Chose an unlikely pairing or make your own story with two people hating each other so much that the tension gets sexual and you know the rest
One sex scene minimum and at least 2 fights ending in some form of minor or major smut (groping, kissing, anything sexy)

Special Thanks to Lun27 for betaing.

Hate-Sex-Challenge

Harry, Ron, and Hermione entered the Hogwarts Express.

"Where do you want to sit?" Harry asked his friends.

They exchanged a quick glance.

"Sorry, Harry..." Hermione said biting her lip. Her gaze wandered to the front of the train where the prefects were meeting.

Harry nodded, trying to not look disappointed. He would have to sit by himself, at least, for a while.

Hugging each other they were rudely interrupted by none other than Malfoy. He shoved Harry to the side. His pale hand reached into his messy black hair and he pressed Harry's head against his chest.

"This is the way to the prefects' car, you see, Potter? You have no business going there."

Harry pushed the Slytherin away. Their eyes met. He was able to see his silver orbs in all their beauty. "Get lost Malfoy."

Draco leaned forward. Harry felt his hot breath against his sensitive neck. Shivers went through his spine. His lips parted slightly and his brain was fuzzy. Suddenly, he felt Malfoy's hand on his crotch.

How did he always manage to find a new way to mess with him. Shouldn't he focus on his studies? Harry giggled thinking about the discussion Malfoy had with his father years ago in Knockturn Alley. A smile crept up his face. But as soon as it appeared he felt his grip around him tighten and flinched

His mouth went dry and he swallowed hard. Instincts took over and he pushed his hips into Malfoy's hand desperate for more friction.

He had never felt quite like that before. Not knowing what to do and hating that it was Malfoy of all people who made him feel that way, he slapped him.

Draco touched his red cheek and smirked at the sight of his strained trousers before leaving.

Harry's jeans felt too tight. Being confronted with his own erection, he needed to find a way to hide it before someone could see it.

Too late. Hermione was staring at his crotch. Harry was sure that his face had taken on a shade of crimson red.

"We still have eleven minutes until the train leaves," Hermione said, "Watch Croonkshanks and my stuff."

She ran out of the train leaving two very confused wizards behind. They watched her run along the platform until she vanished out of view, wondering what she was up to. Harry looked at Ron who simply shrugged. "You know how she is."

At this moment Harry didn't even know why he reacted to Draco the way he did. Sure he had a pretty face and a nice arse, but they hated each other. It was probably just puberty; he could jump at everything.

Hermione returned a few minutes later completely out of breath.

"For you," she said, handing Harry a shopping bag, "I didn't know your size so I bought a variety. I'm sure you're not the only one in need so you can pass those who don't fit simply on."

"What is that?" Ron asked, unpacking a condom and blowing it up like a balloon.

Hermione looked at him with a raised brow. "A condom, muggle put them over their… thing before sex for protection."

"Huh? Draco can't get Harry pregnant," Ron said.

"Pregnancy is the least of his concerns. There are tons of diseases he could get. Probably the only virus that has never been found in sperm-samples is the common flu. And even if you 'only' contract something bacterial it would be still hard to treat due to resistances and some bacteria like chlamydia live and prosper within cells which makes delivering medicine hard, in the first place."

Ron and Harry were scratching themself furiously. The disgust was evident in their faces.

"Also, they're lubricated which should help make things go smoothly," Hermione added.

Ron covered his ears with his hands. "Too many details, too many details," he said repeatedly turning around his own axis. His shoulder brushed against the wall of the department with every turn.

Hermione sighed. "You're so immature."

The Hogwarts Express finally set into motion. Harry couldn't wait to get rid of his friends. Those must have been the most humiliating minutes in his life. He quickly hid the bag before someone could see it and looked for an empty department.

Harry tried his best to avoid Draco for the next couple of weeks. The mood between them had shifted. Yes, they still hated each other with passion but now there was something more; something dangerous.

He was having dreams; disturbing ones. Harry was glad that Voldemort was sharing his thoughts otherwise he would have to explain to his friends that Draco was robbing his sleep. He couldn't stop thinking about the blond's hand on his crotch and how much he had wanted him to grab his cock and have him come all over his uniform. How much he had liked to feel his warm breath on his sensitive skin, how much he had wanted to snog the git senseless and how much he had wanted to bend him over and fuck his perfect arse.

Harry felt his cheeks glow. Embarrassed by his own thoughts, he hid beneath the blanket.

He couldn't evade Draco forever. It was no surprise that the two of them would run into each other eventually.

Looking around the narrow corridor he had to realized that they were alone. They had to pass each other. Not wanting to look like a coward, Harry continued walking towards the other wizard. He slowed down as Draco got closer and closer.

They stopped in front of each other. Their eyes met. Rising to the challenge they stepped closer to each other. Being close enough to inhale each other's breath. Harry grabbed him by his tie and dragged him closer.

Malfoy pushed him against the stone wall. All their combined anger boiled to the surface. Harry's hand reached behind the blond wizard and he grabbed his butt. His nails dug into his flesh and it pleased him to hear Draco groan.

The Slytherin leaned forward and captured Harry's lower lip with his teeth. Their eyes met. Harry saw a glimmer of something in his icy blue eyes. He felt him smirk before biting on his delicate lip. Harry hissed through his closed teeth while Draco drew blood.

Still cupping Malfoy's butt cheek, he felt him against his belly being as hard as he was. He reached between them; he was curious about his snake. Wondering if he was bigger or about the same size as himself, he opened his trousers. Draco didn't seem to object.

An awfully loud clicking echoed thought the hallway. The frequency gave her away. Umbridge was coming their way.

In panic, he pushed Draco away and ran. From the corner of his eyes, he saw Draco close his trousers.

The blond cleared his throat. "No running in the corridors; five points off Gryffindor."

Harry returned to the common room. His lips covered by his hand, he found Hermione sitting in the corner doing her homework. He sat down next to her, asking if she could do something about his lip. Harry really didn't want anybody else to see it and spread rumors.

"Ouch, Harry. What did you do?"

"I, em, met Malfoy," he said.

Hermione looked worried and cast a healing charm.

"You do have condoms with you, don't you?"

Harry swallowed hard. "It's not like I plan on sleeping with the ferret or anything!"

"Oh, Harry! You may not be planning on doing it, but you are clearly heading this direction. Don't you want the knowledge of being able to let things happen guilt-free?"

"How can I sleep with Malfoy 'guilt-free'?" he snapped.

"By not being an idiot and using protection."

Suddenly he wished he had gone to Madam Pomfrey instead. Then at least he wouldn't have to hear her speech.

Hermione was right, of course. Things between him and Draco only got more heated.

It was the stress, Harry told himself. It wasn't like he was attracted to Malfoy or anything, it was the constant scrutiny of the ministry and the press, Umbridge and whatever Voldemort was planning. All of this extra weight on his shoulders was getting to him. It was only natural that he needed an outlet.

Harry put on his Quidditch robes. There was nothing he loved more than riding his broom. It was his preferred method of coping. Up in the air, he was able to clear his mind and to be truly at peace.

Walking down to the playing field, he saw form a far green dots flying on their brooms above his head. Anger rose in him. His hand formed a fist. They had reserved the pitch for that afternoon for their practice. How dare the Slytherins ruin his only fun. He demanded answers.

Rushing to the playing field, Draco landed with his broom right in front of him.

"You see, Professor Umbridge thought that well-behaved students who gain and don't lose house points should be prioritized when it comes to extracurricular activities."

Harry's hand formed a fist and his jaw twitched. He threw Draco to the ground.

The two of them continued to fight rolling downhill until they came to rest behind the commentary tower.

His hands clenched around his shoulder. Harry wanted to bite the Slytherin. Letting out a series of groans they were attempting to kick each other. They rolled on the ground each of them trying to be on the top. Tugging on each other's robes, their breathing increased.

Harry inhaled Draco's musky scent. Being close enough to feel each other's heartbeat they rolled down to the hill until they came to rest behind the commentary tower. His knee was dangerously close to his crotch.

Shielded from prying eyes, it wasn't long until he felt Draco's tongue invade his mouth. They fought for dominance until they needed to breathe. Gasping for air, they fumbled on each other's robes.

Undressing in a haste, he finally got to see Draco's bare chest. His pale skin looked like alabaster. Scratching over his perfect skin, Harry left red marks on him.

They were in a rush. Harry sighed once his cock was finally freed from its tight prison. Draco wrapped his hand around it and started to pump.

Moaning quietly, Harry enjoyed the sensation his warm hands provided. He hexed Draco's boxershorts into oblivion. Finally being able to see the pride of Slytherin up close, he took a deep breath. Returning the favor, Harry took a moment to study him. He looked a little different from himself; longer but not quite as thick. He found it fascinating.

"Turn around," Draco hissed.

"Can't I top?"

"Next time," the blond said half-heartedly.

"Wait! Protection."

Draco scammed through the pile of clothes in search for his wand. Once he had finally found it, he cast a quick notice-me-not charm.

"I, em, was thinking more along the lines of condoms," Harry said blushing.

The Slytherin looked confused. Being in a hurry, Harry opened the package and rolled it over Draco's shaft.

"Believe me. If you were to contract a muggle-disease your father will hear about it."

Draco stared at him through narrowed eyes. "If you tell him, I'll kill you."

He cast a few charms Harry didn't recognize before dipping two of his fingers into his hole.

"Clean and wet just like I need you."

"You're not doing this for the first time?" Harry asked.

"Father taught me everything I needed to know," Draco said before pushing into him.

Harry hissed as he felt him enter his well-lubricated butt.

"Relax and don't move," Draco said before picking up the pace.

Thrusting into the wizard his hand reached around Harry and he grabbed his cock. Stroking up and down. They both grunted. Slapping sounds reminiscent of a cup of yogurt being turned were audible.

Soon Draco's movements became sloppy. Moaning loudly, he came.

Completely spent, he crashed onto Harry whose arms couldn't keep him off the ground for any longer and gave in.

Draco wiped his sperm covered hand onto Harry who in return pushed the Slytherin off him. They lied there next to each other panting. Slowly regaining their strength, Draco vanished the mess they'd made.

Harry looked up. There was a grey-striped cat staring at them. They immediately covered themselves. The two boys' faces turned into a shade of crimson red and the cat kept looking at them.

Professor McGonagall turned back into her human form. Looking at the two wizards with a raised brow, she said, "10 points to each of you for practicing safer-sex."

"How much have you seen?" Harry asked, his face was as white as a sheet of paper.

"Enough."

Being alone again, they threw on their robes over and walked to the showers. This was so humiliating. Hopefully, they wouldn't be caught the next time.

Before dinner, Umbridge got hold of Professor McGonagall.

"It has come to my attention that you have given house points to both Gryffindor and Slytherin."

"You are selling your students under value. There are many bright, hardworking and ambitious students in Slytherin," Professor McGonagall replied.

"Yes, but you see, I have never heard about anybody giving those two houses points in the same sentence."

"It's rare," McGonagall said dryly.

"And for what exactly have you given those points?" Umbridge asked in her most pleasant voice.

"For practicing safer-sex," she said watching the slick smile on her ugly face fall.

"You have to tell me the names of the students in question. Boys and girls have to keep a distance of eight inches. They need to be punished, separately."

"And what makes you think that sex requires the presence of a girl and a boy?" Professor McGonagall said, leaving a disturbed and enraged looking Umbridge behind.