April 23rd, 2022. 9:45 o'clock, UTC + 9, Japan time zone.

The universe-invading species Sphere had come to Earth, accompanied by Hudram and the alien gang under his leadership. An alien from that gang stole a Geartlinger blueprint from Zenkaiser and used it to transform into Zenkaiser Black. This guy was a Seijin Zarab. A Seijin Dada on Hudram's faction used advanced scientific technology to copy the full power and combat armor of the black and white Kamen Rider Falchion Amazing Siren, and then transformed into a Kamen Rider Falchion Amazing Siren.

"Wake up, slowpoke!!" Akito grabbed Kengo's feet and beat them on the bed repeatedly.

Kengo was sleeping like a log on the bed. Even if an earthquake had shown up, he was unfazed.

"Zzzzzzzz~~" Kengo only made a snoring reply.

"OK fine, you know it." Akito got disappointed and left for shower.

After 15 minutes in the shower, Akito was out and clean in new clothes. Kengo was still in bed snoring as loud as a lion. Right from the beginning, he wrapped himself like a cocoon, and the cozy blanket was his only shelter to hide from the outside world.

"Just get out and take a bath already." Akito came back and see Kengo still motionless.

Finally, Akito decided to go out for a peaceful walk outside the park to enjoy the refreshing air. Only at that time, Kengo had got up from bed. His head was messed up, his clothing was like a jumble, his body was smelly like rotten cheese.

"Next time, if I wanna kiss you when you have bad body odor, I will come towards you with a clothespin clamping my nose so that I won't get poisoned with your smell."

April 27th, 2022. 6:45 o'clock, UTC + 9, Japan time zone.

Akito entered Kengo's room and called him and Asumi up. He prepared hot water for a bath for two. Akito laughed and called out: "Asumi and Kengo, wake up, my dear.

"Whoa, wah, wa... Akito, give the two of us a little more sleep, Akito."

"OK, I'm ready with hot water, if you don't wake up, I'll put dildos in your asses." Akito whispered.

Just sleeping, but hearing those tickling words both involuntarily sat up. Akito laughed and said, "Oh hey, I haven't done anything. Hey, get up and shower. I'm going to prepare lunch."

Akito left.

But actually the two went to the bathroom to make love and then took shower. Before they could get out, Akito entered. Akito did not have a piece of cloth on his body. Akito's dick and testes bounced back and forth between the pubes, making Kengo and Asumi excited. The three of them started kissing on the bathroom floor. Akito sat down on the edge of the tub and said, "Can you two keep my boy excited?"

Kengo and Asumi replied, "Yes, what's wrong with that?"

Kengo brought his mouth to suck and licked Akito's penis repeatedly and licked Akito's pubic hair and testicles while Asumi slurped Akito's nipples.

"You two make me so happy, I'm about to go crazy, Kengo and Asumi... Ah... Ah..."

Kengo and Asumi started swapping places. Kengo sucked on Akito' nipples until Akito's nipples turned red and Asumi licked his penis repeatedly, licking both the pubic hair and testicles of Akito and licking it skillfully. After getting bored, both Asumi and Kengo licked Akito's armpit because every time he licked it, Akito was really charming.

"Kengo and Asumi, both of you are so talented. But I wonder one thing, who taught you two to be so talented?" Akito exclaimed excitedly.

Kengo and Asumi both replied: "It was our loving husband Akito who taught us."

Akito laughed gleefully. Akito kissed Kengo's lips and then Asumi's and said, "My two treasures, what do you want me to do for you, I shall satisfy your needs."

Kengo and Asumi only replied "Yes".

Akito sat Kengo and Asumi in their respective seats and gave each of them a dildo, then let them both thrust each other in their own asses while saying "uhhhhhhh" over and over again. Akito had wanted to devour Kengo and Asumi's cocks and testicles while they were still biting each other's nipples. Akito was still sucking and licking both of their penises and pubic hair making them excited as they were both biting each other's nipples. Both Kengo and Asumi cried out in pain but also endured. Then, tired of the stimulation of the lower part, Akito kissed and licked the nipples, armpits, chest, neck and lips of both boys and said, "I'll wait for you two outside, but don't pull it out."

When the two stepped out and stood in front of Akito, Akito called them closer as if being controlled.

"Let's have fun together, the three of us." Akito said.

Only two seductive voices answered, "Yes, husband".

Suddenly Akito blindfolded them and let them suck on his penis. Akito laughed and said, "You two are naughty."

But they still sucked and licked everything on Akito's body. After getting bored, Akito took his penis out and put on a condom, shoving Kengo from behind but in a sitting position, while Kengo's mouth was still sucking on Asumi's penis lustfully. When they got close, Akito gave Kengo his armpits to smell and then asked Kengo to go back to having sex but in bareback style (no condom). This time the two kissed and kissed each other violently. After finishing the job, Akito continued to have sex with Asumi. Akito then took his penis out and put on a condom, reaching Asumi in a prone position, but Asumi's mouth was lustfully holding Kengo's penis. When they were almost out, Akito asked Asumi to come back and gave Asumi his armpits to smell and when he got close, Akito took out his condom to pound Asumi, but Asumi and Akito still kissed passionately. When the job was done, Asumi and Kengo got the dildo removed by Akito and Akito said, "Have sex with me babies."

The two handsome boys were like children being given candy, they sucked on Akito's penis from top to bottom without missing a spot. Akito seemed to get very intense stimulation from his two boys. Both of them let Akito lay on his belly and Kengo had Akito put a leather ring on his mouth and suck on his penis and testicles, and Asumi gave Akito anal penetration without condoms and lubricants and repeated again like how Akito made love with him but in a more perverted manner. Asumi went out to beat Akito with a belt but Akito could only endure the beatings.

After that, when they got bored, Kengo and Asumi switched places. Asumi put a collar around Akito's neck and Kengo did the same as Akito did to him and in the end Asumi inserted his penis into Akito' ass because it still had Kengo's penis. The two viewed Akito as nothing more than their own sex slave. Akito brought up their armpits to smell madly and Akito cried out in pain but neither of them cared about this. Akito still cried out in pain but cried loudly. The nipples of all three were sucked and licked until wet. After getting bored, the three of them kissed and changed their latest positions and time passed quickly. The three of them quickly ate dinner, cleaned up, and rested. Akito hugged his two lovers boys (and slaves) and kissed their foreheads.

"Well, we should have gone to rest." Akito said.

Kengo had his ponytail, Asumi didn't.

April 30th, 2022. 9:45 o'clock, UTC + 9, Japan time zone.

No trace of the Spheres.

"Smile, smile." Kengo teased Akito as they were in the botanical garden.

Akito got tickled so hard that he didn't smile, but he laughed loudly as he jokingly begged Kengo to stop.

"The rich sperm of young healthy and strong heroes will taste good." A voice came out.

June 3rd, 2022. 9:45 o'clock, UTC + 9, Japan time zone.

Aruto was imprisoned.

"My little adorable boy really needs to get disciplined."

Aruto's fairly long hair wasn't tied, but it was clipped instead. But he still looked attractive anyway. Aruto wasn't brainwashed, fortunately. Perhaps nobody cared to do mind control, or perhaps nobody ever considered about it.

"Stand up."

Aruto obediently listened to the call from outside the room and headed for the door. The door outside Aruto's room didn't look like the solid door of his bedroom at home. The room looked like it was more like a dungeon of a secret laboratory. The door was made of a durable transparent material. A slight breeze ran across Aruto's spine as a mass of green slime crawled into his room through the vent on the ceiling. The slime flooded the whole floor and stuck on Aruto's feet to immobilize him. Thin tentacles emerged from the slime pool and touched his body.

"Don't need to freak out yet. What you really have to do now is relax." The unseen game master ordered to Aruto through the radio inside his room.

The voice was clearly a male, but Aruto couldn't see its owner. What sinister plan did the person have for him?

"You're not the only prisoner here. And I'm not the only supervisor here. You wanna ask me if I'm a man or a monster, the answer is best discovered on your own experience."

The tentacles and the slime started to make uncomfortable friction that forced Aruto to undress himself. But they didn't stop at this point either, because they immediately touched his exposed skin and rubbed themselves against him in all spots. Aruto groaned with discomfort as he struggled in the gooey mass of slime and tentacles.

"Your neighboring rooms have been occupied, their inhabitants are sharing the experience as yours."

On the left side of Aruto's room, a person shrieked as tentacles engulfed his body and rubbed themselves against him to coat him with slime. But the room was soundproof that inhabitants of neighboring rooms couldn't hear the sounds of each other.

"Can't hold it back any longer..." Aruto groaned in pain as a tentacle entered his body from behind.

The person in the room next to Aruto's room stopped struggling and passed out. He was Hiiro, who was also taken captive like Aruto was. Every part on Hiiro's body was excited beyond limit but the tentacles didn't stop stimulating him even though he was unconscious. Hiiro's whole body seemed to be stretched to its fullest extent from being over-stimulated, he was exhausted and closed his eyes, ignoring the tentacles. Next to Hiiro's room to the right, Touma was sucking on a tentacle born from the mucus under his feet while his back door was penetrated by a tentacle.

"Someone's going to lose his mind. But sooner or later this experiment will be successful." The unseen game master said.

Aruto collapsed on the slimy floor with no will for resistance, his mind shattered into a thousand pieces as he let his body wrapped in tentacles and doused with the euphoric slime. The slimy tentacles squeezed him tightly, preventing him from moving. Overwhelmed by burning lust, Aruto endured every single sense of pain and pleasure as numerous tentacles engaged in a mating ritual with him. Other known individuals who were also imprisoned in the facility also had their senses stimulated by having sex with tentacles. But none of them knew the real face of their abductors and the game mastermind.

July 3rd, 2022. 9:45 o'clock, UTC + 9, Japan time zone.

A month had passed.

Aruto was still imprisoned. But this time Aruto was a completely mindless slave who was having sex with his master. The master wore a formal-looking suit. The mastermind's face was unveiled at last. The mastermind was biologically male, and he was pounding Aruto from behind with his hand holding a leash wrapping around Aruto's neck. Over a month, slime and tentacles corrupted Aruto's mind so badly that anyone could be fairly satisfied by using his body for pleasure. Maybe the mastermind was a completely normal human. Or maybe he was a monster with a human disguise. Or maybe he was an authentic monster. But these revelations served nothing significant for Aruto now. All he could do as a daily chore was eating, exercising, working, learning, and making love.

"Are you satisfied with me?" Aruto asked the mastermind.

"I really like your fresh clean body. You don't smell bad at all." The mastermind grinned.

"Where are my friends?" Aruto asked.

"I kept them very safe and very neat. They are okay, don't fret too much about them. By the way, your memories and the memories of your friends are safeguarded for all eternity. If you want your old name and identity, I have them kept as your former self." The mastermind said.

The ecstasy overflowing Aruto's body spiraled beyond his control as the mastermind finished having sex with him. He could see his master at last.

"Am I a human or a monster?" The person said.

It took a brief time for Aruto to touch the mastermind's face. The skin was smooth and the facial features were human. It was a masculine face. A human face.

What if Aruto realized that the mastermind was actually a monster with a hideous look that could make the worst nightmares of people making direct eye contact with him? It didn't mean much for Aruto anyway.

"Is your name Aruto?" The mastermind said.

"It is. But today..." Aruto said.

"Today you don't even remember your name?!"

"I couldn't remember my name clearly." Aruto shook his head.

"Keep your old name. But your body is mine."

The mastermind behind Aruto's abduction was indeed a very handsome young man, not an otherworldly monster. He was nobody other than Igarashi Daiji, the younger brother of Igarashi Ikki. Somehow he got corrupted by unknown forces beyond human comprehension, or he developed a dark personality that he couldn't ever imagine, or maybe he got worse in mind on his own volition. With black hair of fairly long length equally divided in two parting sections and combed downwards to cover the sides of the forehead on his handsome face, Daiji could create the impression of a attractive young man. His bright black eyes showed different shades of emotions. Most important of all, Daiji was biologically human.

"What if the person keeping you as a slave is a hideous monster? I was also enslaved and made into a human toy, but my former master was a completely outrageous monster who was originally human. He took me to his lair when he was a human, and became a monster afterwards. I was overpowered by his superhuman abilities, and he brainwashed me. He kept me as his pet, and subjected me do different forms of defeat and success. I knew he was a middle-aged man who happened to be an immortal from thousands of years ago, and now he just disappeared." Daiji said to Aruto.

Actually Daiji didn't have a monster side, although his dark personality if personified was also humanoid and looked very similar to a human. The dark personality inside Daiji was Kagerou, who was a blunt, cold, manipulative guy. To distinguish from Daiji, Kagerou still retained the same hairstyle as Daiji but his hair was more wavy and wild. There were times when Kagerou separated from Daiji to function as an independent entity, and the two joined hands on various undertakings. The monster Daiji mentioned was a completely different person. He was Akaishi Hideo, a middle-aged man whose actual biological age was beyond millions of years. Akaishi was granted immortality by the almighty cosmic entity Giff, and had even received his powers to transform into a monster that looked like a bizarre combination of trilobite, stingray and prehistoric reptiles. Moreover, Akaishi was the head director of Fenix, the organization Daiji worked for.

"Stand still." Daiji gently told Aruto as he coaxed Aruto out.

Then, before Aruto could question him, Daiji took Aruto's half hardened cock in his mouth, tongue flat along the underside of his forming erection. Aruto gasped, a surprised moan falling from his soft lips as Daiji swirled his tongue along the length and pulled back. It was a rare sight to see the master actively giving oral for the slave, because normally the giver would be the slave. Fortunately, Daiji wasn't accompanied by any monster, he ran the whole underground facility on his own.

"What happened to Touma and Hiiro?" Aruto asked Daiji.

Daiji was occupied with sucking on Aruto's meat shaft that he didn't answer. A slave who could give questions to his master was something uncommon, yet Daiji was comfortable with this situation.

"Please master, answer me. Aaahh~~~" Aruto groaned as he got overwhelmed with arousal.

After a few seconds, Daiji released Aruto with his mouth full of fluid from the other male. He calmly told Aruto: "They're all here, kept as my pets. Don't need to get so agitated."

Aruto stood silent to let Daiji kiss him. It was a mesmerizing kiss, as Aruto's mind became blank a few seconds after the kiss. Daiji said to Aruto: "My former master gave me the same thing as I gave you. You know, I made out with my master almost 24/7, and just one pat on my head from his hand was enough for me to become his possession. He conditioned me to love him regardless of his identity as a human or a monster. Moreover, I have a dark personality."

All of Aruto's friends were brainwashed simultaneously in one go. They were kept as Daiji's personal slaves. However, Daiji was really intelligent to have seized different machinery from his former master to made his own party of slaves. With a whistle, Daiji blew a continuous streak of sound which made Aruto's head ache. Aruto stood motionlessly as the whistle rewrote his mind with different signals and commands. Unexpectedly, the sound of the whistle drew the attention of a group of people from a far distance. Daiji recognized each face among the crowd. He saw Hiiro, Touma and Emu, all of whom were totally brainwashed by Daiji himself. Even Daiji's older brother Ikki wasn't spared from the brainwashing. He was also present in the crowd gathered in front of Daiji's eyes. Everyone in the crowd had their hairs held in clippers and tied in ponytails. Daiji himself had hair clippers to hold his hairstyle.

As Daiji walked with the whistle in his mouth tooting lots of sounds, the crowd followed his path like a flock of mindless sheep. Only Daiji knew where he led his crowd to, because none of the people were taken to the underground facility voluntarily. The tune from the whistle was eldritch and otherworldly, so much that anyone listening to it got no clue about their direction of movement and logical thinking. When everyone except Daiji was sitting on mechanical chairs with helmets hanging over their heads, Daiji stopped blowing the whistle and remotely controlled the whole system to activate on autopilot. In a few seconds, the helmets covering the slaves' heads started buzzing and shaking violently as their wearers were overwhelmed by a surge of hypnotic power. The machines were painless, as nobody sat on them was screaming and struggling. Within five minutes, the machines stopped working and the captives were released. They were stunned and disoriented.

"It's time to make a big smile." Daiji said.

After scanning the room for a moment, Daiji counted his subjects carefully. He took his whistle and blew a tune. As the whistle song ended, Daiji took his older brother Ikki to his side. The mesmerizing melody wasn't the only factor making Ikki lose his mind, it was his gradual breakdown of free will through pleasure and pain with the slime and the tentacles that made him succumb to weakness.

"Well, my older brother Ikki, guess what I have for you." Daiji shook his head side to side and combed his hair until they became wavy.

"Daiji..." Ikki stared at Daiji with disbelief.

"It's all right. We have solved our misunderstandings together after a long time of cold war and heated arguments. You really love me, and I also really adore you. I'm very regretful about losing my rational mind when I fight against you because of our differing opinions and beliefs about humanity's future." Daiji patted on Ikki's head and comforted him.

Ikki knew he was in a troublesome situation, but he also knew Daiji was keeping him safe. He entrusted his own body and mind to his younger brother, very willingly. Ikki willingly surrendered himself to Daiji and was responsible for taking Aruto to the underground facility. It turned out that Ikki was the first person to be brainwashed by Daiji, because Daiji lured him into an inescapable trap surrounded by monsters. In short, Daiji was both a tragic victim of circumstance and a culprit in the mass brainwashing of Aruto's friends.

"Will you have fun with us?" Ikki and Daiji asked Aruto and his friends in unison.

Standing in front of the Igarashi brothers, Aruto nodded repeatedly without saying anything. Hiiro, Touma and Emu were accompanying Aruto at this moment, and they nodded with the offer from Ikki. Touma's best friend and lover Kento was standing next to Touma, and he was also brainwashed. Kneeling before Daiji, Aruto opened his mouth and took Daiji's erect cock into his mouth to suck it. Daiji didn't order Aruto to give him pleasure through spoken words, instead he looked at Aruto's eyes and controlled the other male with his mind. As for Emu, Daiji compelled him to engage in a foursome intercourse with Hiiro, Touma and Kento. The lovemaking scene of multiple guys under Daiji's mind control was a mixture of sexual ecstasy and unrestrained lust. Daiji jumped into the gathering group for pleasure, he was the master of the group and yet was as horny as his own group.

"You have no idea about what my time under the domination of Akaishi look like. It's total insanity. But the pleasure is endless." Daiji said, his tone started to become raspy.

Daiji gave Aruto an endless series of thrusting blows until Aruto was completely battered. When Aruto lay on the floor with his mouth soaked in Daiji's fluid, Daiji sighed with relief.

"Wake up!" A hand holding a shoe slapped on Daiji's face.

It really was Hiromi who had arrived to the scene and learned about Daiji's whereabouts. With his walking posture in a limp, Hiromi took the shoe to slap the faces of everyone in the room. It turned out that Hiromi took one of his own shoes to use it as a slapping stick to spank everyone out from the hypnosis.

"No way. What have I done with my brother?!" Ikki stared at Daiji in disbelief.

"Oh my goodness, why is Aruto here?! Why everybody is here?!" Daiji was totally confused.

Hiromi hugged Daiji very close and said to him: "Sorry, I'm late. Let's get everyone out from here."

"Aren't you Daiji's senior colleague in the office and his boyfriend?" Ikki asked Hiromi.

"We'll talk about that later. Now we need to escape." Hiromi urged.

"Now, go!" Hiromi took Daiji's hand and escaped together with Daiji and the other captives.

When everyone escaped, the underground facility was abandoned. It turned out that the real owner of this estate was Giff himself. But Giff wasn't a human. He was an ancient cosmic entity with a monstrous appearance and supernatural powers that would plunge civilizations defying him into chaos and madness.