Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/2396582.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Harry_Potter_-_J._K._Rowling
  Relationship:
      Harry_Potter/Severus_Snape
  Character:
      Harry_Potter, Severus_Snape
  Additional Tags:
      PWP, Detention
  Stats:
      Published: 2014-10-03 Words: 2544
****** A Lesson in Lust ******
by clarabellas
Summary
     Severus gets a little more than he bargained for when Harry
     accidentally makes a lust potion.
Notes
     I am in no way, shape or form affiliated with the Harry Potter
     universe. That right belongs exclusively to the wonderful J.K.
     Rowling.
     That being said, I hope someone enjoys this.
The Potter brat really would be the death of him one day.
Severus Snape felt a derisive sneer tugging at his lips as he observed the boy
frantically work to rectify the potion that was rapidly beginning to bubble out
of control. At this stage, the ideal colour for such a potion was a soft lilac.
Potter’s was an angry shade of orange. Likely, the boy had forgotten to add the
powdered moonstone before bringing his cauldron to the boil. All-in-all, it was
not the worst attempt he had ever seen and if Potter acted quickly, it could be
saved. All he needed to do was add his chopped peppermint leaves, stir
clockwise seven times, before sprinkling in the valerian root and leaving to
simmer. Not that he expected him to know this, of course, because it wasn’t in
the textbook.
Severus felt mild surprise as he noticed Potter slide his peppermint leaves
into the brew and begin idly stirring. The potion faded to a much less garish
shade of orange and began to boil less furiously. Potter himself looked
shocked, as well as somewhat hopeful. The boy set down his stirring rod to the
side while he appraised his ingredients.
'The valerian root, boy. You’re almost there!' Severus thought furiously.
He had often thought that Potter had shown some promise in the field of
potions, if only he attempted to apply himself and not get distracted by other
students. Perhaps, if the boy salvaged his brew, Severus would refrain from his
insults for a few lessons.
Or perhaps not.
For some unconceivable reason, it was not his carefully sliced valerian root
that he added to the cauldron, but a whole dish of rose thorns. Rose thorns!
They were not even on the list of ingredients for the potion, so why they were
on his bench was beyond the potions professor.
“Potter!”
The boy jumped up in alarm, turning the heat on his potion down, before peering
up at the man from beneath his fringe. His green eyes glittered in what looked
like nervousness.
“Yes, professor?” The boy asked slowly.
Severus appraised the contents of the cauldron, shaking his head slightly.
Potter had actually succeeded, not in making the set potion, but something else
entirely. Instead of a cheerful yellow, the potion was a mauve colour. The
colour change was attributed to the addition of rose thorns, which gave the
potion entirely different properties. Not so far off a cheering potion, if you
thought about it, but not so close that it could be used in front of a room of
sixteen-year-old students.
“What, pray tell, have you concocted for me today?”
Potter took a moment to answer, “A cheering potion, sir?”
“If you took a moment to use that useless thing between your ears, you would
notice that your potion is entirely the wrong colour. As such, it is completely
useless”, Severus gritted out through bared teeth, “and you will be serving
detention with me tonight so that I might demonstrate what this potion does.”
Potter, unusually, did not argue, only nodded with a meek “yes, sir”. Across
the room, Draco Malfoy was snickering with Pansy Parkinson.
“Time is up. Bottle up your work and bring it to me before leaving. That
includes you, Potter.”
There was a hum of low chatter as the students set about to packing up their
workstations. Severus nodded to several students as they set their phials on
his desk before leaving to their next class. The last was Potter, who handed in
his work without lifting his head before rushing towards the door. Severus
scoffed lightly. He imagined that the brat was imagining many horrible
scenarios for his detention this evening. If that were the case, he would be
sure to not disappoint.
“My office at eight this evening. Don’t forget.”
Potter looked back at the professor for only a moment, nodded, and left.
Severus shook his head. He doubted Potter realised the true nature of the
potion he had made, and Severus really had no intention of harming the boy. No,
this potion would at the worst give the boy a healthy dose of embarrassment.
Severus was looking forward to it.
--
Potter was right on time, for once.
“Come in.” Severus called from his desk.
The boy shuffled through the door, before closing it quietly. He turned around,
but did not move. Severus scowled in annoyance.
“Potter, come here.” He snapped.
The boy marched towards his professor’s desk, and it please Severus that the
boy had fire in his eyes. Severus opened his desk draw and pulled out Potter’s
potion, setting it in front of him. He inclined his head toward the phial, an
expectant sneer on his face. Potter took a breath before unstoppering the
crystal container and knocking it back in one swallow. Now, they would wait. No
doubt the boy would start feeling the effects soon.
It did not take long at all for Potter to start looking uncomfortable. His face
was flushing red, and he began to moving from one leg to the other. Severus
smiled.
“Stop fidgeting. Do you know what you made today?” Severus asked lowly.
“No, sir.” Potter replied, voice shaking.
Severus thought as much. They would not be covering these sorts of potions for
another year, and while they had similar ingredients to more common mood
potions, they were not in the current textbook.
“When you added rose thorns to your potion, you inadvertently made yourself a
mild lust potion, Mister Potter.”
The boy’s eyes widened, and the flush extended down his slender neck. His
breathing became heavier and his hands clenched. Severus eyed the tell tale
bulge in his trousers. Potter shifted his weight from one leg to another in an
attempt to hide his arousal, but gasped loudly when the material shifted over
his sensitive cock.
“Is something the matter, Potter?”
Potter moaned at the sound of his voice and Severus felt his own cock jump in
response. Severus eyed the boys heaving chest and lithe body. He had often
thought this year that the young Potter was quite desirable, though never had
any intention of acting upon this.
“Do you require some…assistance?” Severus asked slowly, before he could stop
the words.
Potter’s face snapped up to look at his professor. His eyes were glistening
with desperation but the boy did not respond. Severus stood, grateful that his
own loose robes disguised his growing erection, and walked to stand mere inches
away from Potter’s tense body. Severus leaned towards the boy, breathing softly
against his ear. Potter groaned at the feeling, but otherwise made no move.
“Answer me, Mister Potter,” The professor murmured.
“Please, professor!”
“Please, what?”
“I don’t know!” Potter moaned in frustration, “Touch me, anything…please”.
The last was a whimper and Severus placed a light kiss under the boy’s ear.
Potter tilted his head to allow the man better access. Severus nibbled on the
skin of his neck, laving the bites with confident strokes of his tongue. The
other cried out in pleasure and gripped the older man’s shoulders to steady
himself.
“Are you sure you want me, Harry? Because I’ll make you earn the privilege.”
Harry nodded eagerly, clutching at Severus’s body. The man smirked and ran a
hand through the boy’s messy black hair before crashing their lips together in
a bruising kiss. Severus ran the tip of his tongue along Harry’s lower lip,
coaxing the younger man’s mouth open. He wrapped his arms around the boy’s
waist, pulling them closer together and explored his mouth ferociously. They
broke apart for a moment, and Severus knew that the boy could feel his arousal
against his stomach. Potter did not seem to mind and reached forward to connect
their lips once more. The second time was leisurely and gentle. Severus felt a
thrill at hearing Harry’s eager moans. Running a hand down the boy’s back, he
squeezed his tight ass gently.
“On your knees, Potter.” Severus gasped after they had broken apart.
Severus unbuttoned his robes quickly as Potter lowered to the ground and began
working on the man’s trousers. Pulling them down, the man’s cock sprang free.
Harry gazed upon it in trepidation, eyeing the length and rosy head. Severus
caressed the boy’s head in encouragement. Harry licked his lips quickly, before
leaning forward and tracing the pink tip of his tongue over the cock head.
Severus’s hips bucked forward violently. Harry then placed his mouth over his
cock, using his tongue to stroke the underside. The man buried his fingers in
Harry’s hair and let out a low groan as the boy hollowed his cheeks and
swallowed his cock until it hit the back of his throat.
“Yes, that’s good, Harry.”
The boy flicked his green eyes up to meet Severus’s black, and used his hand to
stroke the length of cock that his mouth could not reach. Having Harry on his
knees in front of him was one of the most highly erotic things that Severus had
witnessed. The boy was also a natural at fellatio, using a mixture of both
sucking and licking. Severus began to rock gently into Harry’s mouth. Severus
could feel a pressure building at the base of his cock and as the boy began to
moan around his length, he could last no longer. He had no intention of ending
this here, and reluctantly pulled Potter’s mouth away from his member.
Severus initiated a passionate kiss with the boy, and pushed him back against
his desk. The man tore off Harry’s school robes, discarding them in a heap on
the dungeon floor. He loosened the boy’s tie and slowly began to unfasten the
buttons of his school shirt; peppering light kisses over his chest. Harry let
out a shuddering gasp, clutching the edge of the desk until his knuckles turned
white. The shirt and tie jointed his robes on the floor, and Severus paused,
hands resting on the buckled of Harry’s belt.
“I am going to fuck you over my desk, Harry. Do you want that?” Severus said
while pressing open-mouthed kisses to Harry’s collar bone.
Harry nodded.
“What was that, Potter? I didn’t hear you.” The man demanded, thrusting his
hips against Harry’s rock hard arousal.
“Oh! Gods, yes! Please, professor. Fuck me!” Harry cried.
Severus unbuckled the boy’s belt, and shoved his trousers to his ankles.
“Step out. Your shoes, too.” The man instructed as he removed his own.
Severus appraised the young man in front of him, slouched against the dark oak
desk, face flushed and cock leaking pre-cum over a quidditch toned stomach. He
let out a breath he wasn’t aware he had been holding. The boy was beautiful,
and he was all his.
Severus turned the boy around and leaned him over the desk, placed his hands on
the far edge. Potter might want to hold on. He ran his hand over a smooth,
unblemished back, tracing each vertebra with a long finger. Harry shivered in
anticipation. Severus then ran his hands over the boy’s hips, before resting
them on his ass and spreading the cheeks so that he could view the pink pucker
between. His ass looked unbelievably tight.
“Tell me, Potter. Am I your first?” He queried as he teased the boy’s hole.
“Yes.” Harry whispered.
“Good.”
Severus pumped Potter’s cock lazily, smirking at the wanton noises that he was
drawing out of the boy. He kissed the boy’s spine before summoning a phial of
lubricant. He coated his fingers in the cool substance, before inserting one
inside of Harry’s ass. It was as tight as he expected. Harry groaned and pushed
back onto his finger eagerly. Severus responded by wiggling his finger gently,
until the passage was stretched enough to insert a second appendage. The man
began scissoring motions and smiled in satisfaction when Harry jolted and let
out a loud moan.
“Please, more!” he cried out.
“But of course,” Severus drawled as he inserted a third finger, “but I wonder,
Mister Potter. Your potion was hardly strong enough to cause this kind of
reaction…”
Harry gasped at the intrusion and mumbled something into his arm. Severus
massaged the young man’s head and let out a questioning hum.
“Do tell, Mister Potter.”
“I already wanted you before.”
Harry was heavily flushed, and Severus took a moment to slather his cock with
the remaining lubricant in the phial. He lined up his arousal with Potter’s
twitching entrance, and pushed in to the hilt with one smooth stroke. He took a
moment to let Harry adjust, tracing one hand down the boy’s side in feather
light strokes, while the other toyed with his still hard cock. When Harry
nodded, Severus pulled back slightly, and then pushed in again. His strokes
gradually became longer until he was almost completely withdrawn from Potter’s
tight heat, before thrusting back inside fully. The man knew he had hit Harry’s
sweet spot when the younger man let out a keening moan, towards which Severus
began to aim his thrusts.
The professor seated himself fully inside the boy, and then took a moment to
twist Harry’s position. Potter’s back lay flat against the desk, sprawled
across scattered parchment. Instinctively, he wrapped his legs around the older
man’s waist. The boy turned his face away, but Severus grasped his chin and
placed a firm kiss against his lips. Harry invited him inside his mouth without
hesitation. Severus slowed his pace, rocking inside Harry with short, but firm
strokes, and toyed with a nipple. The younger man moaned inside his mouth and
wrapped his arms around his neck.
“I wanted you, too.” Severus murmured in Harry’s ear, punctuating his statement
by tapping his cock against his prostate.
“Please, harder, professor.” Potter whimpered.
Severus could hardly refuse. Lifting the boy’s hips, he aggressively snapped
his hips inside the tight passage repeatedly. Slamming against Harry’s prostate
with every push, and feeling his release coming, Severus began to fondle the
younger man’s cock and balls. Harry came at his touch, crying out and
splattering semen over his chest and Severus’s hand. The older man could feel
Harry’s entrance fluttering around his cock as he climaxed and soon came inside
the boy with one last buck of his hips.
Severus remained buried inside the boy for a few moments, draped over his chest
and lazily kissing his neck. Reluctantly, he withdrew himself. For a moment, he
watched his cum trickle out of the boy’s reddened hole, before casting a
cleansing spell on both Harry and himself. Potter himself was still collapsed
on his desk, breathing deeply. Severus lifted the boy to a standing position
and took his lips into one last passionate kiss, carding his long fingers into
messier-than-usual hair. He helped the boy dress, and then dressed himself.
After this, he went to the door and opened it, gesturing for Potter to leave.
“But, professor…” Harry started.
“It is almost curfew, Potter. But perhaps you’d like to come back tomorrow to
serve another detention for your…cheek.” The professor smirked.
Harry’s face lit up in a grin. He jogged to the door, stopping only to brush
his hand against the older man’s. As he started down the hallway, Severus
called after him,
“Tomorrow at eight. Don’t forget.”
 
FIN
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