Sir, your body has been taken over!

"The clouds are getting thicker and thicker. The weather forecast these days is really unreliable…"

　Yusaku Koori, a high school physical education teacher and rugby club advisor, looked up at the dreary sky, let out a sigh, and frowned.

　Indeed, as he had blurted out, the sun, which had just a few moments ago been relentlessly shining on the ground, was now hidden by thick clouds. In addition, it was beginning to make a rumbling sound as if thunder was about to strike.

　The students of the athletic club, who had been shouting with energy and vigor, are no longer on the ground. They must have finished their club activities and hurried to the changing rooms. Yusaku was the only one left in the spacious room. A strange calmness surrounded him.

"……Whoa?!"

　Suddenly, a cold wind that stung the skin blew through the air, causing goose bumps to appear on Yusaku's thick arms. The next moment, there was a sharp flash of light that ran with a roar that tore through the sky.

　Yusaku's entire body felt a jolt as he involuntarily meditated from the dazzling flash of light.

"──Gaaaah!!!!"

　Convulsing violently, Yusaku dropped the ball in his hand and collapsed on the spot. He was struck by lightning. His whole body went numb and his consciousness faded away.

──Am I…… going to die…… ?

'Ah, ah~…… Nice to meet you, earthling…… I am Gamma. I am what you might call an alien being. I have come to this planet to study the ecology of Earthlings, especially the bodies of strong men like yourself.

(Huh?? ……What……?)

　Yusaku's consciousness sank into the deep darkness as he heard a mysterious voice echoing from the back of his own head.

＊＊＊

　A parasitic life form, Gamma. He was sent here to take over the bodies of earthlings.

　Before him, a life form named 【Alpha】 was sent to Earth. Such an Alpha, according to the report, has gone through daphnia, ants, caterpillars, rats, crows, cats, and dogs in the few days since he landed, and has acquired a human body in the fastest time. Moreover, it is rumored to be a wonderful body, young and full of physical strength.

　Gamma, too, was determined not to be outdone by his respected seniors, and it seems that a human being happened to be standing at the exact coordinates of their arrival point. And, as luck would have it, he was the strong man they were looking for.

　Gamma rejoiced at his greatest good fortune. Studying his physical body would allow him to get more deeply into the essence of the earthlings. He was eager to get up close and personal with Alpha, who had interacted with Earthlings before him.

'I see…… The name of the owner of this body is Yusaku Koori. He is thirty-four years old, single, a high school physical education teacher, and advisor of the rugby team. His face is stern, his body hair is thick enough to indicate a strong sexual appetite, and in addition, he is quite muscular compared to men of his age. He gets along well with his fellow teachers and has no complaints. The only problem is that because of his size and appearance, students call him 'Gorisen (Gorilla-sensei),' and female students distance themselves from him as a scary teacher……'

　Gamma wondered as he read the thoughts from Yusaku's brain. Because on their planet, power is justice──.

＊

　The next morning, Yusaku's smartphone alarm went off.

"Umm……?　……morning?"

　Yusaku opened his eyelids and woke up somewhat heavy. He snapped his neck and took a deep breath. Yesterday, he was struck by lightning supposedly── but his memory is hazy and he is not sure. After regaining consciousness, he checked his entire body, but there was not a single burn on him, and his body was in perfect condition, so he went home without visiting the hospital.

　Crawling out from under the covers, he stared into the bathroom mirror. Squinting his narrow eyes even more, he sees the same gorilla face as usual. Even though he feels lazy, his bearded face is rather more blood-colored than usual.

"Ummm……, was that a dream……?"

　After washing his face in agony, he once again stood in front of the mirror and felt a sense of discomfort. Somehow, he felt that he looked nice. Yusaku had never thought of himself as a narcissist in his life. And yet, his right hand is now slowly stroking the bulge between his legs through his underwear. He wanted to think it was just a morning erection, but something was off with that. He thought this gorilla face was lovely, this macho body was lovely──.

　Yusaku took his erect cock out of his underwear and squeezed it with all his might. It had been years since he had masturbated in the morning. Every time his fingertips stroked the cock, a tremendous amount of pleasure ran from his groin to his brain.

(My face, my body, it's so erotic♥ If such an old, smelly, hairy, macho guy was right in front of me, I would have been…… I can't get enough of it♥)

　Excited by his own body, Yusaku was thinking about his colleague Mamoru Gouda, a physical education teacher, in his mind as he squeezed his cock up and down. He is a big, manly man who deserves the nickname gorilla even more than Yusaku, and he, like Yusaku, is shunned by his students. Yusaku indulges himself in the fantasy of being raped by Mamoru.

　He is even bigger than Yusaku, a rugby player, standing nearly 190 centimeters tall and weighing over 100 kilograms. He has muscles like armor all over his body, and fat covering them. He has a massive pec, a firm buttocks, and long, stout arms and legs. In addition, he remembers seeing Gouda's cock hanging from his crotch in the bathroom when they were leading a school excursion, and it was black from being tanned. Yusaku's sexual sensations were heightened by the thought of being hugged from behind by a man like that.

(I want to have Gouda's thick cock in my ass, and have sex with him♥)

　As he continued to masturbate with heavy snorting, he gradually became more and more aroused.

"Oh, my gosh♥"

　Raising his voice low enough to echo through the room of single men in the early morning, Yusaku ejaculated a large amount of cum. The sperm spurts out from the tip of his cock, which surges with a thud, staining the washbasin and dripping onto the floor. As soon as the thick seed splattered on the floor, he felt that something precious was lost inside him. But that feeling of loss was fleeting. Soon he was masturbating again.

　More than the feeling of something missing from him, just thinking about Gouda now was enough to give him an erection he could not stop. His body ejaculated again and again, unconsciously wishing to be messed up and fucked by a man who was stronger than he was.

＊

　Yusaku changed into a polo shirt and trackpants, had a light breakfast of bread and instant coffee, and left home. As he drove to school, he could not stop thinking about what had happened since yesterday. That lightning, the numbness in his body, the voice he heard before he lost consciousness. Besides, he thought it was obvious that there was something wrong with him, as he had been masturbating like a madman just now, thinking about his fellow teacher──.

　But somehow that feeling of uneasiness soon vanished.

"……Well, but if I had been struck by lightning, I wouldn't be in such good spirits."

　And I feel like it's not that weird to masturbate while thinking about someone I admire, and the fact that I can ejaculate so many shots so early in the morning proves that I'm still young, right?

　Yusaku laughed to himself, and the car arrived at the school.

＊

"Good morning, Koori-sensei."

"Good morning, Sensei!"

　When Yusaku arrived at school, he was approached by two men on the staircase landing. One was that Mamoru Gouda. The other was a boy in the second grade── Sho Namikawa. Yusaku had been seeing them together a lot lately.

"Ah, good morning, Mr. Gouda……"

　As he bowed his head, feeling somewhat guilty about the person he used as a masturbator, Yusaku smiled at Sho, who was standing next to him.

"Hmm?"

　Sho, the one who had been smiling at him, looked quizzical and suddenly grabbed Yusaku's square face with a firm grip and looked deep into his eyes.

"Oh, hey, Al……, Namikawa! What are you doing?! You're being so rude to Koori-sensei!!"

"Koori.…… sensei, are you feeling okay? Is there anything wrong with your body? ……I heard that there was a lightning strike on the ground yesterday, and I wonder if you might have been hit by it."

"If he was struck by lightning, then Koori-sensei shouldn't be so energetic!"

　Gouda poked Sho in the head with his big fist and dragged him down the stairs, apologetically saying, 'Sorry, my idiot caused you so much trouble.'

　It was like a married couple comedy dialogue…… Yusaku, who had been taken aback by the flowing exchange between the two of them, regained his composure and slid his fingertips over his cheek. The warmth of Sho's hand feels like it's lingering on his skin.

(……What is it? Why am I so aware of Namikawa?)

　For some reason, just thinking about Sho makes his chest jump noisily. He is big for a high school student, but he is still almost one size smaller than Gouda. And his face still has some boyishness to it. Yusaku is not interested in men. He thought it would be a bad idea to have feelings for a minor in the first place.

　Once again, Yusaku remembered that he had masturbated this morning while thinking about Gouda, shook his head, stepped off the dance floor, and walked up the stairs.

"What the hell is going on with my body……?"

　Mumbling to himself, he headed for the teacher's room. On the way, he passed through a corridor filled with cheerful greetings from the students. Normally, listening to their voices, he would gradually brace himself, but this morning his eyes unconsciously followed the buttocks of the strong male students and male teachers.

＊

　I found Alpha. He was inhabiting the body of a male student 【Sho Namikawa】. And he also must have found me.

　Gamma shivered with delight. Nevertheless, it was extremely difficult for him to freely manipulate Yusaku's body, since he had parasitized into a human body in one step. Normally, parasitic life forms, like Alpha, would first parasitize a small creature and then gradually change bodies over time. And finally, it should have taken over the body of a creature with a complex structure like a human being.

　Therefore, in his current state, Gamma cannot move even one of Yusaku's fingers. All he could do was to work on his brain so that little by little Yusaku would develop a liking for the Alpha and become aroused by the muscular man.

＊

(My body hasn't felt right ever since I woke up this morning……)

　After finishing his fourth period class, Yusaku was lost in thought on his way back to the teachers' room. He let out a heavy sigh as he recalled the class in which he had been unable to concentrate at all. Deep in the pit of his stomach, he felt a warm feeling…… A strong feeling that shook his whole body and soul welled up and wouldn't subside. If he had to describe the feeling in words──, 'I'm horny.'

"Hey! Koori-sensei!"

　Yusaku turns around at the sound of a thick voice that shakes his eardrums, and with loud footsteps, Mamoru Gouda rushes up to him.

"Gouda……sensei?"

　Usually, Yusaku would have greeted him without hesitation, but he looked away from Gouda with an agitated expression on his face. If he were to look directly into Gouda's face now, his body─, and especially his lower half would surely react. He could not hold back, not only in the morning, but also between classes, for he had masturbated in the bathroom while thinking about Gouda.

　Gouda looked at Yusaku in such a fearful manner and frowned.

"Koori-sensei, are you all right? You look even paler than before."

"Ahh……, well……"

　Yusaku clammed up. When Gouda confirmed that no one was around, he withdrew Yusaku's hand and ran into a nearby teacher's bathroom. Then, he pushed Yusaku into the bathroom stall, put his hands on the wall, and cornered him.

"Oh, um…… Gouda-sensei……?"

　Yusaku's cheeks blush just by looking closely at Gouda's face as he lets out a rough breath at close range. Why am I staring at Gouda at such a close distance, so close that our lips are almost touching? What is the situation? Could it be…… that I can kiss…… Gouda-sensei?

　No, no, no! Why would I do that? My head is dizzy. This morning I had developed a fondness for Sho, and now, for some reason, looking at Gouda, I feel euphoric and my chest is almost constricted.

"Gamma, you're there, aren't you?"

　Gamma? His confused mind could not comprehend what Gouda was saying. Yusaku gulped as Gouda's thick fingers lifted his chin. Gouda's breath. Just feeling that warm exhalation on his skin is enough to make his brain sweetly numb and his thought processes burn out.

(No……!)

　Despite the voice in his mind, Yusaku naturally put his hands around Gouda's neck and pulled him to him. And then──.

"Nmm……"

　A discreet kiss sounded between the two of them. It was only for a moment. Soon their thick lips overlapped each other, and Gouda's thick tongue invaded Yusaku's oral cavity.

"Hmmm……♥ Oh…"

　After exchanging saliva, Yusaku clutched the hem of Gouda's jersey tightly as if clinging to him. His pleasure is further heightened by the thick kisses that tease his mouth. A sweet tingle ran down his spine, numbing his brain to the point of debauchery. It was as if a tongue was plunging deep into his brain, licking and stirring it──.

"Hah♥ ……Nmm~~~!"

　Yusaku's body trembled as he raised a muffled voice with his lips covered. He lost his footing and leaned his body against Gouda. Saliva was dripping from the edges of his lips, but he could not stop it. I never thought I would feel this way about a man──.

"About time you could get a little control over that body, Gamma?"

　Again. What is Gouda-sensei talking about? Thinking that, Yusaku's head snapped up and down, regardless of his intention.

"Yes, Alpha-senpai. Thanks to you……, it will be possible in a few moments."

(───What?)

　The words that leaked out of his own mouth without his permission sent a chill down Yusaku's spine. The eerie sensation of having his body controlled by the will of someone other than himself.

"Gouda-sensei…… What in the world is this……?"

"Wow! As expected of Koori-sensei. It seems that the aliens won't take over your body so easily. This place is too small, let's go to the P.E. teachers' room!"

　Yusaku was stunned, but a good-mooded Gouda grabbed him by the arm and took off into the corridor. They were headed for the P.E. teachers' room. It was the waiting room for the P.E. teachers and was a relatively private place in the school. Once there, he would not be able to ask for help from anyone.

　However, even though he wanted to resist Gouda, Yusaku's legs would not stop moving on their own. When they reached the P.E. teachers' room, Gouda made sure there was no one in the room and locked the door.

"Come on, Gamma. Embrace me with that blessed body of yours……"

　When Gouda whispered in Yusaku's ear, a sweet numbness ran through his brain again. This time, a kiss on the mouth was not enough. His whole body craved Gouda to the point of madness. He wanted to embrace Gouda and feel the warmth of his body.

"Yes♥ Alpha-senpai……♥♥♥"

　Yusaku's body hugged Gouda with all his strength and buried his face in Gouda's shoulder. Yusaku's heart was beating fast and his lungs were filled with Gouda's odor. The smell of thick sweat. The scent of male pheromones. 【Yusaku】 took a deep breath repeatedly, absorbed in the experience.

＊

──Alpha-senpai is still amazing. He manipulates the body of an earthling at will. It is as if he was born an earthling.

　Not to be outdone by his admired senior, Gamma sent his own cells through nerves from 【Yusaku Koori】's brain to his entire body. Taking control of each muscle fiber, Gamma slowly took over control of Yusaku's body. As he rubbed his plump pectoral muscles with his fingertips, now able to move them, and rolled his fingers over the colored protuberances at the tips, his fearless face contorted and his brow furrowed in wistfulness.

"Good. You have a talent, Gamma. I'm sure you'll get the hang of it in no time. I'll help you, too. The trick to quickly gain control of a male Earthling's body is to induce him to secrete male hormones through sexual intercourse, temporarily paralyzing his brain function."

　As he said that, Alpha reached between 【Yusaku Koori】's legs and grasped the bulge through his trackpants.

"Ohhhhhh♥"

　Gamma's mouth let out a pitiful cry at the sudden strong stimulation. His eyes went blank and he thought he saw flashing stars. His whole body instantly relaxed, and his crotch area became warm and tender. With his underwear soaking wet, Gamma buried his face in Alpha's neck and clutched at his thick arms.

"Nnghh……♥ Hmph……"

　Every time the smell of Gouda fills Yusaku's lungs, the back of his brain goes numb. Starting from the ball sack that is being rubbed by Alpha, stimulation is transmitted to his whole body, and little by little, 【Yusaku Koori】's body becomes familiar to Gamma. While gently rubbing the ball sack, Alpha's hand holding the cock moves powerfully up and down. Alpha's skillful touch brings out Gamma's pleasure, and at the same time, Yusaku's brain feels the stimulation.

"How's it going, Gamma? I'm sure you're getting used to that body by now. Next, you're going to give my cock a footjob, and then you're going to be able to manipulate that body with even more precision."

"Yes…… Alpha-senpai♥♥♥"

　As Gamma used his fingertips, which were difficult to move, to pull down Alpha's underwear, his huge cock popped out and shuddered violently, as if in anticipation. Just smelling that shiny black thing at close range made Gamma's crotch even hotter, and 【Yusaku Koori】's asshole twitched. Gamma clamped Alpha's big cock between his legs and began to rub it slowly up and down.

"Hmmm♥ Huh……♥"

　Alpha, whom Gamma admires, is getting pleasure from having his cock pinched between the soles of Ganma's feet. Gamma's whole body shuddered with the pleasure of serving his senior.

"Hmph……♥ Good……, 【Koori-sensei】. Rub it harder……♥"

"Yes, 【Gouda-sensei】……♥"

　As Alpha told him to, Gamma moved his legs even faster and squeezed Alpha's thick, hard cock. The heat he felt in his soles was proof that Alpha was feeling it. That makes Gamma so happy. 【Yusaku Koori】's body was now the perfect puppet for Gamma. Not only was Gamma able to manipulate Yusaku's body freely, he was also able to recognize the knowledge and experience that resided in Yusaku's brain, and when he was even called by his physical name, it was as if he had been an Earthling, 【Yusaku Koori】, since birth. The fact that the owner of the original body is screaming deep inside of his body is driving his sense of immorality and arousing Gamma's arousal.

"I'm cumming! I'm gonna cum from your footjob, 【Koori-sensei】♥♥♥"

　Immediately after Gamma's feet squeezed and gripped Alpha's penis, a white fluid shot out of its tip. The sticky liquid splattered on 【Yusaku Koori】's face and chest, and dripped noisily down to his navel. Gamma was delighted even by the raw warmth of the liquid, causing 【Yusaku Koori】's stern face to relax.

"Thank you……, 【Gouda-sensei】♥"

　Receiving the thick sperm of a respected senior with all his body. Such an honor, Gamma thought. He wiped and licked the cum stuck on his chest with his fingers and sucked on 【Mamoru Gouda】's cock.

"Nggg……♥"

　His cock is warped and hot. Every time Gamma gulped down the liquid overflowing from the tip of it, he felt the too-thick male sperm juice pouring into his own stomach. It felt so good, so good, that Gamma's lips pursed as he tried to swallow more.

"Mmm♥ Oh, a cleaning blowjob, huh? You're a quick learner. As expected of the elite parasitic life form Gamma──,or rather my cute junior 【Koori-sensei】♥"

"Haaah……♥ Mmm, hmmmm♥♥"

　Gamma flicked his tongue and licked off the cum that was heaving on Alpha's cock. It smelled foul and fishy. But for Gamma, a parasitic life form, the DNA of a superior male is the best reward of all.

"【Gouda-sensei】……, please fuck your big cock in my asshole♥"

　Gamma opened his buttocks with both hands. Then, he thrust his hips toward Alpha, as if to show off his widened anus. The action made Alpha swallow his spit, and his cock became erect again.

"【Koori-sensei】, it looks like you have complete control over that body, doesn't it? Well, then, right off the bat, I'm going to have to give you a reward for your excellence……♥"

　A big, hard male ass with plenty of muscle. The anus, which can be seen at the back of the valley, is cleanly shaped and has probably never had a foreign object come in or out except for defecation. Alpha pressed his cock, glistening with saliva and cum, against it. His cock slips into 【Yusaku Koori】's anus, which opens and closes repeatedly, as if begging for a kiss.

"AHHH♥♥♥ 【Gouda-sensei】's big cock is coming into my anus♥♥♥"

　The pleasure of having his anus slowly pushed open sent shivers down Gamma's spine. The first time he tasted the pressure of a strong man's cock. The Copulation with a respected senior. There was no way he could not be aroused.

"Ohhhh, this tightness……♥ Straight P.E. teacher's……, tight asshole♥♥"

"Oh my gosh, that's amazing♥♥♥ Ohhhh~~♥"

　The two muscular gym teachers were covered in sweat and repeated ejaculation again and again, making lewd sounds and moaning in the small room.

＊＊＊

"Ugh! Such a big cock in my ass……!"

　Yusaku shuddered at the sensation of having his asshole pierced by an extremely thick cock. Even just accepting a foreign object in the anus is an unusual experience, but the mass of it was incredible. It was a wonder that the small hole for excretion was not torn. The pressure of the glans invading his anus, pushing and expanding the walls of his intestines, caused his asshole to contract and tighten in a desperate attempt to take in the foreign object.

"Aaahh……, I love it♥♥ I'm going to…… get addicted to sexual intercourse with a human body♥ In addition, your ass is also great, 【Gouda-sensei】♥ Nmm♥"

　The person who calls Yusaku 【Gouda-sensei】 is Gamma, who had taken over the body of 【Yusaku Koori】. Yusaku's control over his own body was completely taken away by Gamma, a parasitic life form, and Yusaku was forced to form a master-slave relationship with Gamma, transforming him into an entity that can transfer into another body. And now Yusaku has been forced to become a parasite in the body of 【Mamoru Gouda】 and is being raped by his former self's cock. To be honest, he no longer knows what is going on. The only thing he can say is that the body and brain he is now using are intensely aroused by the perverse current situation. Moreover──.

(Aaah♥ It feels good, doesn't it, Koori-sensei? It feels soooo great to have my body taken over by Koori-sensei, and to have my asshole fucked by a man♥♥)

　The senior P.E. teacher whom Yusaku has always respected has had his sexuality twisted by an alien and is still excited and happy to have his body taken over by Yusaku, a junior P.E.teacher. At first Yusaku was disappointed in Gouda, but then he sensed that Yusaku himself was beginning to develop a new sexual proclivity. The pleasure of taking over another man's body and having his anus fucked by his own former cock. This unusual sensation distorted Yusaku's sexuality 180 degrees.

──Guju……Zububu……Nuchu!

　Yusaku is fucked by Gamma in a standing back position, his cock is sucked hard by Alpha, who controls 【Sho Namikawa】's body, and he has already cum many times. Until just the other day, he was heterosexual. He never thought that he would become a pervert who ejaculates so much while being fucked and sucked by a man.

　A sweet voice rises from Yusaku's lips as his body is rocked back and forth as if being tossed by the waves in the shallows. The inside of his intestines tightens as if trying not to let go of his former cock, and instead of eliminating the foreign object, it moves in the opposite direction, pulling him deeper and deeper.

"Oh, 【Gouda-sensei】's asshole is so tight, it won't let go of my cock♥ Oooohhhh♥♥"

(Haah……♥ Wow, I can make such an erotic voice. Awesome, I want to hear more♥)

(Ohhh, Koori-sensei's cock is so nice~~~♥♥♥)

　As if in response to Gouda's excited cry, Yusaku's brain was filled with thoughts of the male's cock. Moreover, that cock was once his own. Nothing but the best.

　The sensation of having his sexual orientation twisted and gradually being turned into a homosexual was also an experience so great that Yusaku could not describe it in words.

"Shake your hips more……! 【Koori-sensei】!!"

"Yes, 【Gouda-sensei】♥♥"

　Yusaku found himself pretending to be Gouda, giving orders in a commanding tone to Gamma, who was taking over his former body. The deep, wild voice leaking out of 【Mamoru Gouda】's mouth. The sense of perversion that comes from playing someone else. The frustration that Yusaku has felt ever since he became a high school teacher is now being removed. Now he is Mamoru Gouda, getting pleasure in Mamoru Gouda's body, trembling Mamoru Gouda's cock, and spraying Mamoru Gouda's DNA from the tip of his glans. Yusaku was intoxicated by that immoral act, which could not be replaced by anything else.

"Oh, gosh! I, 【Mamoru Gouda】, a P.E. teacher, am getting my asshole fucked by a junior teacher……, and Ohhhhhh! I'm gonna cuuuum~~~♥♥♥"

(End)