Hello, everyone! PHANTOMKNIGHTMARE47 here, with the fourth chapter of Kamen Rider Nebula. In this chapter, Nakashima and co. arrive in the universe of Rosario+Vampire, where they meet Tsukune Aono, the first Human to attend a school meant for Monsters, and the members of the Newspaper Club: Moka Akashiya (a Vampire), Kurumu Kurono (a Succubus), Yukari Sendoh (a Witchling), Ginei Morioka (a Werewolf), Mizore Shirayuki (a Yuki-onna), Rubi Tojou (a Higher Witch), and Fang-Fang Huang (a Yaksha). However, Kuyo, a member of the now-defunct Student Police is given a Zodiarts Switch to attack and try and murder Tsukune and co. in cold-blood, with help from a new Darkmare. Luckily, Nakashima transforms into Nebula, and gets help from a veteran Kamen Rider, Gentaro Kisaragi, AKA Kamen Rider Fourze! Can Nakashima/Nebula and Gentaro/Fourze save Tsukune and co. from the attack? Find out, in this newest chapter of Kamen Rider Nebula!

Disclaimer: Same as last chapter!

It shows the gang on the Starstreaker, with Blaine having a sparring match with Leo, with Blaine using a new W.O.O.H.P gadget, the Dragon Fountain-Pen Sword, while Leo used his dual swords, Musashi and Kamiizumi. Leonardo named his swords after Miyamoto Musashi, an unbeatable swordsman who invented the Nitou-ryu sword style, and Kamiizumi Nobutsuna, who created the Shinkage Style combat school during Japan's Sengoku-era.

"You're good at this, Leo." said Blaine, complimenting the leader of the Turtles.

"Thanks. That means a lot." said Leo, smiling a little. The two were engaged in an intense sword-duel, with the two sweating profusely. They then ended their match in a draw, and bowed to eachother in respect.

"Alright, everyone. We're about to reach our destination." said Leland, announcing that the Starstreaker was going to reach it's stop. Everyone then strapped in, as the Starstreaker then flew through a dimensional portal.

(Opening Song: "The Howl Towards Tomorrow" by JAM Project Plays)

[Instrumental]

It shows the various Kamen Riders: Ichigo, Nigo, V3, RiderMan, X, Amazon, Stronger, Skyrider, Super-1, BLACK, BLACK-RX, Shin, ZO, J, Kuuga, Agito, Ryuki, Faiz, Blade, Hibiki, Kabuto, Den-O, Kiva, Decade, Double, OOO, Fourze, Wizard, Gaim, Drive, Ghost, Ex-Aid, Build, Zi-O, Zero-One, Saber, Revice, Geats, and so on, as it then showed Nakashima.

[Tachiagare kedakaku mae sadame wo uketa senshi yo]

It shows Nakashima, with his friends, Daigo Kanezawa, Courtney Tezuka, Courtney's fraternal twin brother, Carter, and Taiga Segawa

[Sen no kakugo mi ni matoi kimi yo ooshiku habatake!]

It shows the group get to their feet, and are headed to a location, as the logo for Kamen Rider Nebula appears.

[Yami no jidai wo tsugeru kane ga tooku nari hibiku]

It shows Nakashima training in the local dojo, whereas Daigo is playing video-games, Courtney is practicing dance, Carter is doing motocross, and Masato is drawing.
[Tatakau tomo yo ima kimi ha shi mo osorezu]

It shows Nakashima's relatives, and some more of his school-friends. As well as the allies Nakashima makes in his interdimensional travels, such as Tsukune Aono, Kenichi Shirahama, the Agents of W.O.O.H.P, the Maximals, the Crystal Gems, Danny Phantom, Team Sonic, the Revenants, the Order Of Mata-Nui, Ruby's Group, the Avengers, the Justice League, U.A High-School Class 1-A, Inuyasha, the Elric Brothers, the French Miraculous Superhero Team, the Hazbin Hotel crew, I.M.P, and so on.

[Gareki no machi wo somete shizumu yuuhi ha kurenai]

It shows the members of the Multiversal Defense And Emergency Response Squadron, composed of Commander Leland Satsuma, Professor Jerome Broslowski, Dr. Jonah Smythe, Field Captain Genjiro Shimada, and Lieutenant Ayame Kanezawa.
[Aisuru hoshi no mirai wo mamoru tame]

It shows the Giganoidians, which were composed of the swordsman, Zankord, the war-general, Gextral, the assassin, Kevdar, the jester, Gyrax, and their leader, Giganidas.

[Oo kami no yaiba ha hito no ai]

It shows the people running, as the Zomborgs terrorize the people, until Nakashima manages to fend some of them off.
[Inori wo komete tsuranuke!]

Nakashima does the movements needed to transform, and says "Ectophase Activate!", as he then transforms into Rider Form.

[Tachiagare kedakaku mae sadame wo uketa senshi yo]

Nebula then fights against the Zomborgs in hand to hand combat, using various martial arts styles, until he slides a Grid-Card across the top of his belt, summoning a sword.
[Asu no heiwa he no ishizue to nare]

Nebula then slashes and slices through the Zomborgs with his weapon, cutting them down one by one.
[Atsuku nare ookiku sake ten ni sasageshi inochi yo]

It shows several other Riders, ready to help in defeating the Giganoidians, as Nebula fights Zankord in a sword-duel, and there are various other forms of Nebula's, brandishing a corresponding weapon.
[Yowakimono no tate to nare soshite sekai wo michibike]

Nebula does his Galactic Rider Kick on a Darkmare, destroying it in a single hit, before driving off on his motorcycle.

(End of OP)

Chapter 4: Space Heroes & A Vampire!

Location: The Woods Near Yokai Academy

Universe: The World of Rosario+Vampire

The Starstreaker then made a landing at the woods near Yokai Academy, and Nakashima then disembarked from the craft alongside Leo, Usagi, Clover, Stella, Martin, Java, and Diana.

"I can't believe that there is an ACTUAL school meant for monsters." said Martin, gobsmacked.

"I'm just as surprised as you are, bro." said Diana, gobsmacked.

"Now, we're looking for a young man named 'Tsukune Aono'. According to the data, he's said to be the FIRST Human to attend Yokai Academy," said Leo, looking at the datapad.

"A Human that attends a school meant for monsters? That's bizarre." said Diana. "And, a little worrisome, since the Monsters here could easily tear him limb-from-limb."

"He's got allies in the form of the Newspaper Club." said Nakashima, reading the datapad. "These allies include Moka Akashiya, who is a Vampire, Kurumu Kurono, who is a Succubus, Yukari Sendoh, who is a Witchling, Mizore Shirayuki, who is a Yuki-onna, Rubi Tojo, who is a higher Witch, Ginei Morioka, a who is a Werewolf, and Fang-Fang Huang, a Yaksha who is the son of a Chinese mafia boss."

"Looks like we'll be meeting up with 'em." said Leo, as he and the others headed to Yokai Academy.

Later, in Yokai Academy, we see a man with long, blonde hair and golden eyes in a cell. This was Kuyou, a kitsune who was part of Yokai Academy's Student Police. He believed that Humans and Monsters will always be enemies, no matter what. When he learned that Tsukune was a Human, he tried to have him burned at the stake, but an infusion of Moka's blood allowed Tsukune to defeat Kuyou. After his defeat, it was revealed that the Student Police was rendered defunct, with some of the members of the group not only being expelled from Yokai Academy, but also society, and sentenced to life in prison without a chance at parole for attempted murder of a student.

"Damn that Aono punk, he and his friends caused all of this!" Kuyou snarled, furious over his past defeat at Tsukune's hands. "If I get the chance, I'll slaughter that little fucker, and his friends. I'll also put their heads on pikes to prove that Humans should not only fear Monsters, but should serve Monsters!"

"And I can give you the power to destroy Tsukune Aono and his friends." said a voice, as a hooded figure then gave Kuyou an object in the form of a Zodiarts Switch.

"I'll level the Newspaper Club homeroom on top of the corpses of Tsukune and his friends!" said Kuyou, as he activated the switch, and turned into an orange-red colored nine-tailed fox Kaijin with cyan spots patterned in the fashion of the fox constellation, Vulpes, armed with a bow similar to the Ginga Ginrouken used by the Makai Knight, Rei Suzumura, AKA Silver-Fanged Knight ZERO. This was known as the Vulpes Zodiarts.

(Author's Note: Kuyou's Zodiarts form, the Vulpes Zodiarts, is based off of the Kyubi Malgum from Kamen Rider Gotchard mixed with Geats-Killer from the Geats & Gotchard team-up movie.)

"I will destroy anyone who gets in my way!" the Vulpes Zodiarts bellowed, with a psychotic look on his face.

Later, it shows a young man who looked like a bancho walking through a portal. This was Gentaro Kisaragi, a young man who resembled a juvenile delinquent, but had a really friendly personality to him. Gentaro was raised by his grandfather, Gorou, because his parents died in a car-wreck. When a disgruntled student of the school he started attending, Amanogawa High-School had turned into a Zodiarts, Gentaro used the Fourze-Driver to become known as Kamen Rider Fourze, and protected his school from any Zodiarts attacks.

"So this is a school meant for monsters?" said Gentaro, sounding similar to Mikey Simon from Kappa Mikey.

"Yeah, and someone must've given a student of Yokai Academy a Zodiarts Switch." said a voice on Gentaro's communicator belonging to Kengo Utahoshi. "We need you to find the person who has the switch, and stop them before they do any more damage."

"Gotcha." said Gentaro, as he ended the transmission. He looked to see Nakashima and the others.

"Holy shit! You're Gentaro Kisaragi, AKA Kamen Rider Fourze! The first-ever rocket ship-themed Rider!" said Blaine.

"Yep, that'd be me alright." said Gentaro, smiling a little.

"It's a pleasure to be meeting another of my Senpai Riders." said Nakashima, as he bowed in respect.

"Hello there. My name is Tsukune Aono." said a voice, as Tsukune walked up to them. "It's a pleasure to meet you."

"Hello there, Tsukune. My name is Nakashima Kazuma, and I'm a cyborg." said Nakashima, introducing himself. "This is Gentaro Kisaragi, and these are Asuka Shimada, Clover Andersson, Clover's mom, Stella, Blaine Darson, Lee Clark, Martin Mystery, Diana Lombard, Java, and Leonardo."

"Hello there." said the others.

"It's a pleasure to meet you all." said Tsukune, smiling a little. Suddenly, they looked to see several students running. The group saw a new Darkmare that resembled a merger between a saber-toothed tiger and a Japanese giant hornet with the Vulpes Zodiarts.

"Run now, you worthless little nobodies! Or spend an eternity in Hell, regretting the day you've ever crossed paths with us!" said the Vulpes Zodiarts. He then pulled back a 'bow-string' made of energy, and fired an arrow at some students who made a run for it.

Suddenly, Nakashima arrived as Nebula, and entered a fighting stance, ready to take on the two kaijin. "Not so fast, you assholes!"

"So, you're Kamen Rider Nebula." said the hornet/smilodon monster. "Let's see how well you fare against me, Hornetora!" He then extended some Baraka-style blades on his forearms, and fought against Nebula, swinging and slicing at him.

"You mean business. That's for certain." said Nebula. Suddenly, Gentaro arrived as Kamen Rider Fourze, ready to help Nebula turn the tide of battle.

"Let's do it to it, Nebula!" said Fourze, ready to kick some monster behind.

"You said it, Senpai!" said Nebula, as he summoned the CosmoSlasher. The two then fought Hornetora and the Vulpes Zodiarts. The Vulpes Zodiarts then turned his bow into a pair of dual short-swords, and fought against Nebula.

"Sorry, but we must away!" said Hornetora, as he spread four insectoid wings. "We'll meet again, Kamen Rider Nebula and Kamen Rider Fourze. Next time, you won't be so lucky!" with that, Hornetora flew off, as the Vulpes Zodiarts disappeared in a plume of flames.

"So, those creatures that attacked the school, what even were they?" said a voice belonging to Moka Akashiya, a Vampire that Tsukune had met on his first day of attending Yokai Academy. Moka had bubblegum-pink hair and green eyes, and wore the standard Yokai Academy girl's uniform. She also wore a choker that had her rosario on it, which was a rosary cross with a red gem in the center of it.

"That Japanese hornet/Saber-toothed tiger hybrid monster is a Darkmare, a biomechanical Kaijin created by the Giganoidians, a race of aliens." said Nakashima, explaining everything. "And that other monster was a Zodiarts, a monster based off of the 88 Western Constellations."

"In this case, the one we encountered was based off of the fox constellation, Vulpes." said Gentaro, with a serious look on his face. "He targeted Tsukune for some reason."

"My guess: it's someone who Tsukune had defeated after Moka infused him with some of her blood." said Martin, "But who?"

"I know who. Kuyou." said Ginei, scowling. "That rat-bastard tried to have Tsukune put to death for being a Human. Tsukune used his newfound abilities to clap Kuyou's cheeks and put him out of commission, thanks to Moka giving him an infusion of her blood."

"If Kuyou's out for blood, then it'll be up to us to make sure Tsukune lives to see another sunrise." said Nakashima.

Later, it shows Nakashima on his motorcycle, Stellar Chaser, while Gentaro was on his Rider Machine, the Massliger. Both bikes used hydrogen fuel-cells as an environmentally-friendly fuel source.

"KUYOU! HORNETORA! SHOW YOURSELVES!" Nakashima roared. Kuyou arrived with Hornetora.

"So, you've arrived. A Human who's part machine, and a Human who looks like a banchou but is a Mister Goody-Goody-Two-Shoes." said Kuyou, sneering. "Typical we've have more of you on campus."

"Why are you doing this, Kuyou!? Just WHY!?" said Gentaro, shocked and outraged.

"To get back at Aono and his friends for disgracing me in combat." said Kuyou, as he took out the Zodiarts Switch that he used to become the Vulpes Zodiarts.

[Last One]

With that, the Zodiarts Switch then changed it's appearance.

"Humans and Monsters were NEVER meant to co-exist! And I'll prove it, by leveling Yokai Academy to the ground with my BARE FUCKING HANDS! And I'll do it, right on top of the Newspaper Club's corpses!" said Kuyou, with a derranged, as he activated the Zodiarts Switch, and transformed into the Vulpes Zodiarts. This time, his bow-weapon looked like Cinder Fall's weapon crossed with Sononi's Condor Arrow. And he was sporting a cape themed after fox-tails.

Gentaro attached the Fourze-Driver to his waist, and inserted a large clear blue switch into the port on the far-right.

[Cosmic!]

Gentaro then flipped the four red switches on the Fourze-Driver.

[Three! Two! One!]

"Henshin!" Gentaro exclaimed, as he pushed the lever on the Fourze-Driver forwards, transforming into Kamen Rider Fourze. He then pressed down on part of the Cosmic AstroSwitch, and pressed the red button on top of it.

[Cosmic: On!]

With that, Fourze then transformed into his Final Form, Cosmic States, with his chest-armor resembling a touch-screen with icons for the other 50 AstroSwitches.

Nakashima then did the same transformation poses that Kohtaro Minami did to become Kamen Rider BLACK-RX mixed with Kohtaro's transformation poses as Kamen Rider BLACK.

[HENSHIN]

"ECTOPHASE ACTIVATE!" said Nakashima. There was a flashing strobe-light effect as Nakashima was clad in a suit of armor. His armor looked like Kamen Rider Revi Lion Genome, but his helmet was a merger between Lion Genome Revi, White Leo Revi, and Horan. His armor was colored like Ryukendo in his base form, but his helmet's optics were golden yellow in color. His belt looked like the Arcle worn by Kuuga, crossed with the Vital-Charger worn by BLACK.

(BGM: "COSMIC MIND" by Astronauts Plays)

"Uchuuuuuuu….." Fourze began, as he was about to shout his catchphrase. "KIIIIIIIIIIIIIITAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA!" He then pointed at Kuyou and Hornetora. "I'm Kamen Rider Fourze! Let's settle this, mano y mano!"

"I'm the child of the cosmos! KAMEN RIDER NEBULA!" said Nebula, as he posed like BLACK-RX. He then slid a new Grid Card across the top of his belt.

[Magma System, Activation Ready Go!]

With that, Nebula's armor turned red, orange and gold, with flame decals on his gauntlets and boots. His optics turned neon green in color.

"Time for things to really heat up!" said Nebula. He then scanned another card across the top of his belt.

[Magma Crusher, Equip On!]

In Nebula's hands was a battle-axe that was similar to the Sharpened Volcano Fragment from Team Fortress 2in appearance,but futuristic in design.

"Zomborgs!" Hornetora hollered, as the foot-soldiers in question appeared alongside some ninja-looking creatures. These were known as the Dustards.

"Let's do it to it, Gentaro-senpai!" said Nebula, as Fourze converted the Barizun Sword into a sword.

"You said it, Nebula!" said Fourze, smirking underneath his helmet. Nebula and Fourze then fought against the Zomborgs and Dustards, cutting down several of the grunts. Fourze then tapped an icon on his chest armor.

[Fire]

With that, the Fire AstroSwitch then appeared in Fourze's hand, and he inserted it into the bottom of the Barizun Sword.

[Fire!]

He then yanked on the side of the AstroSwitch, activating it's power.

[Fire On!]

With that, flames appeared on the Barizun Sword's blade, and he struck down several Zomborgs and Dustards with a single sweeping slash. Fourze then slashed the Vulpes Zodiarts several times with the flaming hot blade, as Nebula slashed and bashed Hornetora with the Magma Crusher.

"Damn you…! GODDAMN YOU!" the Vulpes Zodiarts bellowed, absolutely livid. "I am a kitsune, you worthless human! And I will not be belittled by the likes of you!"

"Sorry, but I can't let you harm any more innocent people, whether they be Humans or Monsters." said Fourze, determined to stop Kuyou from slaughtering innocent Monsters and Humans. He then converted the Barizun Sword into it's thruster mode, and put the Cosmic AstroSwitch inside of it.

[Limit Break!]

Fourze then launched himself forwards, taking the Vulpes Zodiarts with him into hyperspace.

"What the…!? Are…Are we in SPACE!?"the Vulpes Zodiarts blurted out, flabbergasted. Fourze then turned the Barizun Sword back into it's sword configuration.

"In and out!" said Fourze, as he removed the Cosmic AstroSwitch from the port on the bottom of the Barizun Sword's handle before plugging it back in.

[Limit Break!]

"Rider Great Galaxy Finish!" said Fourze, as he sent a cyan energy slash at the Vulpes Zodiarts, defeating him. He then deactivated the Zodiarts Switch. Fourze then returned to Earth.

Later, it showed Nebula fighting against Hornetora in close-quarters-combat, and he then slashed and bashed Hornetora several times with the Magma Crusher.

"Let's see you try and attack me from the air!" said Hornetora, as he flew into the air, and shot spikes at the lion-themed Cyborg Rider.

"You'll be surprised, jackass." said Nebula, smirking underneath his helmet, as he threw the Magma Crusher upwards, jumped into the air, and did a vertical slash with the Magma Crusher

"Eruption Crash!" Nebula bellowed, as he then sliced Hornetora in half, straight down the middle. Hornetora dropped out of the skies, and exploded before he touched the ground.

"Good riddance." said Nebula, as he walked to his bike.

Later, it shows Kuyou staggering off, having been defeated by Fourze, with the Zodiarts Switch he used to become the Vulpes Zodiarts having been deactivated. He then looked to see Tsukune and his friends.

"YOU! YOU!" he bellowed, as he charged at Tsukune using a box-cutter as a stabbing weapon. Tsukune dodged each and every one of Kuyou's attacks, and knocked him to the ground.

"That'd be more than enough out of your filthy mouth, jackass." said Ginei, scowling at the kitsune. "Your vendetta against Tsukune ends, right here, right fucking now."

"You think this is the end!? I won't stop until that filthy Human and you blood-traitors are dead! DEAD, YOU HEAR ME!?" said Kuyou, furious.

"That's enough." said a voice. It came from Tsukune and co.'s homeroom teacher, Shizuka Nekonome, who was a catwoman. And boy was she mad! "Kuyou, you have been warned numerous times about this, but this…this is the end. You are officially expelled from Yokai Academy!"

"You…you can't do this!" Kuyou blurted out, shocked and outraged.

"I can, and I will." said Ms. Nekonome, facing the disgraced kitsune. "Your sorry hide is not only expelled from school, but also society. And you're also being charged with hate-crimes and attempted murder." With that, several monster policemen arrived, and fitted Kuyou with handcuffs.

"YOU'LL DIE FOR THIS, YOU HAG!" Kuyou bellowed, as he was dragged off campus. "YOU FUCKING HEAR ME!? YOU'RE ALL GONNA FUCKING DIE FOR THIS!"

"Shaddup, you nine-tailed punk!" said an officer, who jabbed his taser into Kuyou's neck. Kuyou was then taken off campus in a police-cruiser.

"Good riddance to bad rubbish, as they say in London." said Kurumu, scowling. "Kuyou was a major piece of work."

"Yeah. And for what he's done, there's a very special cell waiting for him in prison." said Yukari.

Later, it shows Tsukune and co. onboard the Starstreaker, and they were amazed by the fact that the Multiverse Theory was for real.

"I can't believe that there are other worlds out there, aside from ours." said Tsukune, stunned by this information.

"Yeah, I was shocked at first." said Nakashima, admittedly.

"Alright, everyone, our next destination is the universe of Danny Phantom, where we'll be meeting the Human-Ghost Hybrid hero in his home turf." said Leland. Once everyone got onboard the Starstreaker, the craft then lifted off.

(End of Chapter 4)

(Cue Ending Song: "Vandalize" by ONE OK ROCK)

(It shows Nakashima/Nebula riding his motorcycle on a racetrack during a cloudy day)

Sound the alarm

Shatter me like glass

Covered in scars

But roses are coming through the cracks

Time that you killed

You promised to help me rebuild

It caught me off guard

Sound the alarm

Said you'd keep me safe, now you're tearing me down

Am I laid to waste, now that you're not around?

Come and leave your mark

Vandalize my heart

Fuck the pain away, my bed is in ruins

Need you in my veins, don't know how you do it

Come and leave your mark

Vandalize my heart

(End of ED)

Next Time, on Kamen Rider Nebula: Nakashima and co. arrive at Amity Park, Indiana, where they meet the Human-Ghost Hybrid hero, Danny Fenton, AKA Danny Phantom, and his friends and allies. They learn that a Darkmare is causing havoc in the town, and Nakashima teams up with Danny and co. to stop it. Meanwhile, Danny is recovering from having his heart broken by Paulina Sanchez, so Diana decides to comfort him. However, both Paulina and Dash attempt to get back at Danny and co. for getting them kicked out of school by becoming Dopants, so Nakashima teams up with the two-in-one detective Rider, Shotaro Hidari and Philip, AKA Kamen Rider Double! Can Nakashima/Nebula and co. help defend Amity Park from these monster attacks? Get ready to find out, in Chapter 5: Riders, Ghosts, and Detectives! Oh My!