Sapphire didn't need to feed often, but when the hunger finally became insatiable, she was ravenous; taking people's stamina and energy in a violent, careless stupor that she hardly remembered the details of after the fact...
...Which was why she decided to prey on a fortunate human or two a few days before she reached that point. It was sunset at the small college, and there were lots of people wandering around, wholly ignorant of her presence as she sat naked and invisible on a warm, gently sloped rooftop.
A shame you couldn't sunbathe while invisible; the light just went right through you.
She stood up and unfurled her wings, Stretching was one of those things she needed almost as badly as sex. How did those humans stay seated for an hour or more at a time? After giving her wings, arms, and tail a good outward stretch, she did a few squats to make sure her legs didn't fall asleep, her chest bobbing happily as she bounced up and down.
When the stretching was done, Sapphire peered at the sparse selection of humans below, and decided that the campus was empty enough for her liking, while still having options of people to target. As she sat at the very edge of the rooftop, naked legs dangling invisibly over the edge and enjoying the crisp air, she peered downward at the grassy field flanked by several brick buildings. Both the physical forms and the inner arousal of everyone below were crystal clear. Most people didn't have that high of a baseline arousal. They carried on with that inner fire only sparking up every now and then...
College students and professors were oddly horny. Perhaps it was being around lots of attractive people that did the trick; twenty-somethings were good looking. And maybe when you were a college student and had nothing better to do than attend classes, study, and relax, you developed urges for something more exciting...
And sometimes even among college students, some people buzzed with constant horniness. Those humans were easy to seduce. Magic wasn't even necessary most of the time. A lot of men will just slide their dick between your tits if you ask them nicely enough, a day's worth of unspent energy flowing out into you as you suck it up...
Sapphire stopped fantasizing and started picking her first target. Ideally, someone with a high baseline horniness who was attractive, clean, and healthy was the perfect target. But sometimes she felt like going after people who didn't fit the attractive description just to spice it up.
Someone coming over from the tennis court caught her eye, but when she saw all the sweat on him, she grumbled in disappointment and kept looking.
Then, another good target caught her eye. A skinny young man with terrible taste in glasses walked out of the building opposite of her with a single overstuffed green folder tucked under his arm. It looked to be on the verge of falling out of his grip, but he kept adjusting it so that it didn't. His baseline horniness was low, but his fashion sense befuddled her. Really? Jean shorts--commonly given the sickening name "Jorts"--and an orange sweater?
This was a man that nobody was going to be banging any time soon. A shame, given how good he looked aside from that. Those were nice shoulders and breedable hips--not that she planned on breeding anyone tonight. Reproducing wasn't on her to-do list. Feeding was.
He had a unique charm to him. Sapphire decided right then and there that he would be her first target--assuming she could corner him somewhere alone.
She watched as he walked away, to the right, and towards the theater building... That one was always empty at this time of day.
Still invisible, she hopped off the roof and gently glided down, landing silently on the sidewalk. As she approached the theater building, she started changing her appearance; she felt like being tall today, so she added a few inches to her height, putting her above the average height of most men. Next, the wings had to go, as did the tail and horns, so she let them fade into nothingness. If she turned visible, she could now pass as a human; albeit an unusually tall one, and one who probably had five minutes before those annoying police arrived and tried to arrest her for public nudity. The last time they got involved, she had to chase six people down and erase their memories; not pleasant. At least it was a good feeding day for her.
Sapphire focused on the task at hand. She was almost at the theater building, and that lovely student in the hideous outfit was almost inside. She approached with silent grace, and as he pushed the door open, she slipped in behind him, taking the chance to gently, gently slide a single invisible finger against the back of his neck, exhaling as she worked her magic on him. A blue heart-shaped mark visible only to Sapphire appeared on the back of his neck.
Now she didn't have to be afraid of losing track of him; she would always know where he was, at least until a few hours passed and the mark went away on its own.
As he approached the men's bathroom, she decided to enter the adjacent women's bathroom; checking carefully to make sure nobody was watching, of course. She pushed the door open, seeing if anyone was inside. Nobody was in the stalls, and no guys were hiding in the bathroom, spying on their fellow female students like someone was the last time she visited this bathroom. What a moron that guy was; hopefully the hypnotic suggestions she gave him put an end to that spying behavior, and hopefully he still had the pegging fetish she also planted in his mind.
She entered the stall in the back and closed the door, then focused on her appearance. Short blonde hair seemed good, so she transformed that. Brown eyes seemed trendy. And a bit of an increase to her already large chest sounded fun.
She turned visible, then thought about what clothing to add. Today felt like a business attire day, so she went with a black suit and red tie, and as she concentrated, mist coalesced around her body, forming threads, then fabric, and then finally, a set of clothes that surrounded her, including black underwear, black shoes, and everything else.
She stepped out of the stall and looked at herself in the mirror, then straightened her tie and adopted a neutral, serious expression on her face, getting into the business mindset. Then she got an idea. No, not business, but a government mindset. If anyone asked what she was doing, she would simply say it was classified. Nobody argued with you if you were in a suit and tie and spoke confidently.
That hideously dressed student was still in the bathroom, so she waited outside. It didn't take long for him to emerge.
"Sir," Sapphire said. "You'll have to come with me."
He stepped back.
"Um, uh, miss, there has to be some mistake..."
"Follow me."
"Am I in trouble?"
"It depends on what happens over the next few minutes. Now follow."
His arousal was starting to climb. Without a doubt, it was due to her rather prevalent chest. She made sure to step in a way that made it shake a little harder.
Nobody interrupted them as she led him to a door leading to an unused music room. It was a medium sized room with gray carpeted floors, and it was disused for its terrible acoustics and slightly low ceiling. Nowadays, it was used solely for two things; storage of random crap nobody planned on using anytime soon, and Sapphire's fun times.
"So, uh, what's all this about?"
She didn't answer. It gave her power over him, denying a response. As she opened the door and waved him inside, she saw him almost shivering... and his arousal was going up. Going into a room alone with a big breasted lady tended to do that to people.
She shut the door and locked it. She'd cast a silence spell soon to make sure no sound escaped the room, but for now it wasn't necessary.
"I can tell you what all this is about," Sapphire said. "But first I'll have to search you."
"Oh... okay." he feebly said.
"Turn around, boy."
He obeyed, and she pressed her body against him; her breasts squeezed against his shoulders, making him shiver, and her thighs did the same.
She started groping the sleeves of his hideous sweater, then she moved to his neck and chest, pressing her hands against them.
"Am I being arrested or something?"
"Likely not so far," she said as she ran her hands over his sweater and across where his nipples were.
"What are you looking for?"
"Drugs. Weapons. Anything that would be rather irresponsible to carry around campus."
"Come on, please, I didn't do any--"
"Silence," she said, subtly casting the spell on the room, dulling all sources of outside noise. The shift in ambient sound was barely, just barely noticeable to a trained observer paying attention, but this nervous, aroused, godawfully dressed wreck in front of her probably wasn't going to notice.
"Hey, did it just get really quiet?" he asked.
She guessed that he was probably some kind of music student or something. His noticing didn't matter, but she was impressed by his astuteness.
"Yes. It got quiet because we stopped talking. Now let me search your hideous jorts. Seriously. Who dresses like this? An orange sweater and a pair of jorts? Really?"
She couldn't help but say all that out loud.
"My uh, my other clothes were in the laundry."
"What's this?" she said, tugging at his underwear. It was bright red; almost fluorescent.
