Invasion of Aliens (Pixiv Fanbox)

　A corner of Japan where rice paddies and fields dot the town. It is not a place where incidents usually occur, and one day, a meteorite struck the mountain behind Kise High School in this rural area.

　Fortunately, neither the high school building nor the surrounding houses were damaged, but from that day on, the media and people who wanted to create a buzz on social networking services all rushed to the area, and for a while, the area was noisy.

　Now, a month or so later, people have finally calmed down. Although researchers from famous universities and other organizations were supposed to have come to investigate the meteorite, the results of their detailed analysis of the meteorite were never revealed, and the mass media have stopped reporting on the meteorite. The residents of the town, who had been excited about revitalizing the town, were also downhearted for a while, but that was only for a short while, and now life has completely returned to normal. The same was true for the students and faculty of Kise High School.

＊＊＊

“I'm not sure if I should have a set meal today, or just go for the ramen noodles. But……”

　Koichi Murata, a P.E. teacher at Kise High School, pushed open the front door of the school building and stepped outside and folded his arms and pondered for a moment what he would eat for dinner, then patted his belly, which protruded just a little.

　He was a former rugby player and was twenty-seven years old. His well-trained body was covered with thick muscles, and his skin was firm and youthful. He looks healthy when he is fully clothed, but a few days ago, he was told that his cholesterol level was high during a medical checkup. Although it was not yet at a level that would cause him much concern, he had decided to be more careful about what he ate. But he had just eaten a large bowl of katsudon (pork cutlet served on top of a bowl of rice) during his lunch break.

“I'll make you some stir-fried vegetables to eat……”

　He let out the words wistfully and turned his feet in the direction of the parking lot. It was nearly pitch black today because the moon was hidden by clouds, but there was a streetlight near the parking lot. Relying on the light, he was about to take the car keys out of his pocket when he heard a voice saying.

“What……?”

　Suddenly, he thought he heard something. Koichi's ears twitched and he looked around. But there was nothing unusual. He thought it was his imagination and turned to the car again, but this time he heard it clearly. It sounded like a man moaning. He rushed toward the school building. He looked around, but there was no one lying on the ground and no suspicious shadows moving about. But he can definitely hear the moaning.

“From where……?”

　He wondered, and as he turned his feet toward the schoolyard, he heard the voice again. This time, he could hear it more clearly. It was coming from the area where the athletic clubs were located. As he ran into the club building, he noticed a faint light leaking from the baseball club room at the far end.

“Is someone…… in there?”

　Koichi swallowed his spit and gently put his hand on the doorknob. Twisting it slowly, the door opened easily with a squeak. The doorway was filled with a masculine air that poked at the back of his nose, as if the smell of young men's sweat had condensed in it.

“Is there anyone there……?!”

　He asked again out loud, but still there was no answer. There was only a faint moaning sound. Koichi looked into the room, suspiciously, and gasped.

“What the hell is this……?”

　The place was an inferno. The floor and walls were splattered with a white liquid and filled with a peculiar foul smell. It was the smell of cum and sweat. And in the middle of it all was a naked baseball player who was being slurped up into a pitch-black human-shaped object.

“Oh, no, stop it! Oh, Sensei, help me……!”

　The nude member of the baseball team pleaded in pain for help, but the black object refused to listen to him, and swallowed him without mercy.

“No way……”

　Koichi sat up on the spot. Shivering, he backed up, but he was up against the wall and couldn't move any further. The reason that barely remained in the corner of his head cursed him for being 'pathetic', but he still couldn't overcome his fear.

“Save me……, oh, ohhh……!”

　The club member's voice turned into a muffled one, and his entire body swallowed up by the black object. What was left was a black mass with a shiny surface. Its size is about the same as that of the baseball player who was absorbed. The black mass wriggled several times and eventually began to change the color of its surface. It turned a skin tone──, a tanned skin tone at that.

　As the object finishes changing color, its shape next approaches that of the baseball player who has just been absorbed. A mature, chiseled, square face for a high school student. His shoulders are broad and his chest is strong, with muscles more developed than those of a grown man through rigorous training. His waist and big buttocks were toned yet richly muscled, and the cock hanging from between his legs instantly warped from its flaccid state.

“Huh…… Nm, hmm～. A-I-U-E-O. The name of the owner of this body is…… No, my name is Daichi Miyanaga, the captain of the baseball team. I'm a catcher and the cleanup hitter…… What's a catcher? Hmmm…… I see. Uh-oh! Hehe, it's all right. I'm perfect now.”

　Koichi couldn't help but be puzzled. Earlier, his face was so distorted with pain that Koichi had no idea who it was, but he recognized the man smiling in front of him. It was Daichi Miyanaga, the captain of the baseball team.

　While putting all his energy into his club activities, he also never neglects his studies. Thanks to that, his grades are always in the top class. His impeccable character is serious, honest, and humane, and he is trusted and liked by his classmates.

“Mi, Miyanaga. Are you all right? I felt like your body was swallowed by some kind of weird black mass, but I must be mistaken……, right?”

　Koichi called out to him. Daichi looked at him with a stunned expression for a moment, then immediately broke into a broad smile and started laughing hysterically.

“Hahahaha! What are you talking about, Koichi? A black mass? There is no such thing here, and I won't be swallowed up by it.”

“……That's right, hahaha.”

“You're working too hard, Koichi. You should take a break. Give us your cool body forever……”

　Not good……! Koichi was about to head for the clubroom entrance when the fearless-looking Daichi's mouth hung open, but he was easily pinned down by a figure that suddenly appeared.

“Hey, hey, Koichi. You can't leave here. Your sexy body is quite popular among us, you know. We were always arguing over who was going to be the owner of your body. Hey……, guys?”

“Hiroshi……?! And you guys are……!”

　Appearing from the darkness were Koichi's colleague, Hiroshi Goda, a P.E. teacher, and a group of particularly beefy boys who belonged to the sports clubs. They surrounded Koichi with grins and smiles on their faces, still in their dirty uniforms, even though club time was long over.

“Hey…… what does this mean, Hiroshi? What is wrong with these guys? And you, too……”

　Koichi, who could not catch up with the sudden understanding, looked around anxiously and gave them a clinging look, but all of them only giggled and laughed at him. Koichi felt dizzy. All of them, for all intents and purposes, looked human, yet their smiles were so inhuman.

“Koichi, I'll tell you why.”

　Hiroshi, who was holding Koichi immobile, gripped Koichi's crotch tightly. Then he tells Koichi to whisper in his ear.

“All of us here are not people. A while ago, a meteorite hit the mountain behind this school, right? We are the aliens that landed on this earth at that time, and one by one, we have taken over the bodies of the people here. Just like you saw earlier, we changed the shape of our bodies into a very thin membrane and absorbed into our own bodies those we wanted to take over.”

　Dragging Koichi to the front of the appearance mirror in the clubroom, Hiroshi's body and face contort limply, and in no time at all, he becomes exactly like Koichi. In an instant, his body, which weighed over 100 kilograms as the judo club's advisor, is transformed into that of like a rugby player.

　Not only is his body muscular, but he also has the same hairiness and even the same old scars on his skin. In addition, not only his hair, but even his face is eerily similar to Koichi's.

　In the mirror are two men who look like twins. The thickness of their eyebrows, the size of their eyes, the bridge of their noses, even the shape of their earlobes are exactly the same, and even the thickness of the flaccid cock hanging between their legs is indistinguishable. In addition, even the two bodies odor wafting through the air is identical.

“Oh, I'm right in front of me……? Is this a dream? There's no way that's possible……”

　Koichi tried to move away from Hiroshi, but his body was still held by firm arms, and he could only wiggle his legs on the spot like a captured crab. He did not know why, but he thought that now that his body was the same, if he wanted to escape, he would be able to do so.

　Yet, he could not escape from Hiroshi's arms. Perhaps it was fear that his fellow teacher's body had been transformed to look exactly like his own, or perhaps it was the indescribable sense of intimidation he felt from Hiroshi, but Koichi was like a frog staring at a snake, unable to move.

“Hahaha, don't be so scared! Our species is good at mimicking others, but we can only mimic them in appearance and voice. What do you think? I look and sound just like you, don't I? I'm Koichi Murata, a perverted high school teacher who loves to have my ass fucked by a man's cock…… Gahahahaha!”

　It is the same voice as his own, coming from behind. However, in time with the vulgarity of Hiroshi's voice, a warm breath blows against Koichi's neck. A moment after Koichi feels a shiver go down his spine at the sensation, his lips are pushed open and a tongue covered in saliva enters his mouth.

“Mmmm, mmmm!”

　He rushed to close his mouth, but his jaws were firmly restrained. The feeling of the tip of his tongue tracing over his gums caused him discomfort at first, but it gradually turned into pleasure.

“Ooops…… Hmm……, mwah♥♥”

　Koichi's arms, which had been straining to resist, relaxed, and he began to clasp his own arms around Hiroshi's thick arms. Then, between his legs, his flaccid cock began to grow.

“Ahhh! Phew……”

　Koichi let out a sad, wistful sound as he was released from the kiss that had been going on for at least a minute. His tongue protrudes lazily from the edge of his mouth, and saliva strings towards the ground. Grinning at his face, Hiroshi began to strip Koichi of his clothes.

“Hey, Koichi…… Your nipples have been erect since a while ago, haven't they? How can you be a P.E. teacher if you're such a closet pervert? You look like you're looking forward to what's about to happen. Hehehe, well, it's all because of our abilities. And then──”

“Nmm! Aaah! Oh, oh, oh♥♥♥”

　Suddenly, Koichi felt a foreign object being inserted into his ass, and he let out a pitiful cry. In the mirror, he sees Hiroshi inserting a finger into his own anus. So why is Koichi moaning from his mouth?

“Ohhhhhhh～…… Hehe, does it feel good to you too? I don't have to ask, since I'm feeling so good. We've been able to share what we're thinking and feeling with each other because of our mucous membrane-to-mucous membrane contact. That's what I mean……”

　Hiroshi continued to move his fingers in a gritty, circular motion. Koichi wiggled his hips and writhed every time he felt the rough finger wriggling inside his asshole.

“Aaahhh…… stop it! Aaahhhh♥♥”

“What are you talking about, Koichi, the fun is just beginning. Now I'm going to put my cock inside your nasty hole.”

　Hiroshi pulled his finger out of his own asshole and placed his erect and veiny cock against Koichi's quivering anus. The tip of his cock, wet with his pre-cum, touched Koichi's anus, which trembled. Koichi let out an involuntary sigh at the first taste of heat. A shiver ran down his spine at the sensation of the thick glans pushing his anus open.

“Oh……♥ Oh, stop! I don't want a cock in my ass……, AHHHH♥♥”

　With an obscene sound, a hot lump of flesh invades Koichi's asshole. He has only ever used his asshole for taking a shit, but it is sucking on the thick meat stick with the vigor of a beast in front of his favorite food.

“OHHHH♥♥ Big cock in my ass♥♥♥ What happened to my cock……, my cock is hot too♥♥♥”

　Koichi rolled his eyes and stuck out his tongue. The heat and pressure of the trunk of flesh invading his asshole, pushing it to its limits. At the same time, even Hiroshi's euphoric feeling of his cock being tightened against Koichi's raw, warm intestinal walls hits him. Koichi is on the verge of his limit. But Hiroshi pushes his stiffening cock against the wall of Koichi's rectum as hard as he can, gurgling and knocking hard even against Koichi's prostate.

“As you can see, we have the same body now, and my cock and your asshole are very compatible with each other. Oh～, this is great. How does that feel? Doesn't it feel good?”

　Hiroshi said in a relaxed voice, but did not stop shaking his hips. Koichi screamed in a miserable voice and squeezed his anus in time with the movement.

“Aheee♥♥ I'm going crazy……♥ Please stop♥♥ Please♥”

　Koichi was so pleasured that he couldn't even speak, and he pleaded with tears streaming down his face. Hiroshi, however, is not concerned about it, and slams his hips down even harder. Koichi's buttocks collided with Hiroshi's crotch and made a dry sound.

“Oh, oh, oh?! I'm gonna cum!! Cumming♥♥♥”

“Hah♥ I can feel your emotions. I'm going to cum too! Koichi…… Ohhhh♥♥♥”

　Koichi let out a charming cry, his face contorted pitifully, which had been praised by the girls in the school for being manly like a P.E. teacher, as he took his cue from Hiroshi's hot cum inside him. His legs were stretched out and a thick stream of cum spurted from the tip of his swollen glans. Once, twice, three times……

　The more he ejaculated, the more pleasure chemicals kept being secreted in his head. Koichi's and Hiroshi's. The dopamine from the two of them is a wild rush in Koichi's brain, and it easily fascinates his well-trained body with a comfort that is unmatched by any masturbation or sex he has ever had with women. The pleasure of having his cock and ass fucked at the same time makes Koichi's lust begin to rise again, even though he has just ejaculated.

　After seeding Koichi's rectum generously, Hiroshi's hips quivered with satisfaction. When he slowly withdrew his cock, a thick stream of boiled cum poured out of Koichi's gaping anus. Koichi let out a silly 'oh-ho-ho♥♥' and collapsed back onto Hiroshi.

“Hmm? Are you finished, Koichi? Well, it's time we took over your body.”

　With a flick of Hiroshi's index finger, a dark mass jumped up around Koichi's muscular shoulders and covered him. It then proceeded to coat his entire body. A thin film spread over his thick trunk-like arms and legs, covering his craggy fingertips, invading his sperm-filled ball sack and still-erect cock, and then sizzling its way into his now fully expanded asshole. Koichi's internal organs were violated. The narrow urethra is forcefully widened, and the foreign substance enters Koichi's body in abundance, turning every inch of his body black──.

＊

“Ngggg……♥ Ohhhhh♥♥♥”

　Koichi gasped in ecstasy, his body tense with the sensation of the unknown foreign body stirring inside his body. The feeling of having his entire body attacked from the inside and outside, and having his body taken over by caresses, was strangely pleasurable to him, and imprinted an indescribable feeling of pleasure in his brain.

　At last, when the black film covered his neck and allowed entry into his drooling mouth, he had bowlegs and arched his back. He then ejaculates again and again into the thin condom-like membrane that encases his cock.

“Nnnnnn! Nnnnnnnn!!!”

　He felt something rising up through his nostrils and enveloping his brain. He felt no discomfort at all. With the gentle yet powerful embrace, Koichi finally handed over the control of his body to this 【something】.

“Woah……! Haha～, I finally took over a human body♥”

　The voice in which he declares so while raising his arms high in the air is, of course, not a bit different from Koichi's. The black membrane that covered his entire body just a moment ago has completely mimicked his skin, and here is 【Koichi Murata】, not a millimeter different from before. When he smiled with happiness, the mouth of 【him】 under the membrane also naturally twisted into the shape of a smile.

“Nmm♥ Ohhhh～♥♥”

　【Koichi】, who had taken over the body of a human being, stood there with his legs spread, intoxicated by the pleasure that ran through his whole body. His cock swelled up by itself, and the harder it got, the stronger the waves of pleasure became.

“Huhhh……, this is the best! This is the human body, huh? Hehe! I never knew a cock could feel so good, Aniki（big brother）! I'm a teacher, and I'm in a position to teach kids, but to ejaculate lustfully on my own body is a perversion that turns me on to no end.

　Laughing, Koichi wrapped his hands around his cock and began to roughly stimulate it, squeezing and squeezing it. He had just taken over the body of a human being, and he smiled carefreely at Hiroshi as he spread his piss all over him, along with his pre-cum.

“Oh, Nooo♥♥ I was one of the best warriors in my mother planet, and I'm going to fuck my genitals in such a vulgar outfit…… It feels so goood♥♥ I can't stop cumming～♥♥”

　It was like a monkey just learning to masturbate. Koichi opened his big thighs, rocked his hips back and forth, and rubbed his cock up and down, spreading the endless flow of his pre-cum with the palm of his hand.

“Oh, I'm cumming! I'm cumming! Ohhhhhh……, that feels so good♥♥”

　He ended up with a wild and charming voice, and hugged Hiroshi with sticky threads dripping from his still erect cock. Koichi's cock, still hard and warped, bumped vigorously against Hiroshi's cock, splashing clear juices. They rubbed their rods together for a while, the same size and the same heat, without exchanging a word. Human body that had just taken over. The sensitivity was so great that even the mere touch of their cocks made Koichi scream vulgarly and wiggle his hips in pleasure.

“Oh, my God, that's great…… I don't think I can live without cock anymore. ……Hey Aniki, put your cock in my ass one more time. I want to taste more of what it feels like to be fucked by a human cock!”

“Hehe, OK. But now you are already 【Koichi Murata】. And I'm your colleague, 【Hiroshi Goda】. In public, you should call me 'Hiroshi' instead of 'Aniki', right?”

　As Hiroshi frowned and said so in a reproving manner, Koichi's shoulders slumped as if in remorse, and then he began to probe into every nook and cranny of 【Koichi Murata】's brain. Twenty-seven years of one man's life. All of it unfolded in his brain as if he were watching a movie. Memories of his first love in childhood and the sensation he had when he first masturbated in junior high school. The first time he had sex in high school, the first time he spent his life as a ronin after failing the university entrance exam, the first time he became a teacher, and the faces and names of the students in his first class──.

　He was indeed an excellent warrior. He absorbed all of it at a tremendous speed, and his mouth was smiling with the joy of his new knowledge, and his cock trembled with a shudder.

“……It's all right, Hiroshi. Now that I have completed my learning about this body without delay, I think I can act like a P.E. teacher from now on. So……, please thrust your hardened cock inside me♥♥♥”

　Saying that, Koichi opened his legs and pushed the flesh of his buttocks apart with both hands. The place where Hiroshi's rod had been just a moment ago was completely loosened up and turned into an organ to receive a man's cock.

　After licking his tongue, Hiroshi placed his cock there, where sticky intestinal juices were leaking out, and inserted it, deliberately rubbing the bumpy walls of the flesh.

＊＊＊

　The date was about to change. Many men were gathered in the gymnasium of Kise High School, and their bodies were intertwined with each other.

“I'm going to cum♥ Cumming♥♥”

　One of the students was bouncing his body up and down, lying on the floor of the gymnasium on top of a big guy. He seems to have climaxed many times already, and his cock is limp with only clear liquid. But he still doesn't stop shaking his hips, and I guess he is completely addicted to sex. And the same could be said for the other people present.

　Inside the gymnasium, only the most physically gifted of Kise High School's teachers and students were gathered. All of them were completely naked. Not a few of them were so exhausted that they could hardly move, but still they continued to connect their bodies with each other in search of pleasure.

“Hmmmm♥ Yeahhh♥♥”

　With such a cry, another student climaxed and fell down on the spot with cum dripping from his cock. Then another student stands up and inserts his own cock into the other's ass, who still does not seem to be satisfied.

　When the students are done, it's time for the rest of the people to come in. Police officers, firefighters, construction laborer dads, sports instructors, and other men boasting of their muscles swarm around to fuck the overweight middle-aged teachers, as well as the P.E. teachers, who have become quite amorous in appearance. Such scenes have become a common sight at Kise High School.

“Aniki, make my ass feel even better with your cock like those guys do♥♥”

　Koichi, completely rutting, pressed down on Hiroshi's strong back as he and the others around him engaged in homoerotic sex. Perhaps because he had been having sex with other men every day since he had taken over human body, his cock was still hard and erect even though he had already ejaculated for who knows how many shots, and his pre-cum was dripping down from the tip of his cock like threads.

“How many times do I have to tell you? I told you to call me 'Hiroshi', not 'Aniki'……, oh, by the way now I'm 【Koichi Murata】.”

　Hiroshi scratched his head as if to say, 'Oh shit', and looked up at Koichi, who was smiling as he straddled Hiroshi. He seemed to have forgotten that a few days ago, for a change of pace, they had swapped the bodies of 【Hiroshi Goda】 and 【Koichi Murata】.

“Hehe, Aniki♥ Now I am not 【Koichi Murata】, but 【Hiroshi Goda】♥♥”

　Koichi smiled deliberately and rubbed his thick, sweat-soaked chest against Hiroshi's skin, then brought their lips together. After a thick, devouring kiss, the two men now extend their tongues into each other's mouths, as if they are exchanging saliva. Their resilient bodies touched each other and their chests pressed against each other. The feeling alone raised Koichi's arousal level to near the upper limit.

“Phew……♥ The human body is the best, after all. And every time I swap my body with someone else's body like this, I get a fresh sense of pleasure♥”

“And even though you have three children and such a big cock, your asshole is still gaping from being fucked by male cocks♥”

“Hey Koichi, that's mutual, isn't it? Once you learn the pleasure of having your ass fucked and cum shot out with a male's body, it's bound to become a habit for anyone! “In addition, I have a wife and kids, but getting fucked by a fellow teacher's cock is too immoral for me, and I'm crazy about man-on-man sex♥ So, come on, dig my slutty asshole of the father of children even harder, Koichi♥♥”

　Koichi got down on all fours and grabbed his buttocks with one hand and spread his asshole to make it easier for Hiroshi to insert his cock.

“You really like anal sex, don't you♥ I'm going to make your dirty asshole feel good with my fat cock, just like you wanted♥♥”

　The corners of his mouth twisted, and he grabbed Koichi's hips and shoved Hiroshi's huge cock all the way inside Koichi.

“Oooohhhh♥♥”

　With a beast-like roar, Koichi arched his body backward. His thick cock, lying flat on the floor, shot out a powerful stream of cum, staining the polished gymnasium floor with a white stain.

“Hey hey, did you cum again, Hiroshi? Do you know how many times you've cum already?”

“Huhhh, because, your cock feels so good♥♥”

“What a slutty P.E. teacher. But I'm going to do my best to make you feel even better♥”

　Hiroshi pulled his hips wide as he said so and slammed his crotch vigorously into Koichi's ass.

“AHEEEE～～♥♥♥”

　The scream-like gasps of the strong man echoed through the spacious gymnasium in the middle of the night. However, no one pays attention to his voice. Because everyone is thinking only of making themselves feel good.

　On their home planet, the aliens spent all their time fighting. Those once mighty warriors have now taken over the bodies of earthlings with cocks and assholes in their peaceful lands, and have turned into infatuations with men, lecherous warriors── or rather, just plain gay. Having taken over the bodies of large, sturdy males among humans, they now find their only purpose in life to have homoerotic sex every day with other similarly sturdy men.

“Oh, I can't stand it♥♥ Some more cock. I want some more cock♥”

“Me too. I want more cock in my ass♥♥”

“I'm cumming♥ I'm gonna cum♥♥♥”

　As the wild and charming cries of the males can be heard from all around, one man's cock sprayed a thick and heavy cum as if it had been stored for days, filling the gymnasium with male smell. The scent aroused the strong males around them even more. And they began to masturbate, or to get close to a nearby man and indulge in their pleasure.

(End)