Tokyo Ghoul / Monster Musume / One Punch Man / Parasyte / Overlord Crossover: Tokyo Destroyer

Chapter One: Dark Genesis

…

Alright, people. This is perhaps my most ambitious story to date, and I don't know if I can pull it off. A large part of that is gonna depend on you. If it's well received, that will encourage me. If not…then not.

Yes, I'm using some OC's in this story, specifically some characters I developed for some original stories of mine on fictionpress under the pen name of nightbreaker57. Sue me.

If you're interested, I'll send you a link.

…

I don't own the Tokyo Ghoul, Monster Musume, Parasyte, One Punch Man, or Overlord franchises, of course. Just sayin'.

…

And before I start, I'd like to thank my friend darksymphony777's Youtube review of my "Monster Musume" fanfic, "Papi's Flight." This story takes up more or less where the other left off. Perhaps…perhaps it'll explain some things as it goes along. Or at least, hint at some explanations.

Once again, if I've played fast and loose with certain things, oh well.

…..

Chapter One: Dark Genesis

It has been theorized that, given the nature of quantum mechanics, it is possible for every single particle in one's body to be simultaneously and spontaneously teleported instantaneously through the quantum substrate onto the surface of another planet, resulting in one's waking up on another world, whole and unharmed. Of course, this is highly improbable, so highly improbable that one need never be concerned about it, for such an event is so unlikely that it will not take place before the projected end of the universe.

However, it should be noted that "improbable" and "unlikely" should not be confused with "impossible."

….

August, 2019: The orbital stations had been placed at high alert, but only the absolute top echelons had even the sketchiest idea why.

Several extreme deep-space monitoring stations, originally designed to find and track potentially dangerous asteroids, had ceased to communicate. This much was known to the upper portion of the brass.

But what only a very, very few knew was what the final scan from the last station had shown: what looked like the figure of a man, garbed in red coveralls, surrounded by a nimbus of golden light, glowing as brightly as a star. He was flying straight for the viewer, almost as though to fly headlong down the very eye of the automated camera.

That was the last thing that satellite had reported.

…

Then: A young Rize Kamishiro found herself in the midst of a forest unlike anything she'd ever seen. Are these redwoods?—she asked herself, stepping between the city block-sized trunks, clambering over the huge knobs of roots projecting from the ground. She mused that, had one the time and inclination, one could almost carve oneself a simple, medium-sized dwelling just from the titanic knee of wood—it was wood, wasn't it? It looked almost like iron—thrust up through the forest floor's soil. She looked up. The tops of the trees disappeared into the vastness of the sky; they formed a shade against the sun, so that the entire area below them was drenched in sun-dappled shadow. She placed a hand against one of the trunks, and felt a very faint vibration from within. Were these even trees? There was an almost cathedral-like hush about the place…she couldn't hear any birds singing.

Where was she? Just a moment ago, she'd been in her bed; she was still wearing her nightclothes. But this certainly wasn't Tokyo, or any place in Japan, she was sure. Where was she, and how did she get here?

Something drew her attention to a clearing up ahead. Making her way there (there was surprisingly little undergrowth, with a carpeting of soft green moss covering most of the forest floor), she saw someone sitting on a rock up ahead, someone garbed in an odd looking red outfit, like coveralls. His back was turned to her; he appeared to be completely unaware of her.

The ghoul moved closer. This should be an easy kill…but she no sooner reached the edge of the forest than he spoke. "I know you're there. You can come on out from behind that tree."

Well, alright then. It would still be an easy kill; he didn't look any older than she was. But something about him wasn't right.

A ghoul's sense of smell, like their sense of taste, is very highly evolved and sensitive. That was one way ghouls found their prey: even at night, with their masks on, they could nonetheless zero in on their target by sense of smell.

But…this one…didn't smell like food. In fact, she couldn't really smell him at all. That was odd.

She stepped out from behind the root. "How did you know I was here?" No point in hiding.

"I know lots of things, Rize Kamishiro." Rize started; how did he know her name? And he still hadn't turned around… "I know who you are. I know what you are: a ghoul, an eater of human flesh.

"And I know what you're suspecting: this isn't the planet where you came from. This isn't Earth.

"And I know you aren't dreaming. This is real. Altogether too real."

….

"Are you getting this?"

"Roger, ground. All these satellites have been in a straight line for Earth, coming from deep space. Any ideas what it could be?"

"Negative." Roger Corman could sense there was more to it than he was getting, but now wasn't the time to pursue it. He had his hands full, heading the United Nations deep-space exploration station. It was their job to scan for potential threats, "threats" meaning incoming asteroids or comets that could impact the Earth. To that end, the station, and its subsidiaries, had been armed, completely against pretty much every nuclear arms treaty there was or had been, with high-yield nuclear missiles, the "hammers," as they were called, each with an estimated yield of a minimum of thirty megatons. Of course, in the vacuum of space, much of the bombs' destructive power was lacking, since there was no atmosphere to carry a blast wave. So, each of the missiles had been surrounded with a thick sheathing of lithium hydride, which would, upon detonation, expand outward in all directions with enormous force, turning each hammer's warhead into omnidirectional particle accelerators. Properly placed, such explosions should shatter incoming meteors along their fault lines, breaking them up, and / or deflecting them away from a collision course with the planet.

And of course, like so many things, the key words were, "properly placed." Also, thought Corman, there was the little factor of time involved. They had to be able to see the incoming rocks in time to launch their missiles. Otherwise, there would be little point.

So it would help if I knew what I was looking for, he thought. Something entering the system, on what appeared to be a collision course with Earth…and Ground wasn't sharing with anyone what it was.

Well, maybe it didn't matter. He only had to find the damned thing, and to that end, directed his people to focus every 'scope and sensor they had on the projected vector of the incoming whatever. Whatever it was, he and his people would find it, and find it in time to launch the nukes.

Whatever it was, they'd blow it out of the sky.

…..

"Where did you say I am?" Rize was trying to comprehend it. One minute she'd been in her bed, now, it seemed, she was…who knew where.

"It's called Akkad VI. I don't know where that is in relation to your world…from what I'm seeing in your mind," the pupils of the strange boy's eyes dilated in and out as he looked at her, and Rize shifted uncomfortably. What was he seeing, anyway? And how? "From what I can see in your mind, there's nothing familiar, no marker stars, no familiar constellations. I've a notion you've come a long, long way."

She shivered. Rize had always considered herself tough, but… "But how? How did I get here?" Still moving closer. Just a little closer. At this range, he wouldn't be hard to kill…

Except there was something strange about him. It wasn't just that he didn't smell like food. There was something else, something…intimidating about him. Rize Kamishiro wasn't used to being intimidated by anyone or anything. She found the experience wholly unpleasant. "You seem to know who I am. Who are you?"

"I'm Ben. And I'm not food." He smiled a sarcastic-seeming smile. "Though you're welcome to try, if it pleases you." His sheer self-confidence was not only annoying, it was beginning to erode her own. That just simply would not do.

She whipped out her kagune, angling in on his back. He couldn't reach back there; no matter what, one shot to the kidneys would take him out…

Her kagune glanced off his back as if it were a solid wall. Worse; Rize's kagune could have gone straight through soft brick or mortar. But here, it was as if she'd run into a steel firewall.

Again and again she tried to spear her kagune into him, and again and again she failed. He simply sat there, watching her out of the corner of his eye, a small smirk on his face. It was infuriating.

She tried harder and harder, whipping her kagune at lightning speeds, the tips cracking as they broke the sound barrier. It didn't matter. She tried wrapping her kagune around him, trying to lift him off the ground, to slam him into it. Always tenderize the meat before you eat it. But try as she might, she couldn't so much as lift him an inch off the ground. She tried wrapping her kagune around his face, to suffocate him…

He permitted this, but no matter how hard she squeezed, she couldn't get anything like a satisfying grip on him. It was as if he were a statue fixed to the ground.

Finally, she stopped, breathing hard, retracting her kagune, but keeping ready for his inevitable retaliation. Though she wasn't sure what she could do about it…he seemed beyond her power to harm…

"Finished already? I guess I could wait for you to get your second wind."

"Don't," she began, "make fun of me."

"I'm actually not, believe it or not." He glanced skyward, and, for some reason, she felt a chill run down her spine. "This has actually been a welcome diversion." He sighed. "Now, I'm afraid, it's back to business as usual." He looked towards what she supposed was the northwest. She followed his gaze, and gasped to see hundreds of fast moving pinpoints of light arcing up over the horizon and heading their way…

"Don't worry," he said, "just stay close to me. That is, if you want to live. If you don't, well, your choice." Too stunned to do anything other than comply, she moved in closer, to where she was almost touching him.

The missiles slammed in faster than the eye could follow…and detonated against an invisible shield around them both, the light and the thunder blinding and deafening her. She closed her eyes and put her hands up against the side of her head, a maneuver too late to keep out the sound of the explosions. Are those nukes?—she wondered. If they weren't, they were the next best thing.

The barrage kept up, and she fully expected whatever was shielding them to give way, and that any second would be her last. Even her ghoul physiology couldn't repair being blown to atoms by atomic warheads.

But whatever it was held, and the barrage began to die down, finally ceasing. She carefully removed her hands from her ears and looked around; the ground was still heaving, and the surrounding countryside was a glowing wasteland. Where there had been a mighty forest, now only pools of lava remained. "What…was that?"

"That was the Federation's latest attempt to kill me, Rize. There've been scores of others. This one wasn't even the most creative." He snorted. "They never learn."

"But…how did we survive?" She looked around at the shattered ground, the very rock she'd first hidden behind no more than a slumped pile of glowing molten lava.

"We survived because I'm the most powerful telekinetic in existence. If I don't want their stupid missiles to get through, they won't." He gestured at the skies, the clouds overhead drawn by the massive surge of energy, lightning flashing between the clouds as they sought to equalize the charges. The winds had already long surpassed any hurricane level on the Earth she'd come from, and she could feel the shudderings in the ground, as it continued to quake from the missiles' fury. "Nor will those bolts. Nor the wind nor rain, nor radiation." He turned to her. "You're welcome," he said.

….

"A family reunion!" exclaimed Miia excitedly, grasping her hands in front of her. "How wonderful, darling! I'll begin cooking right now…"

"Uh, that won't be necessary, Miia." Kimihito grabbed her hands in his. Even though she'd been studying, he still didn't fully trust her cooking skills. "It's just a cousin of mine coming over for a visit. And another cousin from Tokyo." Miia's cooking had proven to be, er, exceptionally bad in the past. As a lamia, Miia didn't have any taste buds to speak of, so she couldn't tell when something went awry with her cooking. "So it's really not that big a deal." He thought. "I will have to alert Ms. Smith, of course, and I've already prepared my cousins for, uhm…" How best to put this?

"Liminals, you mean." Rachnera was just then coming into the room. The others hadn't yet joined them.

"Well, yes. One's coming over from City Z, and I don't think they actually have any liminals there. Not every city has officially joined in the Treaty, you know. Not that they're opposed to it," although some are, he thought to himself. They'd recently had a thoroughly unpleasant experience with Kasegi, the phony director, who'd inadvertently revealed the existence of anti-liminal groups. "…they just haven't gotten around to it yet." I hope my cousins are prepared for the sight of my houseguests, he thought further. "I'm going down to the bus station to pick him up. Then to the train station…."

"Bus station?" echoed Rachnera, "Doesn't he have a car?"

"Er, no. Unfortunately, he has, uhm, fallen on some hard times lately, so I understand. Anyway, I'm going to have everything delivered shortly. Man, it's a good thing Ms. Smith told me that I could write off expenses like that." Then he saw Miia's expression and hurriedly added, "Now, Miia, don't be like that. You know I'm glad you're all here. But it does take some doing, keeping everything going. I know you're doing everything you can. But you do have to admit, we've a lot of mouths to feed."

"Yes, and Papi's is one of the biggest," muttered Rachnee. Kimihito couldn't disagree; the harpy did eat quite a bit. But… "Now, Rachnee, be nice. You know she can't help being what she is."

"What she is, is a pest," grumped the spider woman. "She's so…so…damned cheerful all the time. It isn't natural."

"Well, anyway," Kimihito rubbed his hands, getting back to the matter at hand, "the groceries will arrive shortly. Thank God we found a supermarket that delivers. You two can put them up; I'll go down to the bus station and pick up my cousin."

"What's his name, by the way, darling? I don't recall ever hearing you mentioning any of your family."

"His name's Saitama."

….

Saitama hated riding the bus. He'd much rather have come under his own power. But Silver Fang and Genos had been right. There was no point in alarming people, and a man falling out of the sky would certainly do that. He still had to work on his landings.

He was somewhat excited about seeing his cousin again. It had been a long time, and they both had a lot of catching up to do, no doubt.

The train: Kimihito's other cousin shifted uneasily in his seat. This would be the first time seeing his cousin since…well, the first time in a very long time. He'd have to engage in a bit of deception, but his friends—that is, with one rather vociferous exception-had been right: he could use some time off, some time to reconnect with his past. He hoped he could pull it off.

His seatmate noticed him shifting. "Uncomfortable?"

"Only…a little." He paused, unsure as to how to continue. Ever since a certain event in his life, he'd felt out of place pretty much everywhere he went. And, he was always careful. He had to be. "This…is my first time away from Tokyo in…a long while."

His seatmate nodded in understanding. "Mine, too. I understand. I, too, am traveling far from home this day. I…" and here, he looked out the window at the passing scenery. "…I felt like I could use a change of pace."

"You sound like you've had your share of troubles," said Kimihito's cousin.

"You might say that." He looked back at his companion. "I don't believe we've been introduced. I'm Shinichi Izumi. Everybody calls me Shinichi." He stuck out his hand. His right hand.

Kimihito's eye-patched cousin shifted and reached out with his hand. "I'm Ken Kaneki. Everybody calls me Kaneki."

….

"So, Sai," said Kimihito, "what's with the getup?" The two were in Kimihito's car, driving to the train station.

"What, you mean this?" Saitama indicated his yellow suit with its attached cape. "I'm a hero now. A hero for fun."

"You champion the cause of fun?" Kimihito didn't understand.

"No, I mean I fight evil for fun. I find it's most enjoyable. Unfortunately," he grimaced, "it's not very financially rewarding."

"Well, about that…I do know some people. There's these eight brothers I've recently come to know, and several of them have mentioned positions open at their jobs. But, uh, you might need to lose the jump suit for the interviews."

"But I'm a hero!"

"Who's applying for a job. Come on, Sai, dress for success. Just for the job, surely you can do that."

"Well….I don't know…"

Change the subject. "When did you decide to shave your head? The last time I saw you, you had a full head of hair."

"Oh, that. Well, once I decided to become a hero for fun, I began training. I trained so hard all my hair fell out."

Kimihito looked surprised. "Wow. You must've trained pretty damned hard."

"I had to. City Z was always getting attacked by monsters."

"Er…monsters?"

"Gruesome things. One was the epitome of all the pollution people have dumped into the water. But I took him out with one punch." He sighed, clenching his fist and staring at it. "Actually, that's become kind of a problem for me lately."

"Uh, Sai? About monsters…I did tell you about my houseguests, didn't I?"

"What? Oh, yes. The liminals. I've never met any—we don't have any in City Z—but I'm really interested in them." He smiled an uncomplicated smile. Typical Sai, thought Kimihito, with a secret grin. That childlike fascination. I think he'll be okay.

I just hope my other cousin doesn't freak out. After all, he's a student at the university there; he's probably never had anything unusual happen to him.

…

Deep space: the alerts and alarms had been ringing like bells for the last hour. Corman was beside himself. "Exactly what," he began dangerously, "are we dealing with?"

The young lieutenant squirmed in his seat. He hated being put on the spot like this; he had no more idea what was coming than his superior. But he did know something, something that turned his face as pale as a sheet. "Sir, whatever it is, it just blasted through Ceres. I checked and double-checked. There's no doubt: there's nothing but an expanding cloud of rubble where it was."

Corman was shocked. Ceres was—had been—the largest asteroid, easily five hundred miles in diameter. And the intruder had gone through it? Why? What was it, a neutron star? A black hole? But no, either of them would have sucked in the remnants of the asteroid. "Get me Central Command. And sound full alert; arm every warhead we have." He grimaced. "We may need them."

…..

A universe away, on another Earth: "We got lucky," said Ben Sinclair, known on this world as Typhon. He paced back and forth like a caged lion. "We got very, very lucky. If things had gone just a little differently…"

"But they didn't," soothed Lindsay, lounging comfortably on one of the soft futons placed around the living area of what most people called the "Palace," but which these two simply called "home." Her green, hooded cape splayed out around her. The artificial moonlet they'd created, which they'd named "Olympus," had, in time, become their natural habitat, and, lately, their base of operations. "Things didn't go differently, Ben. We were able to slingshot Chaos into that galactic black hole. Surely, not even he could come back from that."

"Don't be so sure." Ben's voice was grim. "It's true, it would take infinite power to escape from a black hole, especially one of that size. But from what we've been able to determine, Chaos seems able to draw upon his alternate selves from all the universes in the multiverse. And there's an infinite number of them. So, he has infinite power, at least theoretically." He paused. "Has…has Dr. McLemore…learned anything more about…?" And even without telepathy, Lindsay knew what he was going to say.

"No, Ben. Tori's…condition…hasn't changed."

"Where…where is she now?"

"Outside. Ashley's with her."

When the five of them had found themselves somehow transplanted from their old universe into the one they currently inhabited, both Tori and Ashley had suffered what appeared to be total amnesia. Ashley's memories, however, had come back, with time and help from Lindsay's—Mentalla's—telepathic power. But Tori's seemed to be gone for good.

And that was tearing Ben up. Because, in another life, he and Tori had been as one flesh, inseparable.

Until now. Now they were separated by the greatest gulf there was: she no longer remembered him. It was like she'd died, and another person now inhabited her body.

Oh, she acted the same, responded the same as the "old" Tori had, but her memory loss made him a stranger to her. And for all his seemingly unlimited power, there was nothing he could do about it. "I…I mean…good. Ashley will…I mean…help her, be a good…influence on her…" He didn't really know how to proceed.

"Ben," said Lindsay softly, "don't do this to yourself. You aren't responsible for what's happened to her."

"I know that, Lindsay," he said, just as softly, "I just wish I could believe it."

….

"Ah. Earth, once again." The towering entity lifted his Mask of Envy to the cloudless sky. "I had truly thought I'd never see it again."

"Does it displease you, my Lord?" asked Albedo, looking about this, to her, new world. As usual, she was ready, willing, and able to lay waste to it, should her Lord and her love express the slightest wish that she should do so.

"No. I am surprised, however, that I did not find myself reincarnated into the physical form I wore here. Pleasantly surprised, of course, but surprise is surprise." The being known and feared in another world as Ainz Ooal Gown turned his grimacing Mask turned first one way, then another. "Tokyo. It has hardly changed since I knew it." The traffic rushed heedlessly past them, of course; this was Tokyo, and strangeness was usually ignored.

Usually.

"I sense great danger approaching. Albedo, we must learn more."

….

Then: Akkad VI: "I am becoming rather tired of their incessant attacks," grumbled Ben. Rize clustered closer to him. Perhaps they had more in common than she'd originally thought.

"Then why do you tolerate them? You just finished saying you were the most powerful telekinetic in the universe. And I've seen you don't have to fear their weapons. Why even let them attack?"

"I thought I was doing them a favor, that in time they'd come to see I wasn't the threat they thought I was. Then…"

"They're like the people of the Earth I come from: terrified of anything or anyone who's different. They…they're like, I don't know, lions, cowardly lions, who've locked themselves in a cage of their own making. Even if you opened the door for them, they wouldn't leave." She moved a bit closer to her, sat beside him on the small ledge by the stream. Although still a young girl, Rize was coming to realize that hers would be a path different from that of anyone else.

Perhaps a powerful friend…would help.

He struggled visibly, clenched fists up against his chest, seeming to wage a war within himself. Then, a strange gleam came into his eyes. "You," he whispered, "are right."

High orbit: the captain of the United Federation starship Haila sat in his command chair, surveying the results of their latest campaign. They'd laid atomic waste to the entire planet; there hadn't been a single nook or cranny untouched by their nuclear fury. It was Akkad III all over again, even though that had been before his time. Please, Deity, if you're out there, if you really exist, let this be all. And let it be the last time we have to do this.

"Uh, sir?" The nav officer's voice sounded hushed and awed simultaneously. No doubt he was just as affected. They all were. The destruction of a whole planet…just did something to people, no matter how necessary it had been.

"Status?"

"The planet's…gone, sir. I mean, the surface…it's radioactive slag. I don't think it'll ever support life again. Ever."

"Life signs?"

"None, sir. I, I don't see how…" He trailed off.

"Sir!" The science officer jerked up from his station. "PK meters just went off the chart!" He checked his instruments. "Uh…they just went offline, sir!"

Horrified, the captain watched as a single, intolerably bright spot of light blossomed on the surface of the ruined world. But how? We gave it everything we had… "Helm, get us out of here! NOW!" The great ship began to turn. The spot of light was growing with inexorable, juggernaut-like speed. "Signal High Command! Get us out of here!"

To be continued…