Crossover anime/manga, can you be my immortal companion for life?

Crossover Anime, Can You Be My Immortal for Life? Author: Snake's Dream

The mentally ill man, Kerry, mistook a stranded ancient god larva for a nuclear-radiated fish and made it into sashimi.

He unexpectedly gained an immortal body and the ability to turn others into immortals and revive them around him.

"Excellent! I've seen this episode before. The next step is to forcibly bind beautiful girls to me and keep reviving them around me!"

Haha! Come and let me see what kind of world this is! Is it Oregairu, Kyouka, or Lonely Rock?

Shiki, Higurashi, Shiki Party, Zetsubou Sensei, Junji Ito manga...

Kerry: ?

It's okay, maybe there are some elements from the other world here? Let me see!

Squeezing the ward, transformation, Saya no Uta.

Caw! I don't want to see!

A sorrowful Kerry glanced at the teammate list one last time.

Kazuma Sato, Kazuto Kiritani, Nohara...

Kerry: ?

Seeing these newborns, Kerry was furious and decided to find some more beautiful girls to start a new team.

Shoko Toyokawa, Motoyo Nagasaki, Nina Izare... Great! It seems like this time, the teammates all seem to be normal people!

...

Ten years later in the basement, Kerry: ?

Chapter One: My Struggle

"I! I really want to become human!!"

In Tokyo at night, a girl's voice could be heard from an old pedestrian bridge not far from a subway station.

"They're always so lovey-dovey, but they'll behave themselves after a couple of days of work!"

Suddenly, a loud response came from under the bridge.

"Huh?" The blue-haired girl on the bridge was startled by the sudden voice amidst the rushing traffic, while another short-haired girl who had just mustered up her courage was startled by the voice.

Seeing her companions' reactions, the blue-haired girl puffed up her cheeks in anger, feeling a bit like she was being arrested during a chuunibyou episode. Like a cute little blue octopus, she peeked her head out from under the overpass, letting the wind blow through her hair and black headband, creating a shimmering effect under the moonlight.

She wanted to see who was replying.

However, what she saw was a figure driving an illegal two-wheeled motor vehicle without a helmet, speeding away as the motorcycle sped off. The only striking feature was the blue and white hospital gown on the other person's body, which was reflecting the light under the vehicle's headlights.

...

Our city is bustling with people.

Letting the wind lift his collar and the buttons of his hospital gown tug at his clothes like Spider-Man pulling a train, Kerry sped along on his motorcycle.

Could you please spit me out?

Upon hearing the voice in his mind, Kerry couldn't help but marvel.

"These are indeed fresh ingredients; they even talk after you eat them!"

Upon hearing Kerry's reply, the voice in his mind became furious.

[You lunatic! Wasn't your soul from another world? I already told you, I'm not seafood! I'm the offspring of an ancient god! My mother's corpse turned into waves, and I was born on your shores! And you took advantage of my weakness, listening to the sounds of your entire city and learning about your civilization, and then you roasted me alive!]

"What? You think I've never played Bloodborne?! I didn't expect your underwater culture to be so comprehensive. Are there also a lot of fish in Bikini Bottom who criticize Hidetaka Miyazaki?"

The voice in Kerry's head was clearly enraged by Kerry's words.

Have you ever seen any ordinary seafood that can talk?!

"Of course you're not ordinary seafood. Aren't you a mutant fish that's been exposed to nuclear radiation? This is Japan, as I know. This makes much more sense than you being from the underwater city of R'lyeh."

Kerry's words left the voice in his head speechless for a moment.

After a short while, the voice in Kerry's mind rang out again.

Let me see your memory! What's wrong with you?!

Hmm... You really aren't a soul from this world. Because of your outsider nature, you're often plagued by strange things. Let me see...

When you came into this world, your body was 15 years old, and you were already in a mental hospital when you arrived.

When you were 16, something called the World Modulation System appeared in your mind. That thing modified your brain, which explains why you can communicate with me and don't get like your kind who get their brains boiling when they hear our language.

That thing allows you to freely rewrite the world, so you decide to add "cultivation, incubators and magical girls, magnetic field rotation, spiral force, Valhalla, chakra, the Trisolarans, subspace, anti-magic ninjas, cosmic throne, cosmos, light of the soul, gourmet cells, dueling spirits, Cthulhu, SC..." and then set yourself as the strongest in the world with a fixed power level.

So, you think that once someone breaks through the impossible and defeats you, you'll hand over control of the modulation system to them, and that witnessing such a scene would make dying worthwhile?

At this point, the voice gasped as if it hadn't actually gasped before continuing.

[At 17, your mind matured through experience, and something calling itself a love simulation system appeared in your head. It automatically loaded modules for all the languages ​​in the world, and then you randomly picked a woman to simulate it. On your 178th attempt to simulate a global communist future, that thing called the system ran away?]

The sound was already a little numb.

Then, when you were 19, something called the "Otherworld System" appeared in your mind, saying that you could gain more abilities simply by constantly hypnotizing others, and gave you the initial reward of hypnotizing 10 people. So you immediately ran away from the hospital to the United States.

Just as the system was disappointed that you didn't like Asian tastes and wanted something more Western, it discovered that you wanted to use the hypnosis slots to hypnotize the president during his speech, and then use him to introduce more politicians, bureaucrats, and capitalists, all of whom you wanted to hypnotize so that they would stop supporting certain countries that were invading, while you sent troops to Africa and Mexico to wipe out local forces and help them stabilize and develop.

The system was so enraged by your fully functional but utterly devoid of Slaanesh's spirit that it fainted and left?

[The reason you've escaped the mental hospital is because you're calculating the time and planning to go to Nara to witness the first male shooter in the Japanese server being killed and take photos as a memento??]

The voice, which had been filled with righteous indignation, gradually softened, and finally broke into a relieved smile.

what can i say?

Byd is truly amazing.

I've seen your memories. Do you really crave the power to change the world?

"Can you please shut up? It's so noisy!"

What if I could give you that power?

"Godfather, is it really true?"

You're always thinking about everyone else!

By this time, Kerry had reached a sparsely populated roadside and stopped his motorcycle, which had run out of gas.

And then that sound rang out again.

However, you don't actually need my help. Since you can digest my flesh and blood without dying, you can obtain an immortal body.

Hearing the voice in his head, he answered calmly and unhurriedly.

"What? Isn't this a reference to our Onmyoji? Remember to cite the source next time you use it. Don't assume I'm a Deep One just because you looked like you came from Innsmouth before I roasted you!"

In 15th-century Japan, a legend circulated in the Hokkaido region about a woman who mistakenly ate mermaid flesh and lived for 800 years without dying or aging.

It seemed that because Kerry's answer was too abstract, the voice in his head seemed to pause for a moment before he could reply.

[Hehehe, but simply not dying isn't enough, so I've also arranged a few companions for you, and you'll all be tormented by endless hunger. Consider this a curse for killing my body...]

It seems that thing is really reading Kerry's memories, and as the amount of data it reads increases, its way of thinking and tone become more and more human.

As the voice faded, Kerry felt as if some information had been inserted into his brain.

The message was telling us that he was invincible; even if killed, he would be resurrected in some random corner of the Earth. He was invulnerable, and even if injured, he would heal instantly. However, he would suffer from the torment of hunger, yet remain unable to die. Even if Earth and humanity were to perish, he would wander the universe alone...

This is a curse, and it also represents the resentment that caused this curse to exist. Since you are full of thoughts about everyone, then go and protect these people. If one day humanity disappears from this world, then you will have to endure endless torment and loneliness.

Kerry looked around and, after the sound disappeared, gently touched his chin.

"Sigh! Could it be that what Dr. Asagami said is true? Why do I keep having these strange auditory and visual hallucinations, and why are the upper and lower parts connected?"

I really hope I can recover soon. Otherwise, it's so strange that a normal person like me is locked up in a mental hospital, and I have to outwit the caregivers just to get out of the house.

"No, this outfit is too conspicuous to walk around Tokyo in."

As he spoke, Kerry glanced down at his chest, where a sign reading "Department of Psychiatry, University of Tokyo Hospital" still hung. Below it was a line of Japanese text in red: "This target is an extremely dangerous mental patient. Citizens who spot this target are requested to call immediately..."

Just as Kerry was pondering, he spotted a slightly tipsy office worker walking under a streetlamp not far away, clearly having just finished a social engagement. Kerry's eyes lit up immediately.

Kerry walked over openly, and as he approached, one could still hear the complaints of the overworked office workers.

"Damn it! These carefree generations! Just because they're not married and don't feel pressured, they dare to talk back to their seniors and quit when they're not satisfied! They don't even consider seniority or scholarships and loans! They don't understand how hard it is to find a job these days!"

He just dumped all the work on the new guy, and he dared to embarrass me in front of so many people! What a jerk!

I don't know if it's because of Japan's unique culture of "all talk after drinking," but the office workers are shouting quite loudly right now.

Just as this office worker was walking forward, holding his breath, he saw Kerry walking towards him.

"It's those brats wandering around everywhere again! Don't you guys have jobs? Won't you get a lecture when you go home if you don't even have any social obligations? You're ruining Japan's future!"

Upon seeing Kerry, the office worker seemed to still be feeling the resentment from before, and couldn't help but say a few more words.

"Hello, may I borrow a piece of clothing?" Kerry asked very politely, thinking to himself, "Aren't Japanese people supposed to dislike bothering others?"

"Stop joking around! Are you here to cause trouble?"

Kerry's behavior seemed to anger the other party, who stepped forward and raised his hand as if to shove him.

This is commonplace in Japan. In this version, even the notorious yakuza who dared to kill a parliamentary candidate is now just a stray dog ​​on the street. He might be arrested on the spot by the Metropolitan Police Department for loudly asking the price of something at a convenience store.

Even if everyone is filled with negative emotions due to the immense pressure of life, they won't actually resort to violence. At most, they might make provocative gestures. If the other party gets provoked and attacks, then retaliating would be considered self-defense. In fact, even without retaliating, one could still extort money from the other party.

Similar tactics include touching someone's head from a distance, which in practice is like sending a head-touching emote when playing Naruto, taunting in Shadowverse, saying "weak" in LoL, or sending a question mark in the game. Countless young people have fallen for this trick and been extorted after beating up their opponents.

However, because this kind of thing happens so often, not many people are falling for it anymore, so it's just a matter of picking a fight. Usually, when this happens, either the two sides just touch each other in the air for a while and nothing happens, or one side swallows its anger and leaves.

However, it's clear that Kerry is no ordinary person.

"I only need to say one word and you will give me the clothes."

Looking at the office worker waving his arms up and down in front of him like a Pokémon wall-clinging puppet, Kerry spoke calmly.

"Huh? Who do you think you are? Just one sentence? You brats have been ruined by light novels! Do you think there's anything supernatural in real life? I was the vice president of the karate club back in Waseda..."

Kerry pulled a gleaming dagger from his pocket and pointed it at the office worker's chest.