Kuoh Academy, Occult Research Club

"Now your threats have become meaningless, or rather, you devils are at a disadvantage in this situation…"

"No way… how did this happen…"

Hiiro turned off the phone and put it away, as Rias watched the broadcast and was stunned to realize that humanity itself had effectively become an enemy of the devils.

"You're joking, right…?"

"Genm Corporation, Yggdrasill Corporation… Japanese Ministry of Health, and the World Health Organization… we've gotten ourselves into a whole lot of trouble…"

Issei and Toma were shocked to realize the sheer scale with the involvement of the Japanese Ministry of Health and WHO, and the magnitude of the people they had made enemies with.

"In answer to your earlier question, I have no intention of cooperating with you or following you, I will save the patients the way I've always done."

Hiiro left the seat and turned to leave.

"Hey, wait!" Eito stopped Hiiro, who muttered in annoyance.

"What? I have a surgery right now."

"You've got to be kidding me! What the fuck is this! Fighting the devils!? What kind of nonsense is this!?"

"I think you're mistaken. You're the ones who chose to start the fight."

Then Hiiro took out his Game Scope and started talking.

"This stethoscope-like device is called a Game Scope, and it can be used for communication in addition to examining the game disease…"

"Don't tell me…"

"The Ministry of Health is aware of the conversation we just had, and since your master has just threatened me and there is no room for discussion, the Ministry considers the devil faction to be a complete enemy."

"No way… so… the one who caused the humanity to become enemies…"

"The Ministry of Health was considering forming a cooperative relationship with you in order to combat the Bugsters and stray devils if you are willing to work things out peacefully and without threats… but you chose to become our enemy."

Hiiro was about to put his hand on the doorknob to leave the room.

MIGHTY ACTION X!

"Henshin!"

Gashat! Gachan! Level Up! Mighty jump! Mighty kick! Mighty! Mighty Action X!

Taka! Tora! Batta! Ta-To-Ba! Tatoba! Ta-To-Ba!

"RAAAAAAAHHH!"

"DIEEEEEEE!"

"Eito! Ryoichi!?"

Ex-Aid and OOO tried to attack Hiiro from behind. However…

.

.

.

.

.

.

.

.

.

.

RESTART

""AAAAAAAAAAAAGHH!""

At the announcement, Ex-Aid and OOO, who had been trying to swing Gashacon Breaker and Medajalibur from behind Hiiro, were suddenly blown through the window and out of the old school building.

"Sorry for the trouble."

"Don't worry, I've seen this coming…"

"Kamen Rider… Cronus…" Toma muttered in fear as he saw Kamen Rider Cronus suddenly appear behind Hiiro.

"W-who are you!?" Rias exclaimed.

Cronus then turned to introduce himself.

"I am Masamune Zaizen, President of Genm Corporation, also known as Kamen Rider Cronus…"

"President… Zaizen…"

So muttered Koneko, the only one among them who knew Masamune in person.

"You… what did you do to Eito and Ryoichi just now… they are both suddenly…"

"Buchou, that Kamen Rider Cronus has the power to stop time called Pause. Maybe they are blown away earlier because they were attacked in the stopped time."

"Really!?"

"Stopping time…!? That's so overpowered!"

When Rias and Issei heard Toma's words, they exclaimed in shock.

"You bastard! You've got to be kidding me!"

"A side character and a villain defying the Protagonists!?"

GEKITOTSU ROBOTS! Gashat! Gachan! Level Up! Mighty Action X! A Gacha! Gekitotsu Robots!

Taka! Kujaku! Condor! Ta~ja~dor!

Ex-Aid transformed into Level 3, while OOO transformed into the Tajador Combo.

"Eito! Ryoichi! Cease your actions at once!"

"Buchou! Don't worry, I'll take care of those two bastards this time!"

"You'll pay for defying us devils!"

Both of them shouted at Hiiro and Cronus.

"Oh my, oh my, you've got no idea what you're getting into… but now that you're here, you're going to be our test subjects for our newly developed Gashat."

"A new Gashat?"

At Hiiro's question, Cronus handed Hiiro a large maroon Gashat.

"This is…"

"Yes, the Gashat Gear Dual β, a new type of Gashat designed for use against Para-DX. When I was on my way to help you through Game Scope, I rushed to bring you the one I had just finished adjusting, its level is 50…"

"50…"

"It's a good opportunity, put it to good use, Hiiro-sensei."

"…Alright."

Hiiro jumped out of the window, followed by Cronus, and stood in front of Ex-Aid and OOO.

"Last warning, I have an operation coming up, so I honestly don't have time for you two. Get out of here."

"Screw you! I don't give a shit!"

That one sentence was enough to turn Hiiro against him.

"Are you kidding me…? You… you don't know what you're doing with your life!" Hiiro snarled and turned the dial on the Gashat Gear Dual β.

TADDLE FANTASY!

…Let's going king of fantasy! …Let's going king of fantasy!

Then, a reddish-purple game character that looked like an armor themed after a demon king and a dragon appeared.

"Skill Level 50. Henshin!"

Dual Gashat! Gachan! Dual Up! Taddle meguru RPG! Taddle Fantasy~!

As soon as Hiiro inserted the Gashat on the Driver and pulled the lever, Hiiro's form is transformed to that of a normal Brave. The next moment, the armor was attached and Hiiro transformed into the Brave Level 50 Fantasy Gamer.

"This is… Level 50's power…"

"Is there something wrong, Hiiro-sensei?"

"…No, there's nothing wrong with me at the moment."

"I see… well then!"

"Yeah, commencing malignant Rider removal surgery!"

And with that, Brave readied his Gashacon Sword and headed towards OOO.

"I'll take care of Ex-Aid then."

Gachan!

Cronus deployed his Bugvisor II in Chainsaw Mode and lunged towards Ex-Aid.

"Don't feel cocky about just getting to Level 50!"

On the other hand, OOO deployed his wings and flew through the air, firing projectiles from the air that resembled peacock feathers at Brave.

"How about this!?"

"What!?"

Brave immediately summoned a barrier to block OOO's attack.

"HAH!"

"Huh!? What!? My body—GAAAAAAAAAAAAAAAHHHH!"

Next, Brave used his telekinetic powers to smash OOO into the trees, the walls of the old school building, as well as gymnasium.

"T-this is ridiculous… no way… this can't be happening!"

SCANNING CHARGE!

"DIEEEE!"

OOO unleashed the OOO Bash, a finisher activated by scanning three Cell Medals on his weapon, at Brave. However, at that moment, Brave vanished from his place with an instantaneous movement and avoided the attack.

"Huh!? Where's that bastard go!?"

OOO turned to look around.

"Huh!? Ryoichi, look up!"

"What the!? Waah!"

When Rias yelled at him to look up, there was a huge energy ball floating in the air, conjured from Brave's left hand.

"This is the end!"

"AAAAAAAAAAAAAAAARRGHHH!"

Brave threw it towards OOO right below. As soon as it impacted, it blew up not only OOO, but also the surrounding trees, the building, and gymnasium with an explosion.

"W-what power…"

"That magic power… maybe it's a Demon Lord's level… no, maybe more… why would he have such power?"

Akeno and Rias muttered as they looked at Brave.

Meanwhile

"I didn't expect this much… thankfully we are in the Game Area… but using this kind of power in the real world would be a disaster… so this is Level 50…" Brave also muttered in surprise at the scale of his own power.

"Hahahahaha… that's pretty good, Hiiro-sensei…"

"President, are you done with the other one?"

"Yeah, it wasn't even a fight…" Cronus said, remembering the fight he had just had with Ex-Aid.

A few dozen minutes ago

While Brave was one-sidedly beating up on OOO, Cronus was also one-sidedly beating on Ex-Aid, who was using a Level 3 Gashat.

"Son of a bitch!"

"Is that all you got?"

Cronus caught Ex-Aid's punch, and kneed him hard on the gut.

"Shit! Why can't I, the OC Lord, beat the villain!?"

"Hehehehehe… OC Lord, you say? Don't make me laugh, you're too weak, I can afford it without using Pause…"

"DON'T SCREW WITH ME!" Ex-Aid shouted, ready for another attack.

However…

Kimewaza! CRITICAL SACRIFICE!

"AAAAAAAAAAAAAAAAHHHHH!"

Cronus swept his right hand vertically and fired a circular saw-shaped energy from the Bugvisor's chainsaw toward Ex-Aid, and upon impact it blew him away and canceling his transformation.

"AAH! DAMMIT! Why…"

With Eito crawling on the ground, Cronus retrieved the Gekitotsu Robots Gashat.

"Y-you! That's my Gashat!"

"Your Gashat!? As if, this is a Gashat I created! Scumbag like you isn't even allowed to touch my Gashats!"

Present

"Well, now that I've accomplished my other goal, I'd better get going."

Cronus showed the Gekitotsu Robots Gashat to Brave and turned to leave.

"Wait a minute! …Are you... are you really going to make enemy of the devil faction!?" Rias demanded.

"We have no intention of attacking you but if you take any action that threatens the lives of humans… we will not tolerate it."

"…You think you can really defeat the devils…?"

At that moment…

"Buchou, look out!"

"Kyaa!"

At the same time, red and pink energy arrows rained down on the place where Rias had just been.

"What happened…" Rias muttered.

"This is a declaration of war, devils."

"Well, there you have it."

Sigurd and Marika appeared out of nowhere and talked to them.

"Who are you people!?"

"Kamen Riders Sigurd and Marika… could it be!?"

"This is our first time meeting, Rias Gremory."

Minato and Sid untransformed.

"Whoo! Oppai! This is a sight for sore eyes! Don't you think so, Toma!?"

"Yoko Minato and Sid!? So Zangetsu and Duke are really them!?"

When Toma saw the two of them, he didn't show any particular reaction to Issei's perverted comments as usual, and just exclaimed in astonishment.

"I am Yoko Minato from the Yggdrasill Corporation, and I'm here today to inform the devil faction of the intentions of President Takatora Kureshima, CEO of Yggdrasill Corporation."

"…Which is?"

"We, Yggdrasill and humanity, will not tolerate any devil that engages in bioterrorism within human society. If any devil invades Yggdrasill-controlled lands, including Zawame City, we will annihilate them with impunity in the name of humanity's defense… that's all."

"No way…"

"Rias Gremory, there is currently no room for negotiations between humanity and the devils or other supernatural beings, but don't forget that this situation was created entirely by you for underestimating humanity…"

With that, Cronus spread energy bullets all over the area, creating a cloud of dust, and when the dust cloud subsided, the Riders had disappeared.

"…They're gone…"

The Game Area disappeared and the destroyed buildings were instantly repaired.

Toma asked, "Buchou… what's going to happen now…?"

"…In any case, for now we need to ask for the Demon Lord's instructions."

Rias, who had experienced a day in which the very fabric of the world had been turned upside down, and had lost all of her energy, could only answer in that way.