The young Slytherin boy pushed his dark brown hair out of his face. He had set up a trap by the room of requirement as a favor for a Ravenclaw who had, ah, "helped" him with his transfiguration homework. The feather-head had asked some random Gryffindor chick out, and she had flat-out rejected him. That's life, and the Slytherin boy would have been happy to let it stay that way, but the Ravenclaw had threatened to rat him out if he didn't help him get his revenge.
The Slytherin COULD have just hexed the kid, but that wouldn't have been as much fun. Besides, blackmail was a trait he admired the book-banger would have made a fine snake.
He was shaken from his thoughts by the approach of his target. The Gryffer wasn't bad looking at all. She had sandy-blonde hair in a pixie cut, slender, smooth legs, and a nice chest. That just made what the Slytherin was going to do much more fun
Just after the girl had passed him, the Slytherin waved his wand and muttered "Locomotor Mortis" the leg-locker curse. The girl's legs snapped together, and she fell forward with a yelp, barel managing to catch herself in time. She rolled over and saw the Slytherin, and reached for her wand, but she was too slow. The Slytherin quickly disarmed her.
"What - !" she began, but was cut off by another incantation from The Slytherin "Mimble Wimble!", the tongue-tying spell. She could only utter unintelligible grunts and moans as her tongue tied itself into a knot in her mouth.
"Whaaaaa? Whooaaahhmm oooo?!" she tried to speak as the Slytherin rolled her over onto her stomach and pulled her arms behind her back, flicking his wand and summoning some cords to bind her forearms together in a strict box tie.
The snake did not respond, but instead opened the door to the Room of Requirement. Inside was a simple padded rubber room set-up, not unlike what you'd find in an insane asylum. He carried the squirming Gryffindor to the center of the room, and then dumped her unceremoniously onto her backside.
"Pweeeeaaassshhhhh!!! Pweash lemmeh goooo!" Tears pricked at the corner of her eyes. The young man might have pitied her, in any other situation. Still, business was business. But
"Sorry, but I've got a sleeping draught to finish brewing. I don't want to leave you in tears, though, so
" He pointed his wand at the girl. "Titillando!" The girl began to squirm and giggle and it would only get worse. The Slytherin had hit her with a Tickling Hex.
The girl's laughs and pleading moans were kind of erotic still, the Slytherin had places to be. He left the room of requirement, and shut the door behind him.