I am Kamen Rider who reverses dimensions

Suddenly, a young man wearing a white jacket and a green shirt stood on the high steps, pointed at the strange man, and said:

"Don't be afraid, I'll take care of this guy!"

After saying that, he took out a strange driver, shook it ostentatiously, then patted it on his waist. With one hand, he grabbed the bottom side of the driver and pried it upwards, causing part of it to stick up. With the other hand, he took out a motorcycle-shaped prop, placed the motorcycle prop into the sticking part of the driver with a car sound effect, and then pressed it down.

"SignalBike! Rider!"

375 Shijima Tsuyoshi

On the high steps, the unfamiliar Kamen Rider grinned smugly, gesturing wildly with his hands in the air, and spoke in an exaggerated tone:

"Let's Henshin!"

Immediately afterwards, two white discs descended from the sky, swirling and dancing around him. At the same time, halos of white light, faintly resembling tire treads, enveloped him from below. Then, a Kamen Rider appeared before everyone, wearing what looked like a motorcycle helmet, with a red and white ribbon on his left shoulder, and dressed in what resembled a white racing bodysuit. Just then, his driver added a sound effect:

"Mach".

but.....

"Pursuit, suppression, it's always been Mach!"

Just when Gengo thought this unfamiliar Kamen Rider was about to make his move, he continued to stand on the high steps, spinning around, punching, and swinging his arms in various poses. The exaggerated performance, the excessively long transformation time, and his pronouncement made Gengo suddenly feel that this person had jumped out of the Super Sentai program on TV. After all, if it were him, the battle would probably be over by now.

"Kamen Rider Mach!"

Finally, Kamen Rider Mach finished striking his pose. Looking at the monster trapped by 'Cyclone' and 'Luna', he charged down with a 'whoosh'. He pulled out a gun with a tire component attached, using energy bullets to restrain the monster while rapidly closing the distance. After rushing to a certain range, he slashed his hand across the tire component, and the tire generated and surrounded an energy beam, slashing at the monster like a saw.

"Wow... is this the Kamen Rider of Fuuto? It feels... like a Kamen Rider~~~"

Seeing Kamen Rider Mach and the Memory Monster standing in a group, Kotobuki Tsumugi exclaimed in shock. Mio, who was taking pictures with her phone, nodded in agreement. Only Gengo was speechless, but he couldn't say anything. He could only pull the two girls away from the scene. He couldn't let them continue to hold him back.

"Kamen Rider... the white one?"

In the center of the battlefield, the tire beams sparked blindingly on the shell of the memory monster, but that was all. The memory monster then emitted a muffled sound, as if three similar voices were ringing out at the same time. It was unclear whether it was a problem with the memory host itself or a side effect of being eroded by the memory data. It appeared exceptionally dull and stupid, but it must be said that this guy's skin was really tough.

Kamen Rider Mach watched as his bullets and energy tires left only shallow white marks on the enemy, without causing any real damage. At that moment, the memory monster suddenly opened its mouth wide. The seemingly small mouth was actually the same size as its head. Then it exhaled a terrifying cold air. Blue mist spread across the earth and air, instantly creating the scenery of the far north.

Kamen Rider Mach's actions were surprisingly swift. He quickly dodged the frost's attack and took out a motorcycle gear, flipped up the driver, inserted it, and activated a new ability.

"SignalBikeSignalKoukan (Changing Outfit)! Kikern (Danger)!"

In the sound effects, Kamen Rider Mach raises his gun and fires it into the air. A triangular yellow road sign appears above the monster's head. Then, a bullet-shaped, small, ugly-looking shark falls out of the road sign. But as it falls, the small shark suddenly grows into a huge monster, opening its mouth and biting the monster hard. It shakes its head violently, as if trying to tear the enemy apart with its sharp teeth. However, before the monster can be shattered, it explodes with a bang, and the powerful force melts the surrounding ice instantly.

Looking at the flames in front of him, Kamen Rider Mach whistled, twirled the tire gun in his hand, and turned away nonchalantly from the aftermath of the explosion, seemingly quite satisfied with his achievement. But just as he was about to deactivate his transformation, a whoosh came from behind him. Kamen Rider Mach hurriedly tried to dodge, but only then did he realize that his feet had been frozen solid by frost and he could not move. He could only watch helplessly as the energy blast wrapped in lightning hurtled toward him.

"what!!!!"

Kamen Rider Mach's screams echoed throughout the street. Under such bombardment, his transformation was forcibly deactivated. He rolled several times on the ground before crashing into the wall, clutching his chest, his face flushed, groaning. His white jacket was covered in black ash, so dirty it was unrecognizable. The young man stared in disbelief at the Memory Monster slowly emerging. He was quite certain that his attack had taken effect, and he couldn't understand why the monster was now completely unharmed.

"Kamen Rider, Die!"

Seeing the young man's pained expression, the memory monster grinned smugly, opening its maw once more to unleash a terrifying blast of cold air, intending to turn the Kamen Rider into a lifeless ice sculpture. As the chill drew closer, Kamen Rider Mach felt the deadly aura. Even from dozens of meters away, he could feel his limbs beginning to go numb. At that moment, he thought of his sister, and... his... father...

Damn it, I can't just die like this!

Kamen Rider Mach, enduring excruciating pain, bent his seemingly broken arm, trying to restart the driver. But his realization came too late; time was running out. The deadly scythe of 'Death' was already at his throat. The young man gritted his teeth, determined to struggle until his last breath, even as he accepted his defeat here, in this unfamiliar city. He wondered if news of his death would reach his sister. If possible, he hoped his file would show 'missing' rather than 'dead,' so his sister might be less affected…

"Chimera?"

However, at that moment, a suffocating heat wave swept over him, instantly dispelling the chill that had unsettled the young man. He twitched his eyelids, slowly opened his eyes, and stared blankly at the dark figure before him, who was speaking to itself:

“I saw the relevant records in the ‘museum’ back then, and I never expected that someone would actually recreate that discarded case. It’s interesting.”

"Another Kamen Rider..."

However, the memory monster didn't react much to Genji's words. He merely tilted his head, seemingly lost in thought, before breaking into a happy smile, raising his hand and shouting:

"Delicious food, fun activities, let's start the slaughter! Hey?"

The next second, before the words had even finished, the memory monster noticed its vision spinning wildly before finally disappearing into darkness. Gengo showed no mercy and sliced ​​off the monster's head. However, the battle was not over. Gengo coldly clenched his fist and punched the monster's shoulder. Just as his fist was about to hit, the shoulder opened its mouth, transforming into a new head.

In legend, the Chimera has the head of a lion, the body of a goat, and the tail of a python. This monster, born from Earth's memories, naturally follows similar principles, though with slight differences in details. For example, the concepts of 'lion,' 'goat,' and 'python' have changed. This monster possesses a unique rebirth mechanism; it will not be defeated until all three memory avatars are destroyed. Furthermore, if the interval between their destruction is too long, the destroyed memory avatars will regenerate. Kamen Rider Mach just suffered from this; although if he had the habit of finishing off the enemy, he wouldn't have been so badly injured.

To be honest, if this memory monster had appeared shortly after Gensou's transformation, the boy didn't think he had any chance of defeating it. After all, its basic stats were quite outstanding, and he might not have been able to break through its defenses. But now, it might not be able to break through his defenses.

Three punches, just three punches, and this memory monster was completely defeated. The twisted Gaia Memory, like a bayonet, was expelled from its host's body, fell to the ground, and shattered. Gengo glanced at the policeman who appeared at the end of the street, silently picked up the young man, and left. He still had many questions to ask this mysterious Kamen Rider about his background.

"Ugh!!! Seriously, couldn't you be a little gentler?"

Gengo placed the young man on the rooftop of a building, a spot the boy had chosen beforehand. After all, hidden places weren't just underground. The young man's body had received Ripple treatment on the way, so he was basically fine. However, when he was put down, the man still grimaced exaggeratedly, as if he was about to faint from pain. Gengo, however, had little intention of joking around with him. He picked up the driver the young man used for transformation and said in a deep voice:

"what is this?"

"Driver, you're a Kamen Rider too, you should know that, right?"

The young man rubbed his arms; the healing effect from the ripples inevitably caused a sore and itchy feeling, so he shifted restlessly and casually remarked:

"Ouch, ouch, what kind of trick is this weirdo using? Why does it itch so much? I mean, could I have some kind of deadly ability?"

"I want to hear more details."

Yuanxiang grabbed his hair and slammed his head against the wall behind him. His scarlet compound eyes flickered a few times before dimming, and an ominous aura instantly filled the rooftop of the building. This made the young man swallow hard and honestly say:

"MachDriverHonoh – developed by Dr. Harley Hendrickson, Dr. Kurim Steinbert's mentor, and embedded with an auxiliary brain to support combat operations, etc... How about that, is that detailed enough?"

"What about this one?"

Yuanxiang then took out the motorcycle track equipment and stared at the young man, saying.

"SignalBike, a gadget that comes with MachDriverHonoh. Oh dear, all I know about it is the name. I can't possibly know the workings of a refrigerator just because I use one, can I? I mean, we're all Kamen Riders. You're in Fuuto, and I'm in Tokyo. Even though we've never met, you should at least have heard of Kamen Rider Mach. We're just across the street. If you don't even know this, then you're really out of touch."

"........."

"Hey, hey, hey, I think your eyes are dangerous!"

Seeing the silent Yuanxiang, the young man waved his hand somewhat flusteredly and shouted to the surroundings:

"Where's the green part of Kamen Rider W? Hurry up and fix this black part! I feel like it's about to get out of control!!"

"Unfortunately, there is no Kamen Rider W here, only Kamen Rider Joker."

Yuanxiang loosened his grip on the young man's hair, his imposing aura dissipating. He sat half-reclined on the ground, looking at him and saying:

"Tell me honestly what you've been through lately, otherwise I regret to inform you that you're trapped in this world."

"what?!"

The young man stared wide-eyed at the Kamen Rider in front of him and said:

"No, I... this... wait, who exactly are you?"

"Shouldn't you introduce yourself before questioning others?"

"My name is Shijima Tsuyoshi!"

The young man said urgently:

"He's a photographer, and also a Kamen Rider. And you, you are...?"

"Kamen Rider Joker".

Gengo flicked his finger, interrupting Shijima Tsuyoshi in a deep voice, then snapped his fingers and said:

"That's all I can tell you for now. I'll tell you the rest when I feel you're trustworthy. Right now, all you need to do is cooperate with my questions and answers."

"Ugh, this is so troublesome. I feel like a prisoner."

Shijima ran a frustrated hand through his hair, then leaned against the wall and looked at Genjiro, saying softly:

"Then I'll say it. Don't interrupt me. Even if you don't understand, wait until I finish speaking."

Gengo didn't raise any objections, but simply gestured for Shijima to begin his narration. The Kamen Rider Mach coughed, cleared his throat, sighed, and said softly:

"Well, how should I put it, when my brother-in-law and I were investigating Roidmude (mechanical mutants)..."

"Excuse me, I'm so sorry to interrupt, you said...Roidmude?"

376 accelerations

Roidmude (mechanical mutant) is a name that Gengo would never forget. Before fighting Shinichi, the 'Heart' he met was one of them. His friend was also dedicated to rescuing all his other Roidmude companions from Tenjuro Banno. However, after that parting, there was no news of him. While dealing with the monsters in Fuuto, Shotaro and Philip also kept an eye out for information related to Roidmude (mechanical mutant), but they only heard some rumors, and whether they were true or false still needed to be questioned.

So when Gengo heard Shijima utter that word, he was genuinely surprised. He hadn't expected to receive a message from a long-lost friend so unexpectedly. However, he couldn't be so blunt about his relationship with 'Heart' right now. He had heard the word 'investigation,' and he sensed something ominous. Therefore, when Shijima looked at him, the boy spoke in a very calm tone:

"I've encountered this unique life form before, but I didn't expect to hear about it from you again, so I'm a little surprised. I'm sorry to interrupt you, please continue."

"It's okay. It's great that you know Roidmude; it saves me the trouble of explaining later."

Shijima waved his hand dismissively, then leaned against the wall and continued:

"We are investigating the Roidmude (mechanical mutant) case, and in the process, we discovered a rather peculiar incident. At the scene of the victim's murder, none of the three or four security cameras captured the killer. And then, something similar happened again. Although no one was injured, the gold and jewelry stores were practically looted. And just then..."

Shijima Tsuyoshi's tone suddenly became cryptic, and he held up his finger, saying:

“We discovered that at the scene of each robbery, there were always three people watching. According to my sister, some criminals would return to their crime scenes to check if they had left any clues or to admire their ‘works.’ Therefore, we had reason to suspect that they were the suspects. Unfortunately, we had just rushed into the hideout of those three guys when we were attacked by a strange and powerful attraction. By the time I came to my senses, I was already here.”

Shi Daogang spread his hands and said helplessly:

"Believe it or not, I'm from another world. Although I have Tokyo and Fuuto on my side, they're completely different from yours. Alright, I've said my piece. The rest is up to you."

"I believe that, after all, I have experience traveling the world."

Yuanxiang said slowly and leisurely:

"So the biggest problem now is figuring out how to get you home first. Hmm... wait here for me. I have an idea to try. If it's not too difficult, I should be able to send you home right away."

After saying that, Gensou's figure disappeared from Shijima Tsuyoshi's sight and reappeared in the office, looking at the Cangxuan and Danzhu sisters who were studying the website there, and said:

“I have some work to do here, so it’s not convenient for me to take you out. So let’s try out this temporary body that ‘Luna’ created first.”

After he finished speaking, the hazy moonlight poured down, creating two petite bodies—this was something Yuanxiang had prepared for long ago. After all, his life was quite unpredictable, and who knew what he would encounter or what would happen next? So he had already started experimenting in this area, and this time it just so happened.

"You guys try it out first. If you feel anything is wrong when I get back, you can tell me right away so I can keep an eye on it in the next simulation."

"Yuanxiang... Sister?"

Seeing that Yuanxiang wasn't giving them a chance to speak, Danzhu was about to say something when Cangxuan grabbed her wrist and tugged at her wrist, interrupting her words. Cangxuan looked deeply at Yuanxiang, then at the gradually forming body, and said softly:

"Must go?"

"I absolutely have to go; my friend is probably in trouble."

"I understand now. So, the firm will be under our management during this period?"

"of course can."