Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/461409.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Harry_Potter_-_J._K._Rowling
  Relationship:
      Harry_Potter/Severus_Snape
  Character:
      Harry_Potter, Severus_Snape
  Stats:
      Published: 2012-07-16 Words: 1800
****** Chalk Dust ******
by mmmdraco
Summary
     Harry has to draw Snape a diagram. Snape makes corrections.
Notes
     Disclaimer: The characters in this story are mine only in spirit and
     voice. Their "likenesses", names, categorizing features, favourite
     activities (other than the randiness I like to make them engage in),
     studies, teachers, friends, acquaintances, etc., etc., belong to J.K.
     Rowling and not me. Rating: NC-17.
"Potter, what exactly were you brewing in class today?"
Harry Potter, seventh year student and wizarding world savior, turned to his
Potions professor, Severus Snape, just as he was about to head out of the
classroom door. Confused, he wrinkled his brow. "Sir?"
Snape did not look up from the notes he was writing. "I asked what exactly it
was that you were brewing in my class today, Mr. Potter, for it most certainly
was not Scar-healing Salve, and I do believe you might have actually been able
to put that to some use."
Gulping, Harry took a step backward, having been the last person to finish his
cleaning and thus the last student in the classroom. He turned to his professor
and clutched his books to his chest. "I'm sorry, sir. I was pre-occupied today
and... I'm sorry."
"Well, you've proven that you've capable of repetition. Perhaps now you can
tell me why you brewed a Prophylactic Potion, incluso lubrido, when the only
ingredient that potion shared with today's assignment was the water, and not
even in like amounts." Snape did not look up.
Putting his books down on the desk nearest him, Harry closed the door and
muttered an assortment of locking charms before walking over to the blackboard
behind Snape, picking up the dusty eraser, and clearing away most of the
jagged-scripted scrawl that comprised the recipe for the day's lesson. Setting
down the eraser, Harry picked up a worn piece of chalk and began sketching an
image of two naked men in an embrace more crude than the drawing. To further
the idea, Harry drew in several arrows, sketched a flask of potion and directed
it into the scheme of things with more arrows. When he was finished, he turned.
"That was why I brewed the potion. Any questions?"
Finally turning, Snape licked his lips discreetly as he saw the drawing.
"Nicely done, Mr. Potter, however, I have issues with some of you assumptions."
He cleared his throat and stood, approaching Harry. Grabbing the chalk from
Harry's hand, Snape reached over his student's shoulder and erased a line with
a long finger before drawing a slightly adjusted line in its place. "For such a
situation, this angle would be more effective, as well as realistic."
Narrowing his eyes slightly, Harry turned slowly. "Oh?"
Snape drew in an additional arrow with a dotted line. "This is also a viable
option."
Harry shook his head. "I don't think I understand that."
Boxing off a small area right in front of Harry, Snape reached under Harry's
arms to detail an enlarged drawing, nicely done for chalk on a blackboard.
However, in order to really do the details, he had to step forward slightly,
pressing against Harry just enough to let his student become aware of his
presence. Harry pressed back against him, giving Snape even more "presence".
Growling slightly, Snape pushed forward until he was firmly pressed against
Harry's backside and Harry's pelvis was against the chalk tray. "It seems that
you just want to have your pretty little ass fucked, Mr. Potter. Is that it?"
Harry's hands rose to press helplessly at the blackboard. He realized that he
was hard and throbbing, his erection pressed firmly against the eraser in the
chalk tray. His hands gradually fell to his sides, catching momentarily on the
chalk tray, his fingers dragging neat black furrows in the thin layer of chalk
dust on the board. "Professor Snape..."
"Does that pristine ass need to be deflowered or have its petals seen every
nook and cranny of this school?" Snape began to move his hips in a small half-
circle. Harry didn't respond for a moment, but pressed back wantonly a moment
later. "You've got a virgin ass, Potter? Well, let's see how long that lasts."
In a moment, he was on his knees behind Harry, pulling the boys robes up. His
hands reached up and pulled Harry forcefully away from the wall just enough to
get in to undo his belt and pants. They fell around Harry's ankles to reveal
that Harry wore mismatched socks.
"I'm going to eat your ass," Snape growled out as he trailed his fingers up
Harry's legs, spreading the boy's sweet thighs. "I'm going to fuck you with my
tongue and taste you and stretch you until you ask me to take you, and then I'm
going to slam my hard cock in your tight ass and fuck you until I come. By the
time I do, you'll be drowning in your own come and wanting to return the
favor."
Snape's nose nuzzled gently between Harry's cheeks, then his hands spread them.
Harry's hips tilted toward him and he reached out to press his lips firmly and
quickly on the softest part of Harry's inner thigh. Harry trembled and pushed
his hips out even more. "Naughty, wanton little boy. You cease to surprise me,
sometimes. No one ever taught you restraint, and yet I'm still the first one to
see you like this? It's a surprise. After all, everyone wants to get into Harry
Potter's pants. It's a question of when, not if." Before Harry could respond,
he felt the first touch of Snape's tongue to the puckered ring of flesh that
seemed to flex along with every throb of his weeping cock.
Snape delved within him, his tongue tasting his student's musk and embracing
his aroma. He prodded within him, coaxing the muscles to give way. He caressed
it with his hot tongue, occasionally slipping further in and wiggling about a
bit more.
It wasn't long before Harry's balls pulled up against him and he came, spurting
long blasts of his seed against the inside of his robe. Snape did not let up on
his actions. His tongue merely strove to dive deeper, but he pushed in all
directions. Harry's hands rose from his sides and he clutched the chalk tray,
his erection still throbbing and caught between his stomach and the dusty
eraser. His hips moved in erratic patterns, Snape's hands finally coming up to
grab his hips and wrench him into place for the most pleasure.
Snape withdrew for a moment, then delved back in, repeating the process until
Harry felt that Hagrid could enter him with no trouble. Then, Snape pulled
away. His hands still held Harry's writhing hips at bay, his breath was still
warm and maddening on Harry's thighs. "Professor..." He breathed out a shaky
sigh and tried to grind himself forward, but those strong hands held him still.
Resigned, he lay his cheek on the blackboard and said, "Professor, I beg of
you... Fuck me. Now."
It only took Snape a moment before he had Harry impaled on his shaft. He used
the momentum he gained in standing to thrust within the boy after moving away
his clothing.
Harry lay his forehead on the chalkboard and moaned softly. "Oh..." His lips
trembled and he could feel the chalk dust that now lightly coated his hands,
his cheek, his forehead (scar and all) and the tip of his nose. He was
stretched around Snape's hard cock and it had all happened so quickly. He'd
made the potion early because he was thinking of attempting to seduce Seamus
since being famous, a seventh-year *and* a virgin didn't seem to mesh well.
However, he expected that seducing Seamus would have been much more difficult
than this had been, though it hadn't been planned, and it certainly was
pleasing.
Snape moved his hips experimentally and smiled slightly at the way Harry's head
flew back to rest on his shoulder, his thighs spreading a bit wider as he
pushed back, impaling himself even more. Snape worked himself in and out of
Harry's entrance slowly, building up a good pace. It didn't take long before he
was thrusting with enough force that Harry's feet didn't touch the floor for a
moment with each thrust and his chest rubbed firmly against the blackboard,
erasing a good portion of the drawing he'd done as he arched his back and
writhed, trying to get some leverage. In doing so, he found an insanely
"comfortable" position. It was only a moment before he felt his cock twitching
and flooded the insides of his robe with torrents of come again.
At that, Snape grabbed his student around the middle and maneuvered him so that
he was turned around along with Snape, and spread over the Potion Master's
desk. He began to thrust harder, burying himself again and again as deeply
within Harry as he could manage. Harry's hands clenched across the tabletop and
he felt parchment crinkle between his fingers.
Snape's movements quickened and his balls were hitting Harry's with every
thrust. He let one hand trail down between Harry's legs to grasp at his cock,
his hands sliding slick across the surface because of the boy's own cooling
come. "I always knew you were a naughty boy," Snape grunted out between
thrusts. "Such a tight ass, too. Beautiful."
And they came, in more or less unison, with Harry arching back and Snape
leaning forward, supporting one another as they spent themselves. Harry bit his
lip at the new sensation of having a load of hot come pumped deep within him as
he came for the third time in only a short while, Snape groaning slightly
against his shoulder and still massaging Harry's cock gently.
Snape slipped out a moment later and leaned down to place a surprisingly gentle
kiss on Harry's shoulder. "You should go now, Potter. There are sure to be
people looking for you soon and you might want to get cleaned up before all of
that. You are a mess." He unconsciously traced Harry's scar, brushing off the
chalk dust. "Yes. You should go."
Harry pulled away slowly, walking on unsteady legs like a newborn foal after
pulling his clothes back into place. He grabbed his books, clutched them in
front of him, unlocked and opened the door; leaving, though he couldn't help
but look back once and mumble out, "Thanks."
With a barely revealed smile, Snape nodded to Harry. "My pleasure, Mr. Potter.
Next time, let's have tea first and you can tell me about yourself."
Taking one step back into the room, Harry shook his head. "No. The whole world
knows enough about me. Next time, you tell me about you." He smiled, and was
gone.
The Potions Master did not protest. Instead, he stood and grabbed the eraser,
smirking at the small wet spot on the backside of it, massaging it with his
thumb until the chalk dust it mixed with clumped. Noticing the time, he quickly
erased the black board of all of the remaining bits of the drawing, and the
notes from the last lesson. "Mr. Potter... you are a wonder after all."
Please drop_by_the_archive_and_comment to let the author know if you enjoyed
their work!