Night had fallen on Hogwarts castle, the castle halls quiet save for the crackling of the torches lining them. Yet deep inside its dungeons, some of the student had not yet retired for the night like the rest of their peers had. Hermione Granger, Damon Pierce, and Marcie Flynn sat around a bubbling cauldron, as Hermione frantically shouted out orders.

"Oh bother, we should have added the witherwort wing when the potion first started turning blue and its already almost purple. Why didn't you tell me that Marcie?" Hermione said, darting across the room to grab the ingredient.

"I dunno, guess I thought you'd do it," Marcie said with a yawn, half asleep in her chair.

"I can't believe the Professor paired me with you, your not even taking this serious," Hermione said with a huff.

"I can't believe you kept us working until 3 am," Marcie grumbled.

"This is a quarter of out grade, we have to take this seriously," Hermione cried.

"Guys, try to keep it civil," said Alec as he kept stiring the potion, "We're almost done anyway, lets just get this done already."

'We would be done if Marcie didn't screw up her only job," Hermione said in a huff, " Now we're going to have to mix the potion another hour at least."

"Listen, Hermione why don't you go to bed, Marcie and I will finish mixing the potion, in exchange you can come and check on it in the morning and add the final ingredients," Alec suggested.

Hermione paused for a moment. She didn't exactly trust these fools to finish the potion, but her eyes had been growing heavier by the minute and she thought longingly of her bed in the tower. Against her better judgement, Hermione nodded her head and began to shove her belongings into her bag.

"Please don't mess this up," she said, before slinging her bag over her shoulder and making her way up the stone steps and out of the dungeon.

"Good riddance," Marcie said a yawn, lying her head down for a nap, her book bag serving as a pillow.

"What do you think you're doing?" Alec asked, "Its your fault I'm still down here, and my arms are getting tired anyway so I need you to come stir this."

"But your so strong," Marcie said with a smirk, "And *yawn* so good at stirring"

"Take the damn paddle."

"Ugh, fine, I'll help you," Marcie groaned, "but I'm not stirring that gross mess."

Marcie walked across the dungeon to the potion stores and began rummaging around inside them, taking an assortment of bottles and containers out and placing them at her feet. Grabbing her mess of ingredients in her arms, Marcie walked back to the center of the room and placed them on the table beside the cauldron. She began to take various ingredients out and lay them on the table.

"What are you doing?" Alec asked.

"Fixing my mistake so we can go to bed."

"Do you know what you're doing?"

"Just because I'm not Hermione Granger doesn't mean I'm not smart."

With that Marcie, in one single arm motion, brushed the ingredients into the cauldron. The cauldron immediately began to fizz, droplets of the potion jumping up like the potion was boiling. The color switched from the dark blue to a brilliant red and steam began rising from the cauldron in great puffs.

"Did you mean to do that?" Alec asked nervously eyeing the potion, which seemed to be boiling now to the point of making the cauldron violently vibrate across the floor.

"Of course I did," Marcie said, leaning over the cauldron's brim, "Everything is perfectly under con...."

The potion promptly exploded, the viscous red liquid propelled straight up by the **** of the blast in Marcie's face. Marcie stumbled backwards, falling to the floor, her curly blond hair drenched in the potion.

"Are you okay," Alec shouted, rushing over to Marcie.

He looked her over, luckily it seemed that the potion had only appeared to be boiling and had not actually inflicted any burn wounds on the girl. In fact, it seemed to have had no negative effects on Marcie beyond drenching her in whatever mixture this potion had ended up being. She seemed dazed from the explosion, her eyes glassy and expression lax.

"Marcie, Marcie, do you need to go to the hospital w....."

Marcie suddenly shot up, pressing her lips against Alec's. Alec was shocked at Marcie's sudden advance, her cold lips pressed firmly against his. Her tongue **** its way into his mouth, her saliva mixing with his. Alec felt his inhibitions begin to drift away, as he began kissing Marcie back.

Marcie reached a hand down and began to pull down Alec's pants, exposing his boner. Marcie Pushed Alec onto his back, breaking their kiss. Taking off her own clothes, Marcie lowered herself down on Alec, penetrating deep inside of her. She let out a loud moan as she began to move up and down on Alec's cock. Alec felt increasingly amazing, the sensation of Marcie's pussy was tighter and softer than any he had felt before. It felt like she was milking him with how much suction was being put on his cock. Alec by now had given up resisting the fog that had been spreading through his mind, he willingly bucking his hips in time with Marcie's motions. Marcie's tongue hung out of her mouth, saliva dripping down her chin in streaks that stained her shirt. She began to grope herself through her shirt, fully corrupted by the virus.

The two bucked into one another as the drove each other closer to their orgasms and deeper into lustful insanity. Eventually, the sucking sensation became too much for Alec to bear, thrusting one final time into Marcie and releasing a mind shattering orgasm that filled Marcie up to the brim, spilling out onto the floor. At the same time, Marcie orgasmed as well, her eyes rolling into the back of her head as she moaned out her orgasm.

Marcie rolled off of Alec, panting from the sensation. Her skin had gone pale, and her mind had been fully corrupted by the potion's effects and now all she could think about was having sex. The same had happened to Alec, whose penis remained erect and ready to have sex with the next unlucky girl. The two staggered up, both pale skinned and zombified, the two started to make their way out of the dungeons to find whoever they could to fuck next.

It was the dawn of a new apocalypse... of lust.

_______________________________________

The Next Morning.

Hermione rolled out of bed not feeling much better than she had the night before. She got dressed and stumbled her way out of the tower and down into the common room. When she got there, however, she found the normally energetic room tense and quiet. Hermione noticed Ginny and Luna huddled together in the corner of the room, whispering back and forth rapidly.

"Is something going on?" Hermione asked as she walked up to them, "Where is everyone?"

"We don't know," Ginny said, a worried look on her face, "Luna and I were about to go down to breakfast when all the sudden Percy herded everyone nearby back into the common room and told us not to leave. He even **** people not in our house in. Nobody else has come through the portrait since he left, I don't know where Harry and Ron are."

Hermione looked around and noticed that indeed both Griffindors and a number of students from the other houses were sitting around the common room. Among them, the brunette chaser, Katie Bell, the black haired ravenclaw, Cho Chang, and, much to Hermione's disgust, the goth sytherin, Bella Lestrange. Bella had been a constant enemy of Hermione's, bullying her and doing whatever she could to make her life more difficult.

"Who let Bella in," Hermione grumbled.

"Trust me, nobody's happy about it," Ginny replied.

"She's only mean because her star sign is out of focus so often," Luna added, "It causes evil spirits to latch onto you because the star gods aren't protecting you."

"I think she's just a bitch," Ginny said shaking her head.

It was at this moment, when Percy suddenly reappeared through the portrait hole, looking quite pale and overall rattled.

"Can we leave now?" Ginny asked, "Luna and I have things we need to do."

"I'm sorry but no," Percy replied

"But.."

Percy gave Ginny a glare so cold that it instantly froze the rest of her argument on her tongue.

"Listen up you lot, there has been a sudden outbreak of a magical virus that is currently spreading through the school. Effective immediately, the castle has been put under lock down and common rooms have been delegated as safe zones for students to remain while the staff deals with the problem. No student is permitted to leave the common room they are currently in, and I will remain her to ensure that you do not leave. Now are there any questions?"

"What do you mean a magical virus?" shouted Cho, "What does that even mean?"

"Its a virus that doesn't originate from a biological source, but instead is caused by a magical source inflicting an aliment on the body," Hermione said.

"What is in doing to people, is it hurting them?" Katie asked her face white.

"Well... umm... not necessarily, you see... it... um... how do it put this...... it seems to cause increased...... umm.... sexual drive in people who have contracted it," Percy said, his pace going pink.

The common room went silent, faces showing a mix of disgust, disbelief, and confusion. The silence hung in the air for what seemed like an eternity, until finally a harsh laugh sounded from the window.

"It causes people to have sex," Bella laughed, "you can't be serious."

"Well from what it seems, the spell seems to target the victims brain and cause them to enter a state of mindless desire where they'll attack anyone they see and try to have sex with them. The spell is then transmitted through.... uh... bodily fluids, during the encounter, transmitting the spell to the other person as a result." Percy said.

"Eww...," said Ginny scrunching her nose.

"That can't be right," said Katie, "What kind of horrible person would create a spell like that?"

"Maybe wizard didn't,' Luna chimed in "The upper monty river snake is said to have aphrodisiac powers, maybe someone got bit by one."

"From what I've been told," Percy said, "the teachers believe the contagion originated from inside the castle, possibly from some ancient artifact or spell that had gone unnoticed until today. Its entirely possible that some student just happened to come across some kind of dark magic and unwillingly unleashed it."

"You make it sound like this is strong magic, how much danger are we in?" asked Hermione.

"Let me assure you that the teachers are handling it, this is Hogwarts after all, we have some of the best witches and wizards in the country, I guarantee that this will be resolved within the hour and we can have a good laugh about it. Now if you'll excuse me I'm going to go try and contact the other prefects."

With that Percy hurried off to talk to some of the tower portraits, everyone else converging into small groups to talk about the news.

"This is just awful," Katie said, "I hope everyone else is okay."

This caused Hermione to grimace thinking about Harry and Ron and where they might be. She looked over and saw Ginny barely holding back tears, probably thinking about the same thing.

"I'm sure Ron and harry are okay," Hermione said, placing a reassuring hand on Ginny's shoulder, "I bet they're just cooped up in another common room."

"We could find out," said Cho, eyeing the corridor Percy had went down, "Come on."

Cho led Ginny, Luna, Katie, and Hermione across the common room to the edge of the corridor, where they could clearly see Percy in tense conversation with one of the portraits.

"I don't see why you can't do this for me, I need you to serve a messenger between the common rooms and the teachers, the students are already scared half to ****, I need good news to tell them." Percy said

"I won't do it," the portrait, a knight with a big bushy mustache, roared, "I have seen first hand the depravity going on out there. You prefects think you can boss me around, the last time I was out there I barely escaped to this portrait with my life. You are a damned fool if you think I will listen to you!!!"

"I understand that but Hogwarts needs you to do this service for your school, and......" Percy stopped talking mid sentence as something the knight had said struck him, "Wait what do you mean they almost got you? You're a portrait."

"It was unlike anything I've ever laid eyes on my boy, I was watching the scene unfold when suddenly that dastardly hag Ophelia appeared in the portrait of Sir Geoffery. She was in a trance the same as the students, her skin gray and her eyes blank and unseeing. She attacked Geoffery and just like the students he too soon fell to the depravity spreading through our school. They are coming for me the same as you, I must stay here hidden as long as I can, lest I meet a horrific end."

"If the magic is infecting portraits as well, dear god..." Percy said, his face turning pale as the realization dawned on him.

Percy turned and ran from the portrait, shoving past the girls who didn't even try to pretend they weren't snooping, into the main common room area.

"What's he so worried about?" Ginny asked rolling her eyes.

"Well, if portraits are being infected by the spell," said Hermione, "Then there's a chance that the fat lady could get infected and then...."

*CRASH*

The portrait hole swung open with more **** than any Gryffindor had ever seen it do, and through the now open hole streamed at least 25 gray and green skinned zombies. The fat lady moaned from her portrait her hand outstretched as she sent her undead brothers and sisters on the students. Before anyone could react, the infected were upon them, cold hands wrapping around their bodies. The students screamed and ran, looking desperately for some way to escape, but there was none and one by one they were forcible pinned down and fucked.

"We need to get out of here," screamed Ginny, barely avoiding the outstretched hands of the undead.

"We have to go out the portrait," said Hermione, firing stunning spells every which way, "The towers been overrun."

Hermione led the way across the common room, stunning zombie after zombie as they tried to chase her down. Just as she was taking down a green skinned hufflepuff girl, Hermione suddenly felt two hands grasp her chest. Seamus moaned as her groped Hermione, his erect member rubbing against her ass. Seamus's cold touch made Hermione jump, her wand slipping through her sweaty fingers. Hermione cursed herself as her wand clattered uselessly against the ground, struggling to break from the zombie's grip. As Hermione stood helpless, she began to feel aroused as Seamus continued to grind against her. Almost instinctively, Hermione grinded back into Seamus's cock, feeling some of the semen coating his cock soak through her clothes. Her mind flashed with scenes of Seamus's penis penetrating her, stretching her insides to fit around him. "What am I doing?" Hermione thought, her body starting to go limp in Seamus's arms. She continued to push back into Seamus's cock, her body becoming more and more aroused as Seamus massaged her tender breasts. Hermione felt her arousal grow and her pussy begin to dampen. "Fuck," Hermione moaned into the zombies ear, fully enthralled in the humping, "give me more."

*CRASH*

Without any hesitation, Bella smashed a wooden chair over Seamus's head. Seamus's knees buckled and he crumpled to the floor, Hermione sliding out of his arms to the ground.

"Come on, come on," Bella said, pulling on Hermione's collar, "Everyone else is waiting for you and you're being a pain in the ass."

Hermione shook her head, still dazed. She allowed Bella to drag her to feet, shoving her wand in her hand as she went, and guide her through the chaos in the common room, stunning zombies as they went. As Bella ushered Hermione through the common room, Hermione's eyes surveyed the obscenity that had invaded the tower. Everywhere she looked, she saw friends and acquaintances mindlessly fucking, sucking, and rubbing. Just as she was stepping over the portrait frame, Hermione noticed a red head zombie moaning in ecstasy as a brown haired zombie sucked his cock. Hermione gave one more look at Percy's lifeless face as Bella **** the portrait door shut. The fat lady moaned at them from her portrait, mindlessly trying to grab them unaware they occupied two different worlds. Up ahead, Ginny, Katie, Luna, and Cho all stood huddled together, their wands drawn at the shadows around them.

"What happened to you!" Ginny shouted as Hermione and Bella approached, her face streaked with tears.

"I...I don't want to talked about it, " Hermione mumbled, still feeling weak in the legs, Bella's supportive arm still wrapped around her back.

Ginny wanted to press the issue further, however a murderous look from Bella silenced any further questions.

"Do any of you idiots have a plan?" Bella asked, "Cause I would prefer not to be a sex toy for some random boy."

"We should leave the castle," said Cho, "Use one of the hidden passageways to get to Hogsmead or the train station or really anywhere that isn't here."

"All the passageways are on the bottom floors of the castle though," said Luna, "And I expect we would run into more of those zombies, and we had an awful lot of trouble the first time."

"The room of requirement," Hermione spat out, struggling to translate her thought into words, "It's hidden, and that alone probably could fool the zombies, but as a bonus you can only get into it if you know what the people inside are using it as. Its the perfect hide out for now."

"Works for me," Bella said, adjusting her grip on Hermione "lead the way rodent."

The group crept through the halls of Hogwarts castle, carefully avoiding the zombies they encountered. Thankfully, it seemed the virus dulled the zombies' observational skills, making it easy to move around them. Before long, our heroes had traveled to the blank wall that only a select few knew contained the room of requirement.

"Here we are," Cho whispered, running her hands over the cold stone.

"Great, now will one of you losers open the damn door" Bella asked, nervously scanning their surroundings.

"I'm working on it," Cho said annoyed, this time pushing her palms against the wall.

"You're not doing it right," Ginny hissed, "Watch and learn." Ginny placed a hand on the wall, and the group waited for something to happen.

"What are you useless mudbloods doing?" Bella cursed, "Don't you do this all the time?"

"I don't know whats wrong," Ginny said flustered, "Normally all you have to do is touch the wall for it to open."

"It must not like you," Luna said calmly, "Which means it must already like someone."

"What's that supposed to mean?" Cho hissed.

"What Luna's trying to say is that someone must already be using the room," said Hermione, "that's why we can't get in, because we don't know what its supposed to be."

"What do we do then?" Ginny asked.

"Well we.. uh.. I mean obviously we should..." hermione said, clearly at a loss for what to say next.

"Uh guys," Katie chimed in, her eyes focused on something at the far end of the hall.

Shambling up the stair case was a pack of zombies at least 40 strong, all displaying various levels of nudity. With each step breasts bounced and cocks trembled, oozing liquid over themselves and their surrondings.

"We should go," whispered Ginny to the agreement of everyone else.

However as they turned to leave, to their horror, another group of zombies appeared effectively cutting off their means of escape.

"What do we do?" Cho asked, trembling.

"Maybe they're blind, like a cottle bat," Luna whispered.

The group stood in silence as the horde shambled closer from both sides. As they approached, the zombie's lifeless faces began contorting into an expression something like confusion. Their milky, white eyes dialated as they tried to focus on what was in front of them. Then one of them let out a blood curdling moan, and the horde attacked.

"What do we do?" Cho screamed.

"Move," Bella commanded, shoving Cho away from the wall, "Open the damn door, we are about to get fucked out here."

"Please," Ginny cried, "We aren't zombies, I swear, just let us in."

The zombies were closing in from all sides, a frenzy of green, gray, and purple, falling over themselves as they tried to get to the humans. Bella continued banging on the door, yelling every curse word she knew, but no response came from inside. Ginny and Hermione shared a look, accepting their fate. However, just as the horde closed in, the wall behind them rumbled, and a door materialized in the cold stone.

"Come on!" Bella yelled, pulling the door open.

The group made it inside just before the cold hands of the horde was able to close around them. Everyone was taking a moment to catch their breath, when Ginny made a shrill sound.

" Harry!", she screamed before wrapping her arms around him.

Hermione and Luna weren't far behind her, the four of them soon wrapped up in a group hug.

"What are you doing here Harry?" Hermione asked.

"It's a long story," said Harry, as the group settled in around him for story time, "I was with Ron down on the first floor by the transfiguration classrooms, when all of the sudden these crazy naked people ran out of the dungeons and at us. One almost got me before I managed to get my wand out and stun them. Ron.. he wasn't so lucky..." Ginny let out a small whimper, causing Luna to put her arm around her friend. "There wasn't anything I could do for Ron, there was just.... so many of them, so I starting running looking for somewhere to go. I ended up just running into more chaos and crazy naked people until I had a pack of them chasing me. They were gaining on me, but then I remembered that the room of requirement was nearby. I managed to get to the wall and wished for somewhere safe I could hide. So that's how I ended up here."

With that Harry gestured to the room behind him. The room had turned into some kind of safe haven, its floors and walls made from oak wood. Comfy looking chairs and sofas were arranged leading up to some sort of giant tree like structure located on the far wall. A ladder led up into the trees trunk and lanterns hung from the tree's branches illumnating the room.

"There are a bunch of alcoves with blankets in the tree, so its not too bad a hiding place. Shame it can't generate any food though," Harry said.

"Its great," said Hermione, " I think we could all use some rest after the day we've had. We'll figure out a plan in the morning."

Hermione led the others up into the tree.

"it looks like there's four alcoves," Hermione said, "Looks like we're going to split into groups."

"I want to talk to Harry, alone," Ginny said, grabbing harry and leading him away without another word.

"Well I.. guess that will work... I guess then me and Luna and katie and Cho, does that work? Oh and Bella you can sleep by yourself"

"Thank god I don't have to share a room with one of you muggle lovers," Bella scoffed, before disappearing as well.

With that the other tow split into their groups and went into their alcoves.

Katie and Cho curled up in a pile of blankets, wrapped tightly around them to protect them from the world.

"Hey, Katie," Cho asked, "Can I ask you something?"

"Yeah, what?" Katie asked fidgeting slightly under her blankets.

"When you saw them, the zombies, did you ever wonder what it would feel like to be one?"

Katie giggled. "You that horny Cho? If so I'm sure some zombie would be more than happy to fuck you senseless."

"No I.. that's not what I meant," Cho said, her face going red, "Its just like, I feel

Ginny sat curled up next to Harry. Silent tears were running down her face, as Harry held her gently.

"They got Ron and I watched them get Percy, and I did nothing. I let them turn him into one of them."

"Its not your fault