In retrospect, Lisette should have known as soon as Evangeline approached her asking for a favor, that it would have ended up like this: with her tied spread eagle to Evie's bed, completely naked, with her best friend standing over her with an unmistakably predatory gleam in her eye. The light's in the bedroom were dim, barely supplemented with a few candles scattered around, but Lisette could still make out the grin on her friend's face. Despite her apprehension, she could already feel her blood rushing to her slowly growing penis. It was little surprise to either woman, this was just the effect that Evie had on her. And on most people, for that matter.
"S-So, umm . . ." Lisette trailed off, gently tugging on her bonds. "You said something about helping you with an experiment?"
Evie let out a soft hum and trailed the tip of her index finger along Lisette's thigh, the deep olive tone of her skin standing out against Lisette's pale skin. "Did I now?"
Lisette whimpered and pouted. "You know I wouldn't have said no if you just wanted to play with me."
"I'm just kidding," Evie said with a wink. She stepped away from the bed, walking over to a cluttered desk on the opposite side of the room. "Do you remember when we were talking about my research the other day? How I was on the verge of a massive breakthrough?"
Evie would talk about a lot of things on any given day, most of which went over Lisette's head. But she liked to consider herself a good friend, and she always made a point to remember things that Evie was particularly excited about. So, when Evie had spent a full two hours rambling about how she might have finally found the thing she had been pursuing for the past two years, Lisette was sure to lock it in her mind.
"You mean the secret to Eroturgy?'"
Evie turned back to Lisette, clutching a stack of hastily scribbled notes to her chest, her previous predatory smirk replaced by the earnest excitement of a researcher in the midst of a discovery.
"I think I've found it!"
Lisette blinked, unsure if Evie was expecting her to be shocked. On the one hand, Eroturgy was an ancient form of magic practiced by a long-extinct civilization, with very few records of it remaining. No one ever truly expected to figure out how it worked, and most other historians and magi had long-since given up on studying it as a bad job.
But on the other hand, this was Evangeline D'Artois. Aside from being easily the most brilliant student in the Academy (both within the Mages' Guild and without) she was also unbelievably stubborn.
Even so, seeing the genuine excitement on her face, it was hard for Lisette not to break into a smile of her own. "That's amazing!" she said. "So how does it work?"
A slight blush tinged Evie's cheeks, but she simply smiled and answered, "Well, you know the basics of what Eroturgy is, right?"
Lisette nodded; the answer had been drilled into her head by months of talking with Evie about it. "'Eroturgy is the science of controlling the natural energies built up during sexual activity and converting them into magic. It was the most widely practiced form of magic in Ancient Corsaea before its civilization collapsed and all knowledge of how it was practiced was lost.'"
"Right. And no one's been able to figure the process out, because even if one were to figure out how to take control of it, sexual energy on its own is too weak, and it quickly dissipates once it leaves the body."
"And you've found a way around that?"
"Even better!" Evie said, her eyes positively shining. "I think I've managed to reverse engineer that ritual that ancient Corsaeans used to make Eroturgy work in the first place!"
Lisette's jaw dropped; her shock completely genuine this time. "You're kidding!"
"Nope!" Evie sat down on the chair she had set up next to the bed, her face split into the widest smile Lisette had ever seen her give. "And that's where you come in."
"Me?" Reflixively, Lisette tried to pull herself into a sitting position, only managing to rattle her chains. She had almost forgotten that she was tied to Evie's bed.
"The ritual requires two people. One person to gather and manipulate the sexual energy," she said, pointing at herself. "And one person to produce the energy." She pointed at Lisette.
"O-Oh, alright . . ." Lisette squirmed against her bonds. "How do I do that?"
"You don't have to do anything," Evie said, gently stroking the top of Lisette's sandy-blonde head. "Just let me handle it. But first, I need to explain how the ritual works."
Leaning back against her chair, Evie crossed her arms and legs. "So as I said, the main practical issue with Eroturgy is the dissipation of sexual energy into the atmosphere shortly after it is generated. The way this can be circumvented is by having the ritual practitioner coax the energies into staying connected to the one giving them off." As she spoke, Evie held up three fingers. "This requires three things: one, knowing how to manipulate the energy in the first place, which I've been practicing over the past few weeks. Two, once underway, the person performing the ritual can not under any circumstances touch the person producing the energy."
Lisette blinked. "But then, how will you—"
"I can use a little bit of touch at first, just to get started. But after that, too much touching will allow the energy to escape into the atmosphere through my body. I also don't want to risk overstimulating you, otherwise I might lose control. It's a bit like using a bit of lighter fluid to start a fire. It works to start things off, but you wouldn't want to keep using it much longer, or it'll create a mess." Evie's eyes roamed down Lisette's body, landing on her cock, which at this point was standing tall and proud. With a smirk, she said, "Though it looks like I might not even need touch to get you started."
Lisette looked away from Evie as her face grew warm. "Yeah, yeah. What's the third thing?"
She felt a soft fingertip push against her chin as she was forced to look back at Evie, who was leaning in so far that Lisette could feel her warm breath against her face. "No matter what," she said in a low rumble, "You are absolutely not allowed to cum until I am finished."
Lisette gulped, simultaneously aroused and unnerved. "Is that actually part of the ritual, or do you just like watching me suffer?"
Evie grinned, the predatory gleam back in her green eyes. "Both."
After taking a deep breath to calm her nerves while Evie returned to her seat, Lisette asked, "How long will it take?"
"Just a couple of hours."
Unable to sit up and protest, Lisette settled on glaring at her friend discontentedly. "How the hell am I supposed to control myself for that lo- ah!"
She was cut off by the sudden sensation of a warm hand wrapping itself around her penis. She strained against her bindings, unsure if she was trying to get away from the hand or trying to offer more of herself to it. She looked back at Evie, who wore an infuriatingly smug smirk.
"Don't worry," she said, running her thumb gently over the tip of Lisette's cock. "I'll take care of everything."
