//Tags: happy ending, succubus, lewd, nerdy, cuddling, virgin, SCIENCE!, mild yandere, short story, modern day setting
 
Inverse
 
You hear a knock on your front door. A knock during a full moon; you already know this isn’t going to end well. The house is battened down, and the blackout curtains drawn. You even have most of the lights out, just for good measure. Usually they aren't so bold as to try the front door.
 
You creep over to the door as quietly as you can and look out the peephole. There is some kind of succubus out there with an absentminded look on her freckled face. She is wearing a tight sweater and plastic framed glasses. She has her hair pulled back into a simple pony tail. She looks like... well, like a huge dork. You expected a full mooner to dress a little more lasciviously, but what really catches your eye is what she is holding.
 
Radio gear. A lot of it. She has a gigantic yagi antenna in one hand, and what looks like an oscilloscope in the other hand. A rat's nest of multi colored wires runs from these into a backpack she is wearing, presumably holding the power supply and more radio gear. You can even see a giant omnidirectional antenna sticking out the top of the bag.
 
//this is what a handheld yagi antenna looks like.
https://i.imgur.com/qEi6KEX.jpg
//and here is an oscilloscope
http://i.imgur.com/HOKHay9.jpg
 
You are a cold blooded veteran of many a full moon, and this is a new one even to you. You’ve seen whorish outfits, charming girl-next-door attire, the whole “my car broke down and I need to use your phone” routine, and once even full-blown military fatigues and combat harness from a particularly viscous ogre. Never radio gear.
 
She waves the yagi back and fourth pointed at your front door ever so slowly, occasionally hitting a button on her oscilloscope. “Open up, I know you're in there.” She says to the door without looking up from her instruments. Something is beginning to dawn on you. You shift your body to the right with your eye still pressed to the peephole. The succubus frowns, then moves the antenna to the right, so its pointed right at your torso again. You step to the left, and she adjusts until its back on you once more. What the fuck?! What kind of weird man-finder gear is this? That machine can see you right through the door somehow. It was hard enough to hide even before someone invented this bullshit.
 
“Get out of here or I will call the cops!” You threaten back. Maybe you can scare her off.
 
She smirks at this. “On a full moon? Good luck with that one buddy.” She mumbles to herself. “Look, just... just open the door!” She says awkwardly. “You'll like this, I promise. I'll explain everything.”
 
Now this you have heard before. A monster will say god damn near anything to get a man. If you had a nickel for every “soulmate” or “long lost half sister” who showed up on your door you would be rich by now. You once looked up your address on Yelper (The proactive dating website!) to figure out what was going on. You scored a solid 8.3 out of 10. “Handsome with high endurance, but a bit of a fighter.” one comment said. “He absolutely looooved my webbing.” another one said. You were very clear with that fucking spider that you in fact, did NOT enjoy her webbing. Some people just can't take a hint.
 
“Open the door or I'll... or I’ll burn this MOTHERFUCKER DOWN!” She shouts awkwardly at the top of her lungs as her wings flare out to their full extension. She fumbles a book of matches out of her pocket. This bitch has some serious nerdrage going on. You keep the door shut anyway. She stands there for a few seconds, then lights one of the matches, calling your bluff. She begins moving it toward the bottom of the door.
 
“Okay, okay! You win!” You say as you unchain and unbolt the door. Getting raped isn’t all that unpleasant, and it sure beats having your house burnt down. She immediately moves past you into your living room.
 
She is pointing the antenna at you again as she studies the oscilloscope. She points the antenna away from you, then right back at you. She seems to be nodding to herself. “What is all that stuff?” You ask her.
 
“Uhhhh, yes. You see, everyone has their own unique kind of energy. Like a fingerprint.” She answers indirectly. She is finally looking at you now, and not the machine. “Monsters have demonic energy, men have spirit energy. Now, what makes you special, uhhhh, relative to me anyway, is you are my exact inverse. My opposite. I am, ummm, the yin to your yang.” She stares at you for a second, pushing her glasses back up her blue nose. Seeing the uncomprehending look on your face, she continues.
 
“This machine can pick up your spiritual energy emissions. Here, look.” She points the antenna at you again and holds the oscilloscope out so you can both see the display. “See there? That’s you.” The readout shows a spiky oscillating wave, full of complex peaks and valleys. You are staring at the analogue equivalent of your own soul. “Okay, now keep that pattern in mind, and then look at mine.” She points the antenna at herself. The pattern has reversed itself. For every one of your peaks she has an equivalent valley, and for every valley she has a peak.
 
“I made it. I made the whole thing, just to find you. Took forever. A couple years, if you count the theory behind it. I triangulated your position several days ago, but I uhhhh, wasn’t feeling, ummm, brave enough until tonight. Nothing like a full moon to work up a little courage, you know?”
 
You are pretty sure you know where this is going. “So you're, what, my... soulmate?” You ask her, trying to clarify the situation.
 
She frowns a little. “I hate that word. Yes, it is appropriate though. Nothing in nature is perfect of course, but uhhhh... lets just say you would be very difficult to replace. One-in-a-million. Actually closer to 1 in 4.8 million, statistically speaking. The closest match in town. You are unlikely to ever find a better match than me, let me put it to you that way.” The succubus explains.
 
“No way, I mean, no offense, but you're a succubus! I would never, you know, not with you!” You say, trying to diffuse the situation. You failed, miserably, because that sentence only fired her up more.
 
“God damn you.” She says coldly, looking right into your eyes. “My whole life its been like this. I’ve seen the comments on the internet: “Succubi are sluts!” “Succubi are unfaithful!” “Succubi are cruel!” “Succubi are shit!”” She makes little air quotes with her fingers as she talks, her tail whipping back and fourth as her anger increases. “MEN are shit! How about that? Hows that feel? We are the most common monster race, and none of you want us. The few men that do like succubi are outnumbered 10 to 1. Do you have any idea what its like for someone like me? Someone who is, uhhh, a little less outgoing? I’ve always been lonely. Always.” She looks like she is about to cry.
 
“But not any more. YOU will love me. I have proof!” She points frantically at her oscilloscope like a madwoman. Her face has transformed into the very picture of frenzied determination. You take a step back as you break out in a cold sweat. This chick seems mighty unbalanced. “Its all right there, in the data. You'll see.” She pauses for a second, then walks over to you, dropping her gear on the floor. She grabs you by the shirt collar.
 
She just holds you there, unmoving. Like she doesn’t know what to do next. You wonder if she has ever done anything like this before. After staring at you for several seconds in an awkward, wild eyed panic, she leans in and gives you a quick kiss on the lips before pulling away.
 
You INSTANTLY feel what she is talking about. It feels like fireworks are going off inside your head. Your eyes go half lidded. Your legs go weak from pleasure and your whole body relaxes into hers. Your cock swells into a raging hard on. You have been with monsters before, but it has never been like this. You think its safe to say her math checks out with that energy shit or whatever. It's getting hard to think clearly. Who cares, you just want more.
 
It looks like that kiss had a similar effect on her. You grab her head and use her horns like handles to pull her back into another kiss. She seems very surprised at your sudden aggression. She lets out a little “Oomp!” As you pull her close. Your hands slide down to her chest and begin groping her tits. Her firm, perfect tits. Mmmmmm. That weird chemistry the two of you have just keeps increasing.
 
Before you know it you have picked her up and are princess carrying her upstairs to your bedroom. She makes an surprised, excited noise at her sudden change in orientation but doesn’t protest. She looks like the happiest girl alive. She is beaming up at you as she wraps her arms around the back of your neck.
 
You lay her down on the bed and begin stripping off her clothes. She seems stunned at first, but rapidly adapts and begins removing yours as well. Part of you wonders if this is all going too fast for her, but another part of you doesn't care. You are pretty sure she was a kissless virgin before she met you, based on that speech she gave and her response to all of this so far.
 
You spread her legs and thrust into her in one quick motion. You can feel her hymen pop and she cries out in pain. That answers that question. You interlock your fingers with hers. “Wrap your wings around me.” You tell her. She does so, cocooning the two of you together in your own private love nest.
 
You work yourself through her gently. You want her first time to be sweet and romantic, not some exercise in savage brutality. She moans sweetly and rocks herself against you. You kiss her from time to time, gazing deeply into her eyes. Finally she begins to cum, jerking and twitching erratically as she loses all motor control. Her cunt clamps down on you hard, milking you in waves. Her wings clamp down too, pulling you into her as deeply as she can.
 
This pushes you past your limit and you fire off into her depths. Thick pearly ropes of seed rocket into her womb and your vision completely whites out. Her wings are pulling you in as tight as she can make them, and she makes encouraging cooing sounds to you.
 
She looks like she is on cloud nine. You lay on her with your head nestled between her breasts, both of you panting. Neither of you say anything, just making contented animal noises. Every so often her wings squeeze and ripple around you. Her arms hug you close lovingly. You fall asleep in each others warm embrace, letting the afterglow wash over you.
 
--------------------------------------------------
 
You wake up the next morning to find her stroking your hair. She playfully trails the tip of her tail across your lower body and legs. “Morning, sunshine.” She says to you, in a dreamy, half sleepy way. She is still beaming that radiant smile.
 
“Morning.” You say back as you pull her against you in a spooning position, making her the little spoon. You feel like cuddling for a while. She struggles for a moment as she attempts to readjust her wings and tail, then pokes her tail out from in between your legs and goes back to trailing it against you.
 
You think about her. This weird little creature that came out of nowhere. She struggled for years to build that machine, just so she could find some perfect stranger and tip his life upside down. Your soulmate. There is no doubting that fact after last night. She is the one.
 
“Last night was really something huh?” You say to her.
 
She says “Mmmmm yep, like I told you, we have chemistry. I was very careful with the math.” She pauses for a moment, then her whole body goes tense. “Unless you mean about how I, uhhh, tried to burn your house down. I’m really sorry about that. I ummmmm, don’t usually do that sort of thing. It's just... it's just I had come so far and you were the last real obstacle in my path to success and I knew I only had to touch you once to convince you and-”
 
You interrupt her verbal incontinence with a reassuring squeeze. “Hey, hey its okay. I understand now. You were right, I felt it as soon as you kissed me. You're the one. You always were.”
 
She relaxes back into you. “I thought you might be mad. Hey, do you mind if we just snuggle here for a while? This is really nice, and I’ve never done this before.
 
“We can spend the whole day together if you want.” You tell her. She doesn't say anything, just coos softly as she pushes her back tighter against you and wraps her tail around your leg.
 
You are both quiet for a long time. “Was it worth it?” You finally ask. “Building the machine? Just to meet me?”
 
“Absolutely.” She says back. “Best night of my life, hands down not even close. Plus, we will be filthy rich now.”
 
“What do you mean?” You ask her. She goes tense again.
 
“I mean, uhhh, I will be rich. But ummmm, you can, you know, be my boyfriend, or whatever. I mean, ummmm, sometimes people share assets, like a joint account when, you know. Not that I’m saying we should get married or anything! We just met! Of course that would-”
 
“I know what you meant by “we,” what do you mean by rich?” You ask, trying to derail her latest runaway insecurity train.
 
“Well, haven’t you considered the commercial applications of all this? It doesn’t just work on me and you, you know. Everyone emits that energy. You just have to re-tune it to a specific person, then find their inverse via triangulation. Everyone is going to want this. All men, all monsters, everybody. I think we all feel, you know, a little lonely sometimes.”
 
"Now that I have, uhhh, conclusive proof that it works (she pokes you in the ribs) all I have to do is make it a little more dummy-proof, slap a patent on this bitch, and cash in hardcore. So much money, like, you don't even know. If you and I are any indication, we are going to make a lot of happy couples.”
 
You start laughing as this information sinks in. It starts out as a soft chuckle, but before you know it you are roaring out big peals of hearty laughter as you rock her back and fourth. You found your soulmate (or she found you, anyway) and won the proverbial lottery on the same day. She starts laughing too. You both chuckle at the sheer absurdity of your good fortune. After the laughter dies down you both get quiet again for a long time. You simply revel in each others warmth as you cuddle.
 
After a while you say “You know, I’m surprised you didn’t use any magic. Most of the succubi I’ve met, its all magic all the time. Its like their first order of business.”
 
She thinks about this for a bit. “Yeah, I’m not really all that good at magic. I'd probably just, I dunno, accidentally fry your brain or something.” A huge, smug grin creeps across her face, and you can hear the mirth in her voice. “Besides, I don't even need magic.”
 
“I've got science.”
 
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