Work Text:
Being the host to Blazar was a pretty weird experience. Sometimes Gento felt the same as normal, but other times he keenly felt the pressure of the vast and powerful thing hitching a ride on his body. He would have these random bouts of devouring hunger, or a hypersensitivity that left all his nerves tingling and raised goosebumps at the slightest brush of air. He was sleeping less, tossing and turning with restless insomnia, except he didn’t feel like he’d lost any sleep; like he’d just stopped needing as much. Jun had, at one point, caught him sleepwalking, and Gento had had to reassure him away from the rattling experience of watching Papa shuffle around like an unresponsive zombie in the middle of the night. Sometimes his ears rang, and weird spots swam in front of his eyes. He felt like a cup about to brim over, a puny vessel containing something enormous it could barely hold, practically bursting at the seams.
And he also had to deal with Blazar just sort of... looming. In his brain. Most of the time his being there was unnoticeable, and Gento was alone in his own skull; but sometimes he’d feel a presence push to the forefront, and a distinct sensation of standing in the shadow of something very large, and he’d know Blazar was right there behind his eyes looking out. Times like that he could also feel a mind pressing alongside his, a big alien stormcloud of incomprehensible thoughts and feelings, which was really disorienting, even when those thoughts and feelings gradually started to get more comprehensible with time. A lot of the time, Blazar was just curious—he was just looking. Which could be pretty inconvenient because he had no concept of privacy, and seemed fascinated with Gento’s bodily functions. It was a really weird feeling to feel that vast presence suddenly surface into your mind when you were defecating, or sneezing, or enjoying a beer, or masturbating; and to know that presence was watching you do it. Especially the masturbating part. Really awkward!
Because, uh... yeah, there was that too. His sex drive.
Specifically, a marked increase of it.
Look, he tried to keep it sensible, all right? Frantic masturbation twice a day only, in his car before and after work—but it was clear that something had changed, making him need that to begin with. He felt desire so much more powerfully, with a hunger to match the literal hunger Blazar kept instilling with him, and every time he came it was with a deep and powerful relief like he’d been pent up for months. And there had been a real noticeable increase in semen volume, too, which made cleanup a pain.
He tried not to let it show during sex with Satoko—not that they got to have it often, with a kid in the house. It wasn’t that it was bad for him to be more horny during sex with his wife, per se, but it kind of embarrassed him, and when she complimented him on his vitality it made him feel bad about the secret he was keeping from her.
“Uh, yeah,” he would say, “it’s just been, you know, stressful at work, and it’s good to have an outlet, right?” And then she got worried about how it had been stressful at work, and wanted to know details, so he had to pull evasive maneuvers, and feel even worse. He did want to tell her eventually—he felt bad keeping her in the dark like that—but there never seemed to be a right time, and after sex seemed like an especially bad time to tell her there was another guy living in his head.
Especially when Blazar would surface in Gento’s mind during the sex sometimes, watching with intent curiosity, while Gento frantically tried to kick him out of the headspace without seeming distracted. Ugh! So awkward! On one notable occasion he’d failed to not seem distracted, and gotten so intense about the mental shoving match trying to keep Blazar from the front that he’d gone soft midway through.
Awkward! So awkward! He’d apologized profusely to Satoko, gone down on her, and afterwards cuddled her for a bit while doing his level best to chastise Blazar for the whole mess. He always had a lot of trouble trying to convey specific concepts (such as “don’t sample the spices in the spice cabinet using my mouth”) but this time he didn’t need to—he was stewing in annoyance and disapproval, and it must have shone through loud and clear. Blazar reacted with sorrow and confusion; it was lamentable (he didn’t seem to have a concept of being sorry) that Gento’s pleasure bonding time with his special person had been hampered, but he didn’t understand what his own actions had to do with it. It’s supposed to be just the two of us, Gento thought loudly, JUST THE TWO OF US, and Blazar subsided, still confused; he didn’t get it, but the little creature he was residing in was clearly very distressed about it, so he would abide. Gento supposed, despairingly, that that was the best he would get.
It was in the midst of all this turbulent, uneasy atmosphere—at least inside Gento’s mind—that he and Satoko decided to clean out the storage closet to make more room for Jun’s things. This meant unpacking and digging out a lot of boxes that had been in there for years, and Gento was surprised even to discover a few boxes dating back to his old college dorm. Crazy, how that had just been packed away in here for so long. He squatted down and started unpacking them, pulling out various miscellaneous items—a desk fan, a handheld vacuum cleaner, a folded blanket, a—hmm? Some weird shape wrapped in a plastic bag? He picked it up, felt the contours, and...
Oh! Ah, he knew what that was now. Wow, nostalgic. Carefully, Gento hid the dildo in its plastic bag wrapping under a pile of his folded clothes in the drawer and kept sorting, but his mind kept coming back to it. Wild how it was all coming back now! He’d been young and horny, as these things often went, and he’d heard about the supposed male G-spot, and he’d indulged his curiosity, and—wow, they hadn’t been kidding, huh? And thus a new habit was born, explored, expanded, etc. But after the toy had gotten packed away he’d apparently never missed it enough to go looking, and even the habit of fingering himself had died away around the time he’d started going steady with Satoko. That was sexually frustrated bachelor behavior, after all, and he was a family man now.
...But he did keep thinking about it.
Ah, what the hell, he thought finally, with his newfound alien-induced sex drive buzzing in his ears, and waited until Satoko and Jun were out of the house, on a trip to the amusement park that he’d stayed home from. He had to furtively do some research about if dildos like, went bad or something, and then got to work. Blazar surfaced while he was first touching himself to get in the mood—it had become almost familiar and comfortable to have him there while jerking off, and wow Gento wasn’t going to examine that—but mercifully hung back in the background right up until Gento’s fingers moved to his anus.
“Yeah, that got your attention, huh," muttered Gento, while Blazar’s curiosity about human bodies intensified like a laser focus pinned directly on him. Great, so he had a real audience now. “Just don’t do anything crazy while I—nng—”
So maybe trying to take all of it at once when he was so out of practice was a bit difficult, but he eventually managed to get it in and that was what counted! And god, he’d forgotten how good it felt. Maybe his younger, hornier self had been onto something. Eventually Gento got tired of moving his wrist, so he moved off the bed, suctioned the end of the toy to the linoleum-wood floor, and lowered himself onto it, one hand behind him guiding it in. A moan slipped out of him as he bottomed out. Blazar watched with great interest, like the audience to a particularly exciting magic trick, as Gento moved himself up and down the toy, slowly at first, but with increasing intensity; and all the focus of that alien consciousness on that particular area made it so good. God!
It wasn’t long before he was fucking himself with almost embarrassing enthusiasm, and panting out regular moans that he was barely keeping quiet enough to not wake the neighbors. Blazar was all tangled up in his consciousness, relishing the sensation with fierce excitement that burned through Gento’s body, marveling at it too. How varied and versatile human bodies were, the thought made its muddy way to him—they were so limited and solid, and couldn’t even scale shift or remake themselves in different shapes, but they managed to do such creative things in that solidity!
“Yeah,” moaned Gento in response, only half registering; he had a lot to focus on right now. He found the right angle to come down on it to get that spot that felt just uncontrollably good, and Blazar signaled ravenous interest and approval. Gento felt a wave of affection come over him, making its way through the vigorous activity of riding. It was nice to get to show Blazar these things. It was nice to bond with the giant alien in his brain a little, and it was also really hot to feel Blazar respond, and roar silently in Gento’s mind, and sink his senses deeper into Gento’s flesh like biting for purchase, and—
The switch happened quite suddenly, and quite seamlessly; Gento barely registered that he’d been pushed to the back of his own mind for a moment, because Blazar was just continuing the same motions he’d been doing, fucking himself on the toy with enthusiasm. When he did register it, all he could do was marvel in shock, and hang on for dear life. Blazar was so into it, he’d taken over Gento’s body just to get to do it himself; and already his impatience was showing through, as he sped up, going faster and harder than the pace Gento had set.
It was indescribable. Gento’s own body was moving itself without any input, and the pleasure came in fierce waves that Gento had no control over—it was uncannily like getting mercilessly fucked, surrendering himself to Blazar’s eager quest for desire. Blazar was slamming their body down on the toy, bracing their hands on the ground to get better leverage, and practically roaring—there was no other word for the guttural moans of pleasure that were escaping from Gento’s mouth right now, stolen from his control. Between the physical pleasure of Blazar pounding the toy against his prostate, and the overwhelming feeling of being pressed up against Blazar’s thunderstorm consciousness as it lost itself to animal pleasure, it was all Gento could do to hang on, all thought being fucked out of what remained of his mind. This had to be the most erotic experience he’d had in his life.
When the two of them came, it was like a tidal wave slamming into them both. Blazar yelled, thighs tensing and flexing, and Gento was gone, submerged in the vicious ecstasy of climax that took Blazar and himself alike. He thought he probably lost consciousness for a moment; when he blinked awake Blazar had subsided, though not completely. They were sitting boneless on the toy together, each left with probably about equal control of the body right now, and equally too blissed-out to use it.
Blazar was radiating satisfaction. Gento felt like... Gento was... He was going to need a moment to process this.
Good god, there was cum all over the floor. Incredible distance.
His thighs were going to be killing him as soon as the lactic acid started setting in.
And all those noises. God, the neighbors—he could only hope all of them were away right now, or—
He was still twitching with aftershocks, and the toy inside him didn’t help; he’d never had an orgasm take so long to dissipate before. That had been incredible. Blazar purred smug agreement; his presence in Gento’s mind was like a warm heavy blanket, close and immediate and lazy, blending with the limp exhaustion of their shared body. The presence shifted, nudged closer, and...
Good god, Blazar was cuddling him. All snuggled up to him in their shared consciousness, practically purring with satisfiaction. Blazar was cuddling him like they’d just had sex, which—they’d—kind of had? Technically?
Oh no. Oh dear. He was getting post-coital cuddles from an alien that lived in his mind, and it felt amazing.
“I’m married," said Gento in dismay, to the empty room. Blazar did not give this information the weight it was due whatsoever.
***
So that was a really promising development, not; Gento tried his best to put it out of his mind after that. It wasn’t easy, because Blazar kept nudging him with interest, clearly wanting to know when they’d get to do that again, and when Gento told him no in no uncertain terms Blazar responded with bafflement. Why not, when it felt good and they both enjoyed it, and no smaller weaker creatures in need of protecting were harmed? Gento’s attempts to explain the concepts of marriage and infidelity and restraint were met with even more confusion, and through their nebulous link Gento got the impression that Blazar considered him a small and incomprehensible being concerned with small and incomprehensible matters, which sure was flattering, thanks. It was especially difficult for Gento to stand his ground when he kept remembering how good it had been, and how nice it would feel to slip into that beautiful feedback loop, himself and the strange and wild creature within his body melting into ecstasy together—anyway, he was masturbating to the memory a lot these days, and it didn’t help his case. What was he going to do?
He was starting to have wet dreams with Blazar in them, as well. They were strange and blurry and often just consisted of an impression of Blazar’s presence that would nonetheless still have him waking up with an erection. He thought it was just his reaction to this strange and unfortunate chemistry that had sprung up lately, and tried to—no, repressing it probably wouldn’t help. Instead he reminded himself that they were just dreams, he didn’t have to feel any particular sort of way about them, and that if he just stayed calm about it all they’d go away eventually.
But they didn’t, and then one night he had a dream that didn’t feel like a normal dream at all. It felt real and solid and present, and at the same time oddly blurry and unfocused; reality seemed to slide in and out of itself like a microscope focus. It was all layered double—Blazar was as massive as ever, a presence of mountainous size and weight and strength compared to Gento’s puny human frame, and yet Gento’s thighs easily bracketed his hips, the forms of their bodies matched to each other, as if someone had twisted a mobius strip into the entire concept of dimension and scale. And all that size and weight and strength had him pinned down and was driving into him with unbridled want and hunger, splitting him open and ravishing him completely, irresistibly.
It was unbearably wonderful. Gento had no concept of when the dream had begun, but he didn’t want it to stop. He was powerless underneath Blazar’s overwhelming might, but that was all right with him, because Blazar wouldn’t hurt him, Blazar would make sure to be good to him even as he rutted into Gento with indefatiguable strength. All he had to do was lie there and let Blazar use him to indulge his curiosity, because that was what it was, he was certain—Blazar had been watching all those times and now he wanted to try it, and he was using Gento’s mind and body and nerve endings for it like the hardware to run a simulation on, and Gento just lay back and let him, gasping and twitching and deliciously helpless beneath all that fierce hunter strength as Blazar took what he wanted.
It was incredibly sexy and also made him incredibly fond. “Go ahead,” he breathed, bringing up a hand to Blazar’s face, a dizzying mismatch of space and time, cradling the side of a mountain in his human palm. “It feels good, doesn’t it? I’m glad you’re enjoying me, take everything you want, I don’t mind—” and Blazar hunched forward against his torso and went even harder. Gento put his arms around him, impossibly, holding all that vast alien light and power in his arms, and he felt fond enough that tears sprang to his eyes, though maybe that was just the phenomenally good dicking he was getting right now. “Yes, anything you want,” he said deliriously, as Blazar grabbed his hips and just pulled him further onto it, oh, just moving Gento to where he wanted him like it was nothing, and held him in place there while he kept on pounding him so hard and fast the end must be near, “use my body to feel good, that’s it, you’ve earned it, you’re so good, you’re so wonderful, I love you—”
And then he and the two of them came so hard the world whited out, time and space dissolving into pure spine-bending ecstasy, and then he was gasping awake in his bed, shirt soaked with sweat and the aftershocks of orgasm still shuddering through him. Talk about disorienting. He lay there, getting his breath back. Satoko was asleep next to him, and he felt a deep pang of guilt looking at her sleeping form. There was nothing to do but to get up and take off his sweaty shirt and ruined underwear and change into new ones, and to this time fall back asleep. Blazar was apparently satisfied; there were no further dreams that night.
He was still disoriented when he went to work the next day, though; he kept replaying the memory, and popping a semi about it every time, too. No bones about it, that was a memory of some seriously good sex; the sensations stood out so much more vivid and real than any dream had a right to be. How the hell had Blazar managed it? And what the hell was he going to do?
It was while he was sitting at his desk, entertaining these worries when he should have been looking over the munitions inventory, that he felt a tingle of sensation caress up his inner thighs, and flinched violently.
“Captain, are you okay?” said Emi, looking over, and Gento stood up hastily. The sensation was continuing, stroking lazily over his crotch and ass under his clothes. Oh noooo, Blazar must have been nestled in his freaking nervous system—how the hell had he managed that one—
“Sorry, I’m not feeling too well,” said Gento, and fled the scene as the flares of stimulation began circling around his hole. Blazar evinced satisfied intrigue at seeing him run, as if he’d poked a bug to watch it scamper; and signified, as well, that he was enjoying the sensations as much as Gento, and how pleasant it felt to be nestled up together under the same blanket of pleasure. “You can’t,” gasped Gento, barging into an empty storeroom, but Blazar had always displayed an entirely selective understanding of human speech; the trail of sensation swandived directly inside his anus, filling him completely.
Five minutes of getting blissfully fucked by a disembodied presence and one earth-shattering orgasm later, Gento peeled his limp and sweaty form off the wall and tried to catch his breath. That had been over so fast—but how could it not be, when the two of them were merged together in an infinite feedback loop of pleasure? When Blazar felt sex so greedily, without shame or reservation, pulling Gento along in the wake of his intensity? His legs were jelly and the inside of his underwear was wet, and Blazar was psychically cuddling him again, so that Gento could almost feel the warm heavy weight of him draped over his back.
“Look,” he said desperately, and Blazar stirred in response, “you can’t just—I mean, it feels really amazing, and—but—look, I have a job and a wife, I can’t just do this all day, and—”
He knew he’d made a mistake by introducing the concept of do this all day into the shared mental headspace when Blazar brightened, shoved Gento’s refractory period aside like a curtain—seriously how was he doing that!—and started up a rhythm of sensation centered around Gento’s nipples and prostate, his mindscape full of the pure enjoyment and curiosity of getting to try out a shiny and versatile new toy that felt really good.
“What am I going to do,” moaned Gento, and let himself go limp against the wall again.