I am Kamen Rider who reverses dimensions

However, just like Shiro did back then, when Gengo approached the Black Gang, Nanoha Takamachi, who had been far behind him, was instantly teleported in front of the Black Gang and launched a completed energy cannon at Gengo. Seeing this, Gengo knew that this surprise attack had failed and could only choose to evade and look for another opportunity.

However, to Genji's utter surprise, the black mass transformed into thousands of venomous snake-like energy bodies, coiling around Nanoha Takamachi's body, as if it had become her solid armor, or as if it had become symbiotic with Nanoha Takamachi.

Nanoha Takamachi roared because she had gained too much magic power in a short time. Dark power ripples suddenly spread across the sky. Genji was affected by the ripples and his body trembled. A blood arrow shot out from his back.

At this moment, the boy, who was starting to see stars, gritted his teeth and used all his strength to wipe away the spurting blood with the wind, plugging the wound to prevent anyone from collecting his blood and exposing his identity. Then, he swayed and fell helplessly to the ground like a kite with a broken string. The continuous battles and injuries had finally drained his physical strength and energy.

At the same time, a blackish-purple light erupted from Takamachi Nanoha's body again, and then disappeared, undoubtedly entering the barrier.

.........

"Has Kamen Rider been defeated?"

"That...that's impossible, right? That jerk may not be likable, but...how could he possibly lose?"

"It's all over, it's all over, it's all over! An enemy that even Kamen Rider can't defeat has appeared!!!"

"Don't hold me back! Kamen Rider must be badly injured. I need to take him to the hospital!"

"Useless! I told you Kamen Rider was useless, but you wouldn't believe me! What do you say now? You lost... You lost... This... This... Help!"

The sight of Yuanxiang falling from the sky was naturally seen by the people of Fengdu. Their reactions were completely different, but the despair in their hearts was like the dark clouds covering the sky. As residents of Fengdu who had experienced all kinds of strange events, how could they not know how deadly that mud-like black mass was?

Even though the people of this city have polarized attitudes toward Kamen Rider, none of them ever imagined that the black figure would fall one day. And after he fell, they couldn't even imagine who could step forward and take his place.

Even the guy who hated Kamen Rider the most realized that he had been protected by that guy all along.

So, with all sorts of thoughts in their minds, people began rushing towards the place where Kamen Rider had crashed, and cars on the street consciously veered forward at a 45-degree angle to provide an unobstructed road for the speeding ambulance.

But no matter how hard they searched, they found nothing. There were craters on the ground where the Kamen Rider had fallen, but they couldn't find even a trace of blood, as if someone had completely erased the existence of Kamen Rider.

"Does Your Excellency need to be so cautious? I believe they are here to help you."

In the distant sewers, the white-haired woman, her neck held by "Fang," looked at the wounded boy struggling between unconsciousness and consciousness. Sensing the situation around him, she asked curiously, but seeing that the boy didn't answer, she raised her hands and whispered:

"Then at least let me treat you. Your injuries are too severe. If this continues, you won't be able to continue fighting."

"Your...origins!"

Yuanxiang didn't respond to her words, but stared intently at the woman who had suddenly appeared beside him, pressing her for her identity. The white-haired, red-eyed woman frankly explained her background—

In the Book of Darkness, there is a program similar to that of the Guardian Knight, who controls magic and casts spells by merging with his master.

At the same time, because that knight was in charge of managing everything in the Book of Darkness, including the Guardian Knight system, he was also known as the "Master Program".

Furthermore, if separated from the Book of Darkness, the knight would lose his original meaning, so he is roughly equivalent to the Book of Darkness itself.

"However, I have now been expelled from the Book of Darkness, and that unknown virus has completely taken my place."

The controlling personality, with eyes closed and a face full of self-reproach and sadness, said:

"My master is also caught in the virus, I... have completely failed in my duty... huh?"

The controlling personality suddenly felt a slight stinging pain on her neck. She opened her eyes in confusion and looked at Genji, only to see the boy's bright eyes.

"Heal my wounds, and then... cooperate!"

167 Unison Joker

"The Book of Darkness was originally called the 'Book of Night Sky.' It was created to collect and study the techniques of great mages from all over the world, and it is a magical artifact that travels with its master."

While treating Genji's injuries, the controlling personality recounted the entire story to the boy, who was on the verge of death but had only a vague understanding of the incident:

"However, one of its previous owners modified its program. As a result of this change, the travel function and the ability to automatically repair damaged data went out of control. Most egregiously, its nature towards its master also changed. If it is not collected within a certain period of time, it will erode the holder's magic power. This is why the four guardian knights wanted to steal the magic power of others. But... even if they collected enough magic power, the master's fate would not change."

?

Genji, enduring the pain of his wounds being forcibly healed, opened his eyes and looked at the controlling personality with a puzzled expression, waiting for her to continue.

"Because once completed, the Book of Darkness will use the collected magic to indiscriminately destroy everything..."

"Wait, why is that?!"

Upon hearing this, Yuanxiang's expression changed immediately. He straightened up nervously and gripped the shoulders of the controlling personality tightly, demanding an immediate answer.

"It's because of the automatic defense system 'Nachtwal' added during the modification, which is also the reason why the Book of Darkness corrupted its master and caused the system to go berserk."

The controlling personality helped Gengo lie down properly as she spoke, continuing the treatment. But at that moment, Gengo grabbed her wrist and said in a low voice:

"You're not in charge of everything related to the Book of Darkness system..."

"But there's nothing I can do about it."

The controlling personality shook his head helplessly and said in a low voice:

“Even for a period of time after the completion of the Book of Darkness, Nachtwal will still be an automated defense system; in other words, it will take precedence over me.”

"This is a really troublesome system. Is there any way to stop it?"

"No."

The controlling personality turned Genji over and began to treat the wound on his back more deeply, saying in a sorrowful tone:

"Once the stored magic power and the master's life force are exhausted, the Book of Darkness will seek a new master to reincarnate. Therefore, all the masters to date have immediately died after completing the Book of Darkness..."

"Reincarnation? It sounds like an endless curse."

Thanks to the healing magic, Genji's spirits had noticeably improved. He tilted his head and looked at the controlling personality, continuing to ask:

"Judging from your tone, you must have experienced this many times. If that's the case, then why are those guardian knights still working so hard to collect magic power? Are they in such a hurry to send Gale on his way?"

"They don't know, or rather, they don't remember."

The controlling personality sighed and replied softly:

"In comparison, their system is subordinate, so they are powerless to resist many things. In previous reincarnations, I would fill in this memory for them, but because this reincarnation crossed planes, it touched on the program flaws during that modification, causing the data in the Book of Darkness to become disordered. If it weren't for the virus invasion, my original consciousness would probably have to wait a while longer to come online."

"So what's the current situation with the Book of Darkness? And what's wrong with my sister?"

Gensho sensed the conversation was veering off course, so he brought up his most pressing point. His controlling personality didn't mince words, speaking frankly:

"The Book of Darkness has undoubtedly been targeted. When I awoke, I checked the records and found that in the past few days, someone had been trying to activate the Book of Darkness's system using a high-intensity magic amplifier. This virus is also extremely targeted, aiming to replace my priority level in the Book of Darkness. However, the mastermind behind it obviously did not have a detailed understanding of the Book of Darkness's programming, which led to the virus and 'Nachtwal' fighting each other, causing the Book of Darkness to be in a state of shutdown."

After speaking, the controlling personality hesitated for a moment before continuing to answer Gensou's question:

"As for your sister, before I was expelled from the Book of Darkness, her permissions were set by the virus to be among the 'Guardian Knights.' It was probably a protection program set up by the mastermind to prevent the Book of Darkness from being destroyed. But judging from her current state, she has probably risen to the core permissions of the virus, acting as a thinking module to resist 'Nachtwal's' purge. So... her time is running out."

"...Can you enter the barrier?"

Gengo understood what the controlled personality meant. How could a small head like Nanoha Takamachi possibly handle such a long period of data calculation? He gripped the Gaia Memory tightly, stood up, and asked the controlled personality.

"I'm sorry, I..."

"Then come with me!"

After transforming, Gengo carried the controlled personality and ran quickly towards the agency. Although Shiro had vanished into thin air, his gadgets had fallen into a corner of the agency before the barrier was lifted. Now, Gengo could only pin his hopes on his mysterious bracelet, hoping that it could break the barrier of the Book of Darkness.

Genji acted swiftly, arriving at his residence in an instant with the controlled personality. At this time, Nogami Ryotaro and Momotaros were nowhere to be seen, but according to the note left on the table, they had also seen the commotion caused by the Book of Darkness, so they hurriedly returned to the electric train to seek assistance.

Gengo glanced at the note and hurriedly searched for the location in reality that corresponded to the time of Shiro's death. Finally, he found the ghost's belongings in the basement.

"A remarkable tool, but it lacks sufficient energy."

The controlling personality also sensed Genji's anxiety, so it gave a concise and clear answer:

"This brute-force method of cracking requires a large energy supply and also a certain amount of thinking modules. I can fill the latter role, but the former..."

"How about this? Can this be used as an energy supply?"

Before the controlling personality could finish speaking, Gensou took out a broken gemstone and showed it to her. The power contained within the Emperor Stone immediately astonished the controlling personality, who nodded blankly and said:

"Yes, plenty... Forgive my bluntness, but if you had taken this out earlier, those four guardian knights wouldn't have been able to harm you at all."

“This could be something with huge hidden dangers,” Gensou sighed, looking at the gleaming Moon Emperor Stone, and said helplessly, “If I weren’t desperate right now, I wouldn’t have taken this risk… What are you looking at?”

At that moment, Gengo noticed something was off about the controlling personality's gaze. Following her line of sight, he saw the data transfer station that Kamen Rider 2 had given him. That thing had completely overloaded and broken down when he transformed back into his physical body from his data form, and now it was just sitting there as a souvenir.

"The data remaining here..."

The controlling personality intently stroked the outer shell of the transfer station, magical halos shimmering at its fingertips, and murmured:

"There's no mistake, the data here is the prototype of the virus that invaded the Book of Darkness! Where did you get this!?"

Upon hearing this, Gengo was taken aback. In that instant, he finally understood why he was the so-called 'final piece of the puzzle'. If he wasn't mistaken, in Shiro's plan, the one currently acting as the virus's thinking module should be himself, the digitized version of himself!

So... I was part of the mastermind's plan back then?

Yuanxiang recalled the only memories he had of being a virus data entity, and smiled bitterly to himself. He had long since broken free of that form and could never act as a thinking module of the virus. He had only been in that form for such a short time, and that guy had even caught him. At this moment, he didn't know who was unlucky.

"How about it? Can I take advantage of this?"

Time was of the essence, and Yuanxiang didn't have time to think too much. He hurriedly went to the Earth Library and told the Controlling Personality everything about the Data Virus.

The controlled personality didn't say much. It took the Moon Emperor Stone, extracted its power, and performed calculations. In just three seconds, the controlled personality seemed to have a high fever. Its whole body turned red and became extremely hot. Wisps of white mist rose from the top of its head, its vision became unsteady, and even its body shrank.

"Customer complaint about swimming... cough cough, it's usable."

The controlling personality patted its head, restoring its language expression module to normal, and looked at Yuanxiang, saying:

"The data virus here has a flaw; it can only function for three days before self-destructing. I've just written a new program based on this. As long as it can be imported into the Book of Darkness, even if it can't completely eliminate the invading virus, your sister should be able to be freed from it!"

"Then what are we waiting for? Let's go!"

Genji was overjoyed. He had been worrying about how to deal with Takamachi Nanoha, who coexisted with the virus, after entering the barrier, but now that he had a solution, he was truly relieved.

"Um, Mr. Gengo, I wonder if I could reside in your transformed form?"

While returning the Moon Emperor Stone to Genji, the controlling personality asked:

"I am currently just a collection of magical energy that has been expelled from my original body, and my job is to merge with my master and assist him. So I hope you can let me hide in your Gaia Memory for the time being to avoid the battles that may occur in the future. Of course, I will also provide you with assistance."

"Of course, but I'm not sure if you can transform with me."

The boy recalled the prerequisites for Shotaro and Philip to become Kamen Rider W, and realized that this purely data-driven personality could be replicated by himself, who also possessed a physical body.

As Gensou spoke, he took out the blank Gaia Memory he had previously obtained from Daido Katsumi, looked at the controlling personality, and continued:

"Come on, give it a try. Can you come in?"

"Ah."

The controlling personality nodded, closed her eyes, and her body transformed into streaks of light, entering the blank memory. With a flash of dark light, a black 'U' appeared on the Gaia Memory. Genji then switched to the Dual Driver and was the first to activate this newly formed memory:

'Unison'

'Joker'