Darkside

"Oh I just love seeing your eyes open to how good it can be." The doppelganger kept laughing and laughing, the sound echoing over upon itself in the unfathomable cave. "It's the closest to altruistic I get to be, these days. I spend most of my time wrapped up in... other pleasures. But maybe you need just one more small push, before you're ready to let me into that pretty, pure little heart of yours."

Shadow Tsukino pulled back a little, lips pursed. Then she lifted a hand in front of Tsukino's face. Tsukino was looking at her with an expression of confusion and dread. She needed to get out. She needed to get out right now.

"Pay attention, magical girl," Shadow Tsukino instructed. "In a few seconds, I'm gonna reach down and slip my hand into your panties, and start fingering your cunt. I'm going to taste that delicious, shameful wetness you're trying not to think about. And you're going to stop me, of course, because that's what good guys do. But you're going to be a little too slow."

"I'll punish you." Tsukino hated how weak her voice sounded. She needed to get her strength back. She needed to be ready. She needed to win. Why did her muscles feel like jelly? "I'll... I'll..."

"Maybe you will," her doppelganger whispered. She flexed the fingers on the hand she was holding up. "We'll see if you're fast enough - in just a couple of seconds."

Tsukino did her best to make herself ready. She had to move, as soon as the doppelganger moved. But... why? "Stop playing games with me!"

"We're both playing games, silly," Shadow Tsukino purred. "You could have stopped me at any moment, right? But you didn't. Even now, you could just push me away. Why aren't you? Is it because you're curious? How naughty! How sinful. Maybe it's because it doesn't matter. It's just a little game, after all. No one will get hurt."

"Shut up," Tsukino muttered. It was so hard for her to concentrate on anything when her doppelganger kept talking and talking.

"But!" Shadow Tsukino kept flexing her fingers, one by one, in a slow, rhythmic pattern. Tsukino was staring at them as intently as she could. "You'll know. You'll always know. And won't that knowing just burn inside you? So, maybe you'll stop me. But then maybe you'll never know, and perhaps that's even worse. Because you really do want it, don't you? Just like I did. Even if it's just one little taste. Even if I tell you that that's how it starts."

"Just shut up already!" Tsukino yelled. And that was when her doppelganger moved.

Her hand darted down like a snake striking. In the blink of an eye it was between Tsukino's legs, exactly as she had promised. Tsukino made to stop her with a desperate, uncoordinated swipe, but she wasn't fast enough.

A loud, needy gasp of pleasure escaped her throat when she felt Shadow Tsukino's fingers inside her. Right on its heels came the giddy laughter of the doppelganger. She seemed to be growing even greater and darker the more confused Tsukino became.

"Too slow," Shadow Tsukino said mockingly. "You lose. Now enjoy your penalty."

Tsukino couldn't keep her eyes open as her doppelganger curled her fingers inside her, reaching wickedly deep in a way that made her whole body throb with pleasure. She couldn't look at herself. She tried not to hear herself moaning. The shame of it burned to it. It couldn't be her making her sounds, or starting to grind her hips against her shadow self's fingers.

"Isn't it fun?" Shadow Tsukino whispered. "I know exactly where to touch you. I know how you touch yourself at night, and some of the places you haven't figured out yet. Like..."

She pushed deeper still, moving her fingertips at a certain angle, and suddenly they hit a certain spot that was like the fuse of a firework. Tsukino's eyes flew open and all she could see was white. She completely lost control of both her voice and her body. The magical girl felt like a puppet; like her doppelganger was playing her like a violin. Sex had never felt so good. Was this sex, or masturbation? It felt like something different. Something worse. But that only made it feel better. Shadow Tsukino's laughter was everywhere, along with the slick, lewd sound of her fingers moving in and out of Tsukino's cunt.

"So," the doppelganger said slowly and sweetly, like she was savoring every word. "Is it everything you wanted?"

"N... nngghh..." Tsukino drooled. She was shaking her head from side to side.

"Let me guess." Shadow Tsukino overrode her effortlessly. "You didn't want this. You didn't mean to lose. You did your best. Is that what you're going to try and tell me?"

Tsukino struggled to nod. She'd given up trying to speak. Words were beyond her.

"It doesn't matter, you silly, naive little thing," Shadow Tsukino laughed. "What you say to me out loud doesn't matter at all. What matters is what's in your head. You know that you held back and hesitated. Or maybe you don't know. Maybe you're just wondering. Maybe you'll spend hours and hours replaying that moment in your head, over and over, trying to figure out if there was a tiny little part of your brain that betrayed you. That doubt will come creeping up your spine, Tsukino, whenever you finger yourself and whenever you most need to be strong."

"Nnnnooooooo!" Tsukino moaned. It was too much. Her thoughts felt like they were being boiled inside her skull. She'd already orgasmed, she'd thought, but the pleasure wouldn't stop.

Shadow Tsukino howled her mirth in response to Tsukino's screams of desperate pleasure. "I have to admit, I did tell just one little lie earlier. There is absolutely nothing altruistic about what I'm doing to you." She put her lips right by Tsukino's ear, and through all the bright stars and glowing crystals, Tsukino could see the doppelganger's grin becoming even more twisted. "It's just that seeing you all bright and perfect like that really, really pisses me off."

Tsukino could barely make sense of her words. She was just squirming and cumming all over the doppelganger's fingers. She didn't look like a hero or a magical girl anymore. She looked soiled. Ruined.

"You're much better this way," Shadow Tsukino exclaimed brightly. "I think I could toy with you like this forever! But I really can't. I need to let you go, so you can go out there and experience some real fun. Hmm... maybe there's a way I can come along for the ride." She tapped her feet musing. "Yes. Yes, I think so. It'll be perfect. You'll get to defeat the villain and save the day! At least, for now."

"W... w-wha... w-whu..." Tsukino babbled. She was still utterly overcome with pleasure. The shame of having been made so utterly, pathetically helpless burned between her legs even as her doppelganger removed her fingers.

"Don't worry about." Shadow Tsukino put one of her hands on each side of Tsukino's head and looked at her straight-ahead. Tsukino could feel just how wet and sticky one of those hands was. "Now, open up!"

Tsukino was completely and totally unprepared for the way her doppelganger surged forwards and kissed her.

The kiss was hungry, and swept the magical girl into its embrace before she could stiffen herself or resist. Shadow Tsukino's fiendish, snake-like tongue was in her mouth in her instant, and then her throat, pouring into her like liquid shadow. The incestuous pleasure of her shadow self's lips against hers made Tsukino twitch anew, but her eyes widened in alarm when she realized that the doppelganger was, quite literally, melting into her. Shadow Tsukino's form dissolved into wisps of fog, like she had never existed.

But instead of drifting away into the strange cave's stagnant air, every part of her was trying desperately to invade Tsukino's body.

The glimmering shadow poured down her throat and her nose, into her ears, and even through her eyes. Tsukino choked and wretched on the unfathomable substance as it invaded her, clawing at the air itself to try and seize it, but it was no use. It slipped through her grasp like it was nothing, and then became as slippery as oil as it violated her body. The worst part, though, was that the pleasure of the kiss didn't fade. Shadow Tsukino's lips were the last part of the demon to vanish, leaving only the sound of her fading laughter as proof she had ever existed.

Tsukino could still feel her, though. She could feel the doppelganger's presence within her, burning and itching under her skin. She could sense its wicked, lustful thoughts simmering at the back of her mind, ready to fill her with fantasies and urges whenever she least needed them.

She was possessed. Infected.

Tsukino needed to get out of here, she decided. She needed to tell someone. She picked a direction and ran. It was so much easier to think without the doppelganger taunting her. She could get out and alert her allies. Maybe they could fix her. Maybe they could-

Daylight.

Abruptly, Tsukino found herself stepping out into the light of dawn. The dark above her head had been cleaved open, and the cave around her was shattering into nothingness. Tsukino blinked. What was going on? Had she-

Oh. Of course. She'd won.

Unfamiliar memories pushed their way to the forefront of her mind. Tsukino had gone into the cave, fought a monster, and won. Just like always. It was as simple as that.

So, why did it feel so wrong?

Tsukino looked down at herself. She was in a terrible state. Her magical girl outfit was soiled and crumpled, her body was burning with heat, and her cheek and thighs were slick with some kind of strange, sticky substance that smelled of sex.

Tsukino frowned. It must have been an ugly battle. More and more, she seemed to remember it that way. The newly-forming memories didn't sit right in her head, but she was struggling to figure out why she should be questioning them.

Soon, her attention turned to something more pressing: she was feeling really, really pent up.

It was time to go home, Tsukino decided. Clearly, she'd been fighting all night. It was time to go home and rest - and perhaps take some personal time to blow off some steam.

The magical girl started walking, completely oblivious to the strange, purple, glowing rings around her eyes.

She would go home, jerk off, and be back on patrol in no time.

Tsukino squeezed her legs together. Deep in her heart, she knew exactly what was going to happen the next time she ran into a monster.

She was going to lose.