Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/23414.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      M/M
  Fandom:
      Harry_Potter_-_Rowling
  Relationship:
      Harry/Severus
  Character:
      Harry_Potter, Severus_Snape
  Additional Tags:
      Breathplay, Slash, Anal_Sex, Plot_What_Plot
  Stats:
      Published: 2007-12-27 Words: 1160
****** Do You Trust Me? ******
by torino10154
Do You Trust Me?
Rating: NC-17
Word Count: ~1100
Warnings: Breath play; looks like chan, feels like chan but really it isn't.
Summary: Severus brews a de-aging potion but Harry wonders if he was meant to
look thirteen.
Disclaimer: They belong to JKR.
A/N: Thanks as always to gryffindorj and also to sweetmelodykiss. Beta'd by
spidermoth.
 
"Do you trust me?" Severus asked Harry one evening as they were preparing for
bed in Severus's—no, their quarters at Hogwarts.
"Of course I do, Severus," Harry replied. And it was true. Harry trusted
Severus to take care of him and his needs, as well as expand his horizons in
the bedroom. Harry had had some sexual experience when they got together. But
not enough when one's lover was a former Death Eater who occasionally prepared
you by saying "I am going to fuck you now."
"Drink this," Severus said as he handed Harry a small glass vial.
"What is it?" Harry asked, and then tossed it back. Disgusting, of course, but
Severus had never pampered him.
"You will find out shortly," Severus said, his dark eyes glittering. "Now, go
dress in your Hogwarts robes and Gryffindor tie but nothing underneath."
Harry did as he was told; they would be playing professor and student again it
seemed. Detention certainly was more enjoyable now than it had been when he
really was a student. He couldn't help but wonder if he would have enjoyed
detentions with his professor a bit more, especially in sixth year when he'd
practically lived in the dungeon office for months, if there had been these
sorts of extracurricular activities at the time.
Returning to Severus's bed, he waited at the foot for further instructions, as
was their custom. They weren't in an official dom/sub relationship but
Severus's controlling tendencies, and Harry's willingness to do just about
anything that was asked, gave that appearance-especially in the bedroom.
"On all fours, Potter," Severus barked suddenly. Harry scrambled up onto the
bed and assumed the position. Not quite detention then, Harry thought to
himself, as that usually started with a bit of play acting.
He knew not to speak until he was spoken too but he began to feel somewhat
strange. It must be the potion taking effect.
"Severus?"
"Shh, my pet. You will be undergoing a small change," Severus snickered in his
ear. "This is a particular fantasy of mine. I've been waiting for a long time—"
his voice drifted off and Harry looked at Severus, as if for the first time.
His face was set in harsh lines. Harry shivered; Severus hadn't looked at him
like that since he really was a student.
Suddenly Severus lifted the hem of Harry's school robe up and bared his arse to
the cold dungeon air. He gave a hard smack to the muscled globes before quickly
spreading them to reveal Harry's puckered entrance.
There was little foreplay; Harry supposed he was lucky Severus was using lube
at all. When this sort of mood overtook the man, Harry was often quite sore the
next morning.
After only two fingers, Harry felt his lover move behind him. He was still
fully dressed; only his cock was freed from his trousers. Severus reached
around and grabbed Harry's school tie, wrapping the extra length in his hand,
like a leash. He pulled it harshly, Harry's head snapping back as Severus
thrust into him in one rough motion. Harry would have cried out but he could
barely breathe—the tie tight around his throat.
Severus rode Harry roughly and that was when Harry began to notice the change
that was overcoming him—he was getting younger, he was sure of it. And Snape's
cock felt larger and larger as he thrust into Harry's ever tightening arse.
Severus's grip slackened on the tie encircling Harry's neck as he concentrated
on fucking Harry hard. Harry turned around as best he could and was shocked at
the look of bliss on Severus's face. Watching Severus's expression when they
fucked was always extraordinary, but this time was different, making Harry a
little uncomfortable.
"What did you do?" Harry cried his voice not nearly as deep as it once was.
Severus groaned and opened his eyes.
"I gave you a de-aging potion so we could experience a proper professor/student
relationship," Severus's eyes glittered malevolently.
"But, Severus, I look thirteen!" Harry wailed as Severus changed his angle and
began pounding Harry's prostate, his cock practically leaving Harry's body
entirely before thrusting back in, his balls smacking Harry's smooth arse.
"A miscalculation," Severus panted. But when did Severus ever miscalculate,
Harry's mind supplied with some slight panic. He was the Half-Blood Prince
after all, cleverer than any with a potion.
"So hot, so tight, how did I ever restrain myself?" Severus said, as if to
himself.
"You, you . . . oh fuck . . . " Harry stuttered. He wanted to ask if Severus
had really desired him as a student . . . if he really looked at him that way
so many years ago, but his thoughts were incoherent—his throat dry. He felt a
little afraid for the first time in a very long time.
Severus once again had a tight grip on the tie; Harry felt the knot press
against his esophagus. He tried to take in a gulp of air but could not. The
edges of his vision began to blur and darken. He lifted his hand to pull it
away from his throat, just as Severus collapsed on his sweaty back and
whispered in his ear, "You are so beautiful, my Harry."
Harry gasped and rubbed his throat. What was that all about? He felt Severus
slip out of his arse—come running down his thighs. Harry felt his body
beginning to change back; his prick was still hard and leaking so Harry took
himself in hand and with a few quick strokes spilled himself on the bed. By the
time he recovered, his body felt normal again. He ran a hand through the sweaty
hair on his chest and breathed a sigh of relief.
Harry turned to look at Severus—face pressed into the mattress. "You're a right
filthy perv, Professor," he gasped.
Severus opened one eye to glare at the brat. "Mind the cheek, Potter, or you'll
be in detention for so long you'll need to buy new school robes."
"As long as it's me you're fucking—not some thirteen year old version. Can't
say I was too keen on that," Harry said carding his fingers through his hair.
"I'll make it up to you," Severus said as he rose to his knees and his lip
curled into a parody of a smile.
"I don't see how, as I've already come. I'm not as young as I once was. Well,
twice was, if you count . . . " Harry started, grinning, as Severus slipped his
hands behind Harry's calves and tugged hard causing him to fall to the bed.
"I'm sure we'll come up with something."
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