Detention

AN: This is my first ever attempt at writing fanfiction so go easy on me please! Tell me what you think! I don't mind honestly even if it's brutal.
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There he was yet again. Detention. With none other than Professor Snape. Harry had knocked over a rare ingredient during class; Snape was not pleased. Clearly.
Harry was forced to clean up the mess he made as well as the cauldrons from other students. While he cleaned he began to fantasize. He imagined Snape coming up behind him, bending him over his desk and pounding into him. Harry shook these thoughts from his head knowing all too well that he was not alone in the room and could not afford to get hard right now.
Snape noticed the boy's spaced out expression as he watched the boy clean. Wondering what he could be thinking about, Snape walked gracefully towards the boy. "Potter, you are not here to daydream on my time," sneered the Potions Master. "If these cauldrons are not clean by dinner you'll be back here tomorrow," threatened Snape. Harry felt his face redden as he thought about his fantasy and just nodded, praying Snape didn't notice he was hard. There'd be no way Snape would let him live that down.
Snape continued to watch the boy as he scrubbed the cauldrons, wondering why he was so red in the face. Snape glanced down the boys body noticing something peculiar.
"Stand up, Potter," demanded Snape. Cursing silently Harry said, "Professor, I really don't want another detention." Snape glared at him and said, "Do as I say or you'll have a weeks worth of detentions."
Reluctantly Harry stood up, praying that his robes covered him enough. They didn't. Snape couldn't believe it. Harry Potter, hard as a rock in his classroom. "Tell me what you were thinking about just now," ordered Snape. Harry just looked at him begging silently that Snape would leave him be. "Tell me," he demanded once more and Harry knew there was no getting out of this. He could lie, but he was sure Snape would see right through him. So, he gathered all his Gryffindor courage and told the truth, "I was thinking about you, Sir." He admitting hoping the older man didn't want details. Surprise went through Snape briefly. Composing himself he asked, "What about me?" Harry looked at the floor, too embarrassed to meet the Professors dark eyes. "I was thinking about what it would be like to have you bend me over your desk and fuck me." Harry spat out, risking a look at those dark eyes. He saw shock flutter through them before the man regained his cold stare.
To say Snape was surprised would be an understatement. He wondered if he was hearing things, but judging by the boys red face and sheepish look he had heard all to correctly. Harry Potter wanted him. Severus Snape.
Snape stepped closer to Harry. He then reached out and palmed Harry's cock. The boy gasped in surprise, then moaned as the hand rubbed along his cock. Harry looked at the man and saw lust clouding his eye. The hand that wasn't on his cock reached up to take off Harry's robes, letting them fall to the floor.
Snape then moved the boy, now standing behind him, and pushed him towards his desk. When the boy was standing in front of it, Snape pressed his body against Harry's. Harry gasped as he felt the Professors hard cock against his back. "How would you like if I made your fantasy a reality?" Snape purred in the boys ear. Harry could only whimper in response. He couldn't believe this was happening. Then Snape turned him to face him. Taking a couple steps back Snape said, "Strip for me." Harry sputtered. "W-What?" Was all he got out. "I'm quite sure you heard me loud and clear, Mr. Potter." Snape said. Harry's face couldn't get any redder as he began to pull his shirt over his head. He then moved his hands to his trousers, unbuttoning them and sliding them down his hips so the fell around his ankles. Kicking him aside he began to peel off his underwear, exposing himself to Snape.
Snape just admired the boys toned body for a minute or two. It had been some time since he had seen a teenagers lean body.
Stepping up to Harry, Snape wrapped his hand around the boys weeping cock, pulling a moan from the boys lips. The sounds he made as Snape began stroking were intoxicating. Snape knew he'd never get enough of this.
Snape was caught off guard when he felt trembling fingers trying to unfasten his own robes. He decided to show the boy some mercy and stripped out of his own clothes.
Harry stared at his naked Professor in awe. He began to run his hands along the Potions Master's chest, moving lower. Eventually Harry wrapped his own hand around Snape's cock. The moan that fell from the older man's mouth was like velvet. He looked at Snape's face as he stroked. His breath caught at the sight of Snape with his eyes closed and his head thrown back.
Suddenly, Snape stopped Harry's movements. He then fell to his knees so he was face to face with Harry's cock. Harry couldn't hold back the scream of pleasure that left his lips as Snape engulfed his cock in his mouth. Harry leaned against the desk, gripping the edge for support.
Snape continued to suck on Harry's cock, deep throating him and swallowing around the head. This action made Harry let out a strangled scream. "P-Professor... I'm so... close," Harry admitted. This only made Snape suck harder. Snape, expecting Harry to be loud when he came, given his previous volume, was surprised to hear the boy mewling as he released in Snape's mouth. Snape swallowed, then stood up. Harry pressed his body against Snape, hugging him as he recovered.
Snape held the boy until he felt kisses on his chest. Looking down he saw the boy sink to his knees and look curiously at Snape's arousal. Something then occurred to Snape. "Harry... Have you done this before?" Asked Snape. Harry looked up, blushing. "No," He admitted, "But I want you, Sir." As he finished talking he took Snape in his mouth, trying to repeat what Snape had done to him. He sucked as hard as he could, bobbing his head up and down the shaft.
Snape buried his hands in the boys hair, moaning. As he felt himself get close he pulled the boy to his feet, finally kissing him. As they kissed Snape pushed his tongue into Harry's mouth. When they finally separated Snape looked at the boy in the eyes. "Are you sure?" He asked. The boy, unable to speak from the intensity of the kiss, nodded.
Snape lifted the boy and settled him on the desk, pushing him so that he was laying down. The Professor pushed the boys legs a part, then spread his ass cheeks to look at the puckered entrance. He bent over and swiped his tongue across the hole. The boy gasped at the foreign feeling, then began to moan again. Severus continued to lap at the entrance, then circled his finger around it, lightly pressing against it. He let his finger slowly slide in the boy feeling the muscles contract against him. He slowly pumped his finger in and out as the boy moaned softly at the feeling. Adding another finger Snape moved a little quicker, glancing at the boys face to make sure he wasn't in pain. He was greeting with a look of pure pleasure.
Deeming the boy ready, he removed his fingers and and lined his cock with Harry's entrance. Making eye contact with him, Severus began to push in, moaning as he felt the boys tight hole around him. Once seated in the boy, Severus held still, letting the boy adjust to his length. "Move, please." Pleaded Harry, "Severus, please." Hearing his first name from the boy was too much for Snape. He pulled out only to thrust back in. He gained speed and force and soon the room was filled with the sound of skin on skin and moans. Harry looked up at his teacher and moaned at the look of lust on his face.
Reaching his arms around Snape's neck, Harry pulled the man in for a passionate kiss. As they kissed, Harry screamed as his prostate was hit. Harry was overwhelmed with pleasure.
Soon he felt his stomach tighten and reached down to try and stroke himself, but Snape stopped him in favor of doing it himself. He stroked the boy in time with his thrusts. Snape watched the boy come undone. Watched as he screamed, arching his back as his come shot all over Harry's stomach and Severus' hand. The sight, along with Harry's muscles clenching around him was too much and soon he was coming as well, filling Harry with his seed.
They laid on desk panting, completely spent. Suddenly Harry spoke, "I don't think I'd mind another detention, Sir." Snape just smirked and said, "I think that can be arranged."
Then Snape picked up the boy bridal style and carried him into his rooms, and into his bed where they slept happily.