Hermione had brewed a few potions for Neville's experiments and decided to bring them over in the morning, so he had the day to work with them; she made the journey out to his greenhouse and used the key she had to open let herself in knowing as it was early he might still be in bed. She laid the potions a free bench and wrote him a note to explain the labels, so she didn't accidentally ruin one of his projects. Just as she was about to leave for charms she heard the door to Neville's room open and turned to great him and was surprised to see Luna walking out in a large shirt and Hermione guessed nothing else. Luna smirked and walked over to great her.
"Didn't think I would bump into you this morning Hermione but I suppose this is proof that I have done my part of the deal," Luna said, still smirking.
"Yeah well mine was much harder and I managed to get that done so I would be a little disappointed if you had given up just because it's Neville," Hermione returned.
"Oh, easy you think?" Luna asked, annoyed at Hermione's attitude. "Fine give me one that you think is hard and I will show you it doesn't matter what you throw my way."
Hermione thought for a minute, she wanted it to be someone that would make Luna regret this stupid challenge, but first she remembered the contract she had written up.
"Okay, I'll give the name in a minute but first I made a contract, I realised we have been just accepting an honesty policy, but I figured if we have a contract we don't have to worry about the other cheating." Hermione handed her the contract. "Pretty simple, it is a game contract. Same terms we agreed to and if we don't follow these rules then out name will go red and the other will be declared the winner, same goes if they are unable to do the task."
Luna read it over and smiled, this way she would have a document to wave in Hermione's face when she won. She signed and handed it back to Hermione who signed as well. Their names glowed bright for a second, so it was official.

"Okay then Hermione, who is the name you think that I will struggle so much with?" Luna asked confidently.
"Vincent Crabbe."
Luna glared at Hermione. She knew that Crabbe hated them. His family was torn apart at the end of the great war, his parents imprisoned, and it had seemed he was going down that same path had it not been for Dumbledore asking him to be pardoned on the terms that he does well in his last year and stays out of trouble. With Draco trying to stay on a better path and Goyle choosing to face prison rather than betray his family he also lost a friend. Many of the Slytherin students kept their distance not wanting to be seen with someone who almost went to prison or feeling he did betray his family and though changes were being made family loyalty still ran deep within the house. This combination had made him a bitter bully, and unfortunately, as did others, he found it easy to laugh at Luna in the corridors to make himself feel better. Though she didn't let it impact her too deeply that didn't change the fact that she still didn't like him.
"No. Take it back Granger or you'll regret it," Luna growled.
"Nope. You know the rules. I said the name. You have to, or you lose." Hermione enjoyed that it the name had gotten under her skin.
"Fine. I can play that game too," Luna tried to think of someone worse than Crabbe and smiled when the name came to her mind. "Severus Snape."

Hermione burned red and was furious, "Luna that's not funny. He's a professor. He doesn't count."
"Does the contract agree with that?" Luna grinned?
Hermione looked at it but knew that Luna was correct, she had not mentioned anything about Professors being off limits and the names were both still black, so no rules had been broken.
She glared at Luna and said nothing. Hopefully Luna would tap out first and then she would be win by default. But Luna was still grinning.
"Another brilliant point I have just remembered? Today is the last day of class. Term break. We are leaving for The Burrow tomorrow morning. You have today to fuck Snape." Luna laughed sure that this was now her competition. No way Hermione would agree to this.
Hermione was too mad for words, she left without saying anything and luckily for Luna she left the contract there, as soon as Hermione's name went red she would be the winner. She smiled watching Hermione storm off, confident she would be the winner soon.

Hermione on the other hand was fuming all day, she could barely focus through her classes and couldn't believe Luna would do this and couldn't believe that she didn't add that to the contract, maybe Luna should have been a Slytherin with this move. By the time she got to potions, her last class of the day, she was a nervous wreck. Was she really going to try this for a competition? Then as the lesson started she had an idea, she would take a love potion and then try seducing Snape, the love potion sorted her feelings and the seduction would have to happen either way. Luckily, she knew Snape had a bottle of Amortentia, she would only need a couple drops, she was looking for a very short-term dose. As he talked to them about the many uses of Unicorn Hair in potion brewing she looked around for distractions; but luckily for her there was the sound of an large boom in the back of the classroom, she glanced briefly to make sure no one was hurt and when she saw a shocked but unharmed Ron gripping one of his brothers joke products and as everyone was looking and Snape walked over to punish them she ran to his back cupboard and looked through his private stores. She knew it was here, he had at least a display copy that he pulled out when teaching on it. She was looking for so long she didn't hear the footprints coming towards her and by the time she heard the door open it was too late, Snape was at the door looking at her.

They made eye contact and she didn't know what to say, he turned around and she heard him dismissing the class. He walked back into the room and she her palms were sweating with fear.
"Granger, what do you think you are doing back here?"
His nostrils were flaring, and she knew she was in trouble. Before she could respond he reached behind her and grabbed a small vial. She recognised the name on the label straight away, Veritaserum – truth serum.
"Before you try lie to me, I don't believe whatever comes out of your mouth. Gryffindor loyalty means you will lie to my face." Snape summoned a glass of water and added a drop. "So, you can either drink this and tell me what you, Potter and Weasley are doing or we can go to the headmaster and let him tell you the price for stealing potions from my private store."
Hermione knew the price, expulsion. If she drunk the potion and he realised that she wasn't up to anything she at least had a chance him letting her go. So, she took the potion from his outstretched hand and drank it all.

"So, what are you and your conniving friends trying to do this time?"
Hermione felt the answer force from her lips. "It has nothing to do with them. I was trying to steal the love potion for myself."
Snape looked confused, this was clearly not the anticipated answer. "Why would you do that? The Weasley Twins sell them. Why mine?"
Again the answer fell from her before she could control it. "I needed it right now. I was going to take it myself."
Snape still was not seeing the full picture. "Trying to keep a young romance alive? I thought even the stupidest student wouldn't stoop to that level to do so."
"No Sir." Hermione tried to hold back the answers, but the serum was too strong. "I wanted to give take it myself, so I could seduce you."
Snape looked even more stunned but that still didn't make sense. Why was she taking it herself?
"Why would you do that Granger?"
Hermione hated herself for this, but she had no choice, "Lovegood and I have a challenge. She bet I couldn't get you to have sex with me and I was scared so I thought if I took a love potion it would help me."
Hermione couldn't tell what Snape was thinking. His face gave nothing away.
"Is that the only reason you wanted to seduce me Granger?"
Hermione opened her mouth to confirm but the truth serum had a different plan. "No. I think the Gryffindor Head Girl having sex with the Head of Slytherin is hot as fuck."
Their eyes met, and Hermione turned bright red. What the hell was that? She had just said that to his face; to her Professors face and Snape none the less. But she had the serum, so she knew what she said was true.
"Really Granger? You want to fuck your Professor?" he asked as he took a step towards her, lust in his eye.
"God yes," Hermione blurted. She could feel her panties drench with anticipation and as he stepped towards her she could feel her insides fluttering. She couldn't believe it, she really wanted this. This stupid challenge had brought out a side of her that she didn't know she had and apparently that side wanted to Snape to fuck her brains out.

He grabbed her shirt and pulled her close, his fingers unbuttoning her white shirt.
"How bad do you want this Granger?" he growled.
"So bad Sir. Please fuck me."
He smiled and pulled her tie and shirt off her body. He kept eye contact while he reached round and unclipped her bra. This was so wrong, and she knew it and that made her want it so bad.
"Okay Granger. Seeing as you and Lovegood are such sluts I will fuck your drenched hole and make your slut body feel good."
Before she could respond his mouth was on hers and he was kissing her deeply, his tongue dipping in and out of her mouth while she responded hungrily. He went to remove his cloak, but she stopped him.
"Leave it on. I want you to look the way you do when we're in class."
His nostrils flared at her words, he loved how slutty she was being.
"I'm going to make you feel so good," Snape growled pushing her against the wall, getting on his knees in front of her. She felt him drag off her panties but left her skirt, socks and shoes on and she loved that, it made it feel so much naughtier.

He put his face right next to her soaked pussy and looked up at her. She wanted it so bad and she hated herself a little bit for that but that didn't mean she wanted him to stop. He grinned when seeing the lust burning in her eyes.
"Tell me you want this again and I'll make you moan"
She didn't even need the serum to know what she was saying next was true.
"I want it so bad Sir. I want to cum over your face and then your cock again and again."
He smirked at her and then pushed her legs apart and put his tongue between her folds. She moaned, finally he was making her feel good. He licked and sucked her sex and it had her moaning and gasping.
"Yes sir, please keep going. Merlin it feels so good."
He reached behind her to squeeze her ass and pull her closer into his mouth and that was all it took for her to reach her first orgasm.
"FUCK YES SIR. LICK UP MY CUM"
He didn't stop when she came. He reached her other hand up between her legs and slipped two fingers inside her trembling hole, which made her knees buckle and she had to reach behind her to hold the shelves to keep herself standing. They slid in and out of her with ease, her juices making it slick and he slipped a third finger in easily.
She knew it wasn't going to take long to cum again and when he moved his hand off her ass to pinch her nipple she reached her second orgasm easily, moaning and pushing his head into her pussy while she continued to cum.

Once her orgasm had subsided Snape stood up and pulled her away from the wall. There was no desk in this room, just shelves on all the walls, so Hermione wondered how they were going to fuck.
"Bend over right here, hands on the floor." Snape snarled.
As she did she could hear him pulling down his pants and she let out a little moan just thinking about getting fucked right here in the Snape's private stores.
He pushed he legs apart and she felt him press his cock against her hole.
"Fuck yes. I'm ready for your cock. Please fuck me."
"Okay you little slut."
Snape pushed into her, it glided in easily with how wet she was, and he went straight into fucking her hard and fast, holding her hips and pulling her onto him while snapping his hips into her. It was deeper and hard and hard Hermione's eyes rolling back into her head and she was moaning freely.
"Your pussy feels so good Granger. You're so wet and tight. Does it feel good to have your Professor inside you?"
"Yes sir," Hermione moaned, "I love feeling your cock slamming into me."
Snape groaned at her words. It had been a long time since he had fucked and to have it with a sexy young woman who was so desperate for him felt too good to be true.
"You like being fucked right here in a store room like a whore? Anyone could walk in and see you begging me to fuck you."
The words made her nervous, but it also turned her on even more.
"Fuck yes, I love it." Hermione was moaning over his cock and she didn't think she would last long before another orgasm. "I love that anyone could see us. My friends would think I'm a dirty whore and I love that."
"Fuck you are a whore." Snape groaned, urgently pulling her onto his cock rough and hard. "You're a horny little slut that loves thick cock."
Just hearing that pushed her over the edge. Luckily, he was holding her hips because her arms went weak while she came hard over his cock. He felt her pussy squeezing him and he had to fight not to cum in her right then. He pulled out once she had finished moaning and pushed her back against the shelves.

He put her hands against the shelves and pushed she legs open again and he swiftly plunged back into her. After a few thrusts she was holding onto the shelf tight to keep her steady. He was slamming into her rough and harder than before, so hard the shelf was shaking, and he was almost lifting her off the ground with his thrusts.
He reached one hand up grabbed a handful of her hair and pulled it tight, still slamming inside her started whispering how good this was in her ear.
"Fuck you feel incredible Granger. Your body is so hot and soft. I want to fuck you forever."
Hermione couldn't respond with anything other than moaning and whimpering. Knowing this was wrong and feeling how good he was making her feel was making her even hotter.
Snape used his other hand to pinch and pull her nipples and she felt herself rushing to the edge.
"God Professor, this is too much. I want to cum. Please make me cum on your cock again."
Snape groaned at her words, God she was a hot piece of ass.
He moved his hand from her nipple to her clit and rubbed and she came undone in less than a minute. She was screaming loud and he felt her squirting over his hand. He loved how he could make her cum so hard, but he could tell she couldn't take much more so it was time for him to cum.

He pulled out of her and turned her around to face him, kissing her deeply before pushing her to her knees. This was the first time she was seeing his cock and looking at how long and thick it was she could see how it was making her cum so hard.
She knew what he wanted, and she took him in her mouth straight away, moaning at the taste of her and him mingling together. She had to use a hand to work the base because even when she took it all the way to her throat she still wasn't taking his whole cock.
"Fuck Granger you are a dirty little slut. You suck cock so well."
She loved the sound of him groaning just from her mouth and she reached down to her pussy and began to rub her clit, so she was moaning with him.
Feeling her moan around his cock made the blow job feel even better and he knew it wasn't going to last long.
"Make yourself cum Granger. When you cum I'll cum in your mouth, I'm so fucking close."
Hermione was so sensitive from everything her had done to her, it didn't take much before she felt her eyes roll back and she was cumming and squirting again.
As soon as he looked down and saw her cumming Snape grabbed her hair and fucked her face hard and fast but like he said he was close, so it wasn't long before he was exploding in her mouth moaning loud and yelling her name.
She swallowed every drop and released his softening cock. He put his cock away and collected her clothes strewn across the room. He got her to her feet and helped her dress, with a tenderness that shocked her.

When she was dressed and ready to go she didn't know what to say so she turned to leave without a word. Before she could leave though he grabbed her hand and looked her in the eye.
"Don't try steal from here again Granger."
She blushed and nodded, it shocked her that she had risked expulsion for this deal with Luna and she would not be doing it again.
"We can never do that again Granger," Snape couldn't believe he risked his job for this, "but I assure you, I will never forget this either."
She blushed deeper and ran out, she was embarrassed at how horny she was becoming but she knew that she wouldn't be forgetting this for a long time either.

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(Thank you to whoever let me know the format had gone WILD. It didn't look like that when I uploaded so I have no idea what happened but I'm sorry it went like this. Please let me know if anything like this happens again! Also please let me know any pairing ideas or scenarios you have in mind! I love to hear new ideas!)