Snape returned from a mildly terrifying Death Eater meeting, followed by the usual completely terrifying tea with Dumbledore, only to find Draco lounging in his sitting room, wearing a green velvet dressing gown and acting as though he owned the place. "How did you get in here?" he asked, then cursed himself for saying the first thing that popped into his head. He should know better, especially in front of a Slytherin and a Malfoy, even a baby one.
"Left your Floo open," said Draco, picking a small, delectable-looking chocolate out of the box balanced on one thigh and taking a rather unnecessarily sensual bite out of it. "Wanted to see my Head of House."
"I see," said Snape, tearing his eyes away from lips the exact colour of the inside of the shell of a Man-Eating Sea Turtle, and focusing instead on heavy-lidded grey eyes. "I'm here now, what did you require of me?"
Draco smiled slowly, eating the rest of the chocolate and taking time to suck the melted sweet off his lips before setting the box carefully on the small table beside him. "I believe," he said, undoing the belt of his dressing gown and opening it to reveal that he wasn't wearing a stitch of clothing underneath, "that I have something you require to relieve the frustrations of your evening."
"I... see," said Snape, unable to keep from eyeing the lean, pale form hungrily. Someone, Snape devoutly hoped Draco himself, had taken the time to bind Draco's cock and balls in an elaborate pattern of green and silver cords, and the tip was purple and swollen with obvious need. Snape dragged his gaze back up to meet Draco's, grateful for the years of training in keeping his thoughts off his face as he managed to keep his expression impassive. He raised an eyebrow and said, "What, precisely, do you feel you have to offer me, Mr Malfoy?"
Draco responded by spreading his legs slowly, unveiling the glistening pink pucker surrounded by dark gold wisps of hair, the entrance twitching and obviously oiled and ready. "I'm of age now," he said, as though he weren't flashing his arse at his Potions Master and Head of House, "and I thought we might be able to enjoy a closer relationship during the rest of my tenure here." Draco's hands, pale and slender as the rest of him, began to run over all that smooth skin, stopping to tweak a nipple or cup his balls, gather the precome off his cock and bring it back up to those shell-pink lips. "Don't you think you'd enjoy me, professor?"
Something inside Snape gave way, and he let out a low growl, stalking toward the boy, pulling out his wand with a wicked glint in his eye. With a flick of the wrist and a few muttered words, Draco's robe was Banished, and his ankles bound to his wrists, and then to the legs of the couch. Snape pulled him forward so his arse rested just at the edge of the sofa, and ran deceptively gentle fingers over the bindings on his cock and balls. "Tell me, my pet," he said, cupping Draco's balls gently, "who was it that bound you up like this?"
Draco took a breath to reply, and Snape stole it away by closing his hand and pulling, jerking Draco's balls painfully away from his body. Draco's eyes went wide and he gasped helplessly, a shiver going through his entire body. "I-I did, sir," he managed to stammer out, voice barely above a whisper.
"Good answer," said Snape, letting go and trailing his fingers downward. "From this moment on, no one touches you but me," he said. He circled Draco's entrance once, twice, three times, and then shoved his fingers inward, hard and rough, gratified for Draco's sake to find the opening slick and loose for him. "Understand?"
Draco nodded frantically, arse clenching around Snape's fingers, his cheeks flushed and stomach slick with precome. "Good boy," said Snape, pulling away his hand and beginning to work on the many buttons of his own clothing. He undressed methodically, slowly, watching Draco watch him, enjoying the boy's increasingly desperate glances down toward the place where his cock was trapped beneath layers of fabric and fastenings. "You know," he said, finishing one wrist and starting on the other while Draco panted and squirmed against the silvery ropes holding him helpless, "I do believe I shall enjoy this... new closeness."