’t like confronting their own feelings. It can be some sort of revelation. Let her lick her wounds,” Fred answered him.
“In the meantime, Luna. Anything you wanna share with the class?” George added.
“Hmm, I don’t feel any different. Maybe there are a bit too many nargles. But that could just be because it’s winter.”
“Of course. What about you little sister?” They turned to look at Ginny. “Er… are you okay Ginny?”
Ginny looked horrified, gaze alternating between an empty space in the corner and Harry, for some reason. He met her gaze and could have sworn he saw her flush.
“Luna is right. This isn’t working,” she quickly grabbed her things and sprinted towards the door. Her boyfriend only took a few seconds to react before following her. “Wait, where are you going? I couldn’t even—” His voice got cut when the door shut.
“Oh! I should go too. Thank you for the drinks.” Luna bid her goodbyes and left.
The twins stared at the door and sighed in indignation. “Well, there goes our research.”
They were already spouting their laments when they turned and looked at Harry, then looked at each other, then at Harry again and smiled.
“No.” Harry said firmly and decided it was time to pack his things and go.
“Oh, please Harrykins! This is a matter of science!” Fred started.
“The future generations will thank you!” George continued.
“Still no.” Harry refused, stuffing the rest of his books and notes into his bag.
“I see. Someone is afraid of what they might see.” Fred chuckled.
“Oh, it can’t be.” George gasped dramatically. “Harrykins, are you worried you will see a certain Malfoy in your fantasies?”
Harry nearly dropped his things upon hearing such an atrocious accusation, and decided the most appropriate response was to fake a gag. “That’s disgusting. Don’t ever put the words Malfoy and fantasies in the same sentence. I’d rather kill myself.”
The twins burst out laughing on the spot. “We might’ve gone too far.” Fred admitted. “I wouldn’t wish that evil on anyone.”
“Alright then.” George said, wiping a tear from his eye. “If you’re not scared of your own desires, try it. We dare you. Not for us. For science!”
Harry stopped to consider it. On one hand, Harry knew he could just leave the room and tell the twins he wouldn’t be part of whatever game they were trying to play. On the other, Harry had never been good at backing down from a dare. And he wasn’t afraid of what he might see. If anything, he could always lie to them. It’s not like they would know what was going on inside his head.
“Ugh, fine.” Harry downed the vial the twins had given him and waited.
By then, anticipation had already begun to coil in his chest, and he found himself wondering what image his mind would choose to manifest. The twins were watching him, expectant as well.
That was when Lee Jordan blasted through the door, breathless and panting, as if he’d sprinted from the opposite end of the castle.
“Found you. Thank Merlin.” Lee said in between breaths.
“Lee, I love you, but we’re in the middle of--” Fred was cut off.
“It’s Angelina!” Lee interrupted. “And your latest invention! The Perpetual Chews she asked to try for her training? The effect is not stopping. She’s been doing laps around the pitch for an hour now and just shouted something about breaking school records. Professor McGonagall is on her way and she does not look amused. It’ll be no time before Umbridge joins her.”
Fred swore under his breath.
“We told her to take half.” George muttered.
“You need to come now, before the toad arrives and decides to ban her from Quidditch altogether.”
The twins stood up without hesitation. George paused long enough to look back at Harry. “Sorry, mate. Bad timing.”
“We’ll make it up to you.” Fred added quickly. “Tell us your experience tomorrow. And, thanks for helping. Really.”
With that they left the room, the door shutting behind them with a soft click.
Harry sighed in defeat. “Great.”
He was starting to gather his things again after deciding he would rather sleep the effects of the potion off in his dormitory, when he heard it.
“We meet again, Potter,” a serpentine voice murmured to the room.
Harry let out a shriek and turned to see the monster that had been hunting him since he was old enough to talk. But, he looked different. He didn’t have legs, for once. He looked… like a snake. An actual snake, like he fused half of his body with nagini. His entire lower half consisted of a strong, long tail —full of dark scales— that made him look taller than he actually was. His entire torso was naked, toned skin still a pale greyish tint, though it appeared to glisten —not quite due to scales but something similar. His face was the same —almost. Except for the eyes. They were glowing red, like something ripped straight out of a horror film. It looked monstrous.
Harry didn’t understand what was happening. He pulled out his wand and pointed it at Voldemort —trying his best to keep his arm steady even though his whole body felt like it would start trembling at any moment.
“How did you get in? We’re at Hogwarts. You shouldn’t be able to—” A manic laugh cut him off, slowly dissolving into low chuckles.
“Oh, Potter.” Voldemort said softly. “You still don’t understand, do you? You summoned me.”
Harry’s grip tightened. “What are you talking about?”
“Your mind,” Voldemort continued. “Such a twisted little thing. Fascinating, really, that you harbour such… affection for this form. The original goods would be thrilled to know.”
Harry took a step back, wand still trained on him. His hand was shaking, but he refused to lower it. “This can’t be— This isn’t—”
“Oh, but it is.”
Voldemort stepped —slithered?— forward and placed his hand over Harry’s. And Harry could feel it. He felt the cold skin on top of his hand. It didn’t feel like an illusion.
“Stupefy!” Red light burst from Harry’s wand, streaking across the room and slamming into one of the D.A. dummies they were using earlier. The spell passed straight through Voldemort’s image.
Yet Harry could still feel the hand on his. His breath stuttered.
Is this the effect of the potion?
That makes no sense. I would never—
Voldemort’s hand shifted, cradling Harry’s face. “Oh, Harry. If I’d known this was what you dreamed of all this time, I might have taken you right there in the cemetery. I suspect you would’ve liked it.”
Hearing his name from the monster’s tongue sent a shiver through Harry. He felt himself flush despite it all. Something warm started to form inside of him. He couldn’t tell if it was from fear or anticipation.
Harry shoved him away and stumbled backwards until his spine hit the wall.
“No, I would never dream of this.”
But a memory stirred. Several memories during sleepless nights. Where loneliness gnawed at him and his thoughts turned dark, seeking anything to dull the ache of living with the Dursleys, of feeling unworthy and replaceable. Seeking pain or punishment. Something overwhelming enough to silence everything else.
And who else could embody pain better than the one who had tried to hurt him since before he was born? It wasn’t conscious —or at least that’s what Harry wanted to believe. But it was here now.
He caged Harry in —serpentine body blocking his escape, one hand next to his head and the other on his neck.
“You poor, repressed thing. Can’t even admit what you want to an empty room.” He slid his hand downwards from the nape of Harry’s neck. To his abdomen. To his waist —lingering there, caressing his side.
“I’m not here to hurt you.” He continued. “No one will ever know your darkest desires. You won’t disappoint anyone by admitting how much I unsettle you. You want me to take you. To make you cry. To make you scream.”
Heat flooded Harry’s face once again, his body betraying him even as his mind rebelled. He lowered his head and murmured his refusal. It felt weak even to himself.
Voldemort lifted a finger, tilting Harry’s chin upward. “Look at me.”
He leaned in. “May I remind you, Harry, that you are the one controlling this fantasy?”
And then his mouth was on Harry’s.
It was savage and messy —teeth clashing, a forked tongue slipping past Harry’s lips. A sound escaped him before he could stop it. It was brutal, overwhelming, and intoxicating.
Harry realized, distantly, that this was his first kiss.
He felt starved, like someone finally seated in front of a banquet after years of hunger. His hands rose on instinct, gripping Voldemort’s shoulders and pulling him closer, deepening the kiss.
It isn’t real, he told himself.
No one will ever know.
Voldemort’s hand slid lower, from his waist to his crotch, and Harry leaned into the touch without thinking. It was dizzying. Unfamiliar. Delicious. He couldn’t help but moan in the other’s mouth.
Harry gripped Voldemort’s head, with the ferocity of a beast and it made them stumble to the floor. Harry could feel the other’s pressure on his body, it was entrancing and captivating. It was everything. Harry was getting hot by the second and started to take his tie off and unbutton his shirt.
“Eager, are we?” Harry didn’t miss the devilish smirk on the snake’s face.
“Shut up.” Harry closed the space between them, joining their mouths together. Voldemort moved aside. When Harry tried to chase his mouth once again, he was denied. “What?”
“Undress for me. I want to see all of you.” Harry felt the heat rising to his cheeks and wondered if this was a good idea.The expectant gaze of Voldemort made him decide. He might as well commit to the bit and forget this ever happened. That seemed like a good plan.
Harry wasted no time taking all of his clothes off —ready for Voldemort to take him in whatever form he wished to. He felt himself hardening by the second.
“You are beautiful,” Voldemort said before pressing their bodies together. Harry tried his best to suppress the fluttering in his stomach at hearing those words, and kissed the monster back.
Voldemort’s hands weren’t cold anymore. Every place he touched felt hot and inviting. Harry opened his legs, giving Voldemort more room to do whatever he wished. He could feel the slimy tail between pressing down his dick and couldn’t help but moan at the slippery sensation. He started moving his hips towards the pressure, his dick already leaking.
“Not so fast.” Voldemort pulled back just enough that the sudden absence made Harry feel lightheaded, like the air had been torn from his lungs. Before he could gather himself, Voldemort took his hand and guided it lower—far lower. Until he felt his own finger hovering the rim of his ass.
Harry froze.
He couldn’t possibly mean—
But Harry didn’t see any sign of retreat in his movements. He pulled his hand away. “I can’t! I’ve never—”
Voldemort grabbed his hand and placed it back in his lower area. “Don’t worry, darling. I’ll guide you. Every step of the way.”
“Grab your wand,” he whispered in Harry's ear. He didn’t think too much about it as he repeated the spell Voldemort whispered to him. The effect was immediate —heat, slickness, a disorienting awareness of his own body that made him gasp despite himself.
He distantly wondered if he ever learned it in one of their classes, or if he had unconsciously picked it up from a book to recite it from memory through Voldemort's fantasy. But the next words muttered to the room completely obliterated any capability of logical thinking: “Good boy.”
Yeah, Harry was definitely finding out things about himself he much rather would’ve stayed hidden for as long as possible. He decided he would feel the depth of his embarrassment tomorrow morning.
He decided to oblige to Voldemort’s request and started with one finger. Then two. And three. Harry tried his best not to moan while fucking himself in front of Voldemort’s unwavering gaze. Once the Dark Lord decided it was enough, he pulled his hand away.
Harry saw a bulge starting to form in the place where Voldemort’s crotch should be, and slick coming out of a thin slit in the area. He didn’t have time to wonder what was happening when a long, hard dick came out from the spot. And then another. Two of them. He gulped. Maybe someone should study whatever was wrong with Harry’s mind.
But when Voldemort pressed his hands on Harry’s thighs once again it didn’t feel right, it was like a phantom touch more than anything. The effect of the potion was dissolving. It looked like Voldemort’s image realized the same thing.
“It seems like we are finished for tonight, love.” Harry recoiled at the thought of finishing the night without being properly fucked by the monster in front of him. Without thinking he lunged for one of the discarded vials on the floor and chugged it down in one go.
Voldemort’s smirk didn’t make him blush this time. “Keep going.” Harry hoped his voice sounded steady.
He should probably worry about the side effects of drinking two doses of the potion so close together. He’d ask the twins about it tomorrow as well. It should all be fine.
Harry’s heart started to race in anticipation as Voldemort took both of his dicks in hand and pumped them to life. Seeing the Dark Lord in such an obscene way shouldn't have been as hot as it was. Harry was pretty sure no one else would agree with him. He was fine with that. Once the large lengths were leaking Voldemort aligned one of them with Harry’s entrance and pushed. Harry felt his soul leave his body. His insides were stretching completely and it wasn’t even all the way in.
“It’s too big. I can’t--”
Voldemort licked the tears off of Harry’s cheeks --he didn’t notice when he started crying.
“You will take what I’m willing to give you, and you’ll be thankful.” Voldemort murmured before thrusting his entire length into Harry. He gasped in surprise and pain. But he was too out of it to oppose anything. Once the sensations became much duller Voldemort started to move, slowly. Harry’s whimpers sounded pathetic to his own ear, but he couldn’t care less about humiliating himself in front of an illusion. It also seemed like Voldemort enjoyed the sounds coming from Harry’s mouth, thrusting a little harder to hear them again and again.
The monster’s hands were all over him, studying his whole body with every touch, while his forked tongue moved from his neck to his nipples. His mouth seemed to move on instinct, leaving teeth marks in his neck and chest. His wrists were already red from the strain of having them pinned behind his head. Voldemort’s second dick applied pressure to his own, all the sensations combined driving him to the edge of pleasure.
It was rough and arousing. Harry couldn’t stop himself from moaning the Dark Lord’s name —his human name, just to piss him off. And if hearing “Tom” made Voldemort thrust into him with more brutal force, then that was simply a consequence Harry had no way of predicting. A happy coincidence, in any case.
It was all too much, Harry was going to come in any second --or so he thought.
“Now, darling. Not so fast there.” A clawed hand closed around his cock, one of the monster’s nails covering the tip to prevent him from releasing. “You should always ask for permission first.”
Harry could murder him.
“Please. Let me--” His plea was lost to the moans that followed. “Fuck. I need you.”
Voldemort had the audacity to chuckle. “Anything for you, love.” Still, he removed his hand and kissed Harry’s scar. Somehow, that was what made him go over the edge. He felt himself cum harder than he ever had before. His entire body was left trembling. Of course, Voldemort fucked him through his orgasm.
Before he could catch his breath, he felt Voldemort’s hips faltering. His cum landed on his chest, both seeds mingling together. While a warm liquid filled him from behind.
“You’re so full of me darling, think it will take?” Harry let out a soft laugh at the ridiculous assumption.
Voldemort was still inside of him, shoulders slumped and head buried in Harry’s neck. It shouldn’t have felt as heartwarming as it did. Harry looked down at their bodies tangled together, completely entranced by the sight.
It was only a few seconds before Voldemort raised his head again. His red eyes were burning like fire. Harry found them endearing all the same.
“I hope you’re not tired yet, darling.” Voldemort didn’t waste another second. He moved towards another vial discarded on the floor. He grabbed it, tilted Harry’s head back and made him swallow on instinct.
Harry gasped as every sensation on his body felt sharpened. But something wasn’t right.
“Should you be able to do that?” He asked aloud, but his thoughts were becoming fuzzy with arousal once again.
“Do what, love?”
“Just— grab actual, real things. The vial—” Harry’s rambling cut off as Voldemort kissed him, and despite himself, he leaned into the touch.
“Don’t worry about meaningless things right now. This is your Christmas gift.”
Harry melted at the words and decided he would enjoy every second of the fantasy and deal with the consequences once the potion wore off. And if that meant being fucked by serpent Voldemort all night, then so be it. It’s not like it was real, anyway.
He was pretty sure the nausea and weird cravings that started after Christmas break were completely unrelated, as well.
They persisted anyway.