Having a human body was always so much fun for Black Mist for several reasons, one of them being all the sexual things he could do with one. This boy's body was so sensitive too, it gave the whole experience of using it an extra bit of flare. The boy was called Mihael, if he remembered rightly.
Sat on the the large, fourposter bed in Mihael's room, Black Mist let several tentacles spawn from his back, one pushing its way into his pants right as he unzipped them. Two others slipped under his jacket and shirt, teasing his nipples as the other stroked between his leg and the growing bulge in his underwear. More tentacles appeared and started tearing the clothing from his body as he moaned, then started wrapping around him and caressing all of the now bare skin, stopping whenever they found an especially sensitive area and making sure to continue giving it attention.
He already felt like a writhing mess when his tentacles started playing with his dick and balls, stroking and squeezing him. One of them wrapped around just right so it acted like a cock ring, not wanting him to cum too soon. A probing tentacle soon found it's way to his ass, secreting a translucent black liquid as it pressed into his entrance, the strange liquid acting as both a lubricant and an aphrodisiac.
Guiding another dripping tentacle to his mouth, Black Mist began sucking on it and deep throating it, swallowing copious amounts of the liquid and turning himself on even more. His own tentacles started acting against him, as though they had minds of their own and bound his arms and legs, several more pushing into his mouth and anus and writing within him.
After fucking himself nearly senseless for ten minutes he finally gave himself release and came hard, covering himself in cum and his own strange excrement. Moments later he sat up, wiping some of the mess from his face and licking it off his hand.
At his door, he saw Thomas standing and staring at him in horror. When Thomas realized that Black Mist had finally noticed him, he attempted to run, but the creature's tentacles were much too fast for him and dragged him into the room, closing and locking the door behind him. Black Mist forced him to kneel at the foot of the bed, binding his entire body so he could hardly move.
"Looks like I caught myself a peeping Tom~ Though peeping would be an understatement." Looks like he had a new toy to play with~