Decade was surrounded by half a dozen villains. The Quirks of this group of villains either had close-range types or heteromorphic Quirks. Those with mutations wielded weapons. The villains that circled Decade were surprised by his transformation. There was a certain aura that the group couldn't explain. The kid wasn't a Pro but he was more serious about fighting. Little did they know, he already had experience in fighting against real villains.

One of the villains quickly dashed at Decade when he showed his back. Decade turned around and swung the Ride Booker through his chest, sparks flying from the attack. He slashed him once more before kicking him in the stomach.

"It's just one kid. We can take him!" a villain shouted. The other villains who waited for an opening attacked.

The Kamen Rider wasn't going to be in the middle and be attacked from multiple directions at once. He charged forth and swung his sword through a villain. Another villain tried to strike him from the side with a machete. Decade turned and slashed through him with ease.

Two of the villains rushed at Decade but he swiftly dodged and blocked their attacks as they ran through him. Decade transformed the Ride Booker into his gun form and blasted the two as they turned around.

The final villain left standing got a good punch on him, or should I say two. The villain was muscular with a pair of extra arms. The force of two powerful punches launched Decade across the fiery street and dropped the Ride Booker. The villain jumped in the air and dived towards Decade. The Kamen Rider dodged the attack and recalled the weapon to his right hand while using his other to summon a card and use it.

[AttackRide: Blast]

Decade shot up the last standing with a wall of bullets. However, they didn't seem to make him flinch. He smirked and shouted, "I'm bulletproof, kid!"

The Kamen Rider pulled out another card and inserted it into his belt.

[AttackRide: Illusion]

Two clones of Decade appeared next to him. The villain looked confused. The main Decade opened fire at the large villain as the two clones charged forward. The villain covered his face as one of the bullets hit his eye. The two clones attack him from multiple angles.

The villain has a hard time hitting one of them as they dodged his attacks. When one attacked, the villain focused his attention on swinging at the clone, who easily dodged the attack. This allowed the other to attack and the cycle repeats. The real Decade inserted his Final AttackRide card into his belt.

[Final AttackRide: D-D-D-Decade]

A trail of cards appeared in front of Decade and he jumped in the air. The cards followed him into the air. Decade flew into the card, each a portal to the back of the next one. The trail of cards led to the villain, who was busy attacking his clones. However, once the clones disappeared, the villain saw a large portrait of Decade doing a dive kick before the real Decade flew through it and kicked him in the head.

As the villain falls incapacitated, more come in from down the street. This group seemingly had a few more low-tier villains but one large villain caught his attention. He had a bull-head stood at 8ft (243cm).

"Should've expected them to have a full cavalry," Decade commented. The Kamen Rider pulled out a card and inserted it into the Decadriver.

[Kamen Ride: OOO]

Multi-colored medals fly around Decade as red, yellow, and green medals stop in front of Decade.

[Hawk! Tiger! Hopper!]

The medals then slam into Decade, transforming into Kamen Rider OOO.

[TaToBa! TaToBa!]

Kamen Rider OOO wore a primarily black suit with multi-colored lines going on different body sections. His helmet had a red hawk-shaped mold on the face. The eyes on the helmet were green. The arms were yellow with a pair of folded claws while the legs and lower torso were green. The center chest piece was a circle divided into three parts to match the corresponding armor section. The very top was a red hawk, the center was a tiger and the bottom was a grasshopper.

OOO counted seven of them, including the bull-headed villains. The villains tried to circle him. One tried to punch him with a rock-covered fist but he caught it and used the momentum to throw him down. A more feral-like villain tried to pounce on OOO but he swiftly turned and roundhoused kicked him.

A villain with a shotgun arm blasted OOO in the chest. His armor managed to protect him but the force of the blast knocked him up and the claws folded out. He cut through two villains. A villain wielding a machete tried to hack OOO but he caught the machete in between the claws of his left hand and twisted it so he let go. OOO then jabbed the claws into him, sparks flying at the point of contact.

"Dammit! I thought we were dealing with kids!" the shotgun-armed villain shouted. As he aimed his amr at OOO, Ojiro jumped in and whacked the guy away.

OOO glanced at the tailed martial artist. The bull-headed villain tried to strike at him. He exclaimed, "Ojiro!"

With a glance, Ojiro managed to dodge the attack by jumping back.

"It's you, right, Kimura?" Ojiro asked.

OOO turned to his classmate and said, "Yeah, it's me." The Kamen looked back at the villains. "Let's get rid of them and secure this area."

Ojiro nodded as the two heroes-in-training got in a readied stance. The bull-headed villain laughed and said, "I expected this to be an easy job. While our contractors deal with All Might, we deal with the small fry and I can see that you're anything but small fry!"

The two remained silent as the bull villain smirked. They charged in at the same time, with Ojiro using his tail to get ahead quickly. He was smacked out of the air by the bull villain. As for OOO, he tried to slash at the villain's leg but he was kicked in the stomach.

The tailed martial artist gritted his teeth and circled the villain, moving at a fast pace while striking at multiple points. As for OOO, he jumped onto the back and grabbed the horns in an attempt to either steer him or make him trip by the sudden unbalance. Before he could do anything, the bull villain grabbed OOO by the wrist and threw him at Ojiro, knocking both fighters out of the way.

"Guy is tough to crack," Ojiro grunted. "Do you have a card or something to give us an edge?"

OOO already had a card in his hand and said, "Way ahead of you." He inserted the card into the belt and initiated the transformation sequence.

[FormRide: Shauta Combo]

Medals circled OOO before three medals of varying shades of blue slammed into him.

[Sha-Sha-Shauta, Sha-Sha-Shauta!]

OOO changed to a more aquatic-themed armor set. The helmet had yellow eyes with a blue shark fin on the top of the head. The middle section had navy blue outlines with a white pipe connected from the wrists to the shoulders. The legs were a layer of rubber-like armor with suction cups. As for the emblem, from top to bottom, the animals that are represented are an orca, eel, and octopus.

The Kamen Rider rushed towards the bull villain. He clenched his hands together and tried to hammer OOO to the ground. However, his body changed into liquid in a split second. The villain gritted his teeth before constantly punching the Kamen Rider's now liquid body. OOO circled the villain in a rapid flow of water. He solidified behind the bull villain and used the Denkiunagi Whips. They were small pipes that were connected to his shoulders and hands. The bull villain turned as OOO swung the Denkiunagi Whips. He blocked with his arms the attack but the whips left an excruciating sting on his arms.

"Bastard!" the bull villain shouted. Ojiro wasn't idle as he struck the villain on the back with his tail. The bull villain tried to smack Ojiro but he quickly dodged the attack. With his back facing him, OOO cracked the Denkiunagi Whips again.

The bull villain grunted at the sting from the whips. He turned around to smack OOO but his body liquefied. He propelled himself above the villain and solidified. The Denkiunagi Whips extended to wrap around the villain and sent an electrical shock at him. Ojiro took a moment to jump high in the air and spin around multiple times to build momentum. OOO let go of the villain to allow Ojiro to strike him hard across the face, knocking him out.

"Think we cleared this area?"Ojiro asked as he panted. OOO transformed out of the Shauta Combo and into his base form.

"Hey, I see them! They're down the street!" a villain shouted.

"I guess not!" Decade exclaimed as he inserted a card into his belt.

[AttackRide: Machine Decader]

A motorcycle materialized next to Decade. It was white with a magenta stripe at the front. It had bars that resembled Decade's on the front and back. Decade got on the motorcycle and patted Ojiro to sit next to him.

"Come on, it's not worth fighting the small fry!" Decade shouted. Ojiro nodded before getting on the motorcycle. The Kamen Rider drove off in the Decader and escaped the villains' line of sight.

"Where did you get the motorcycle?" Ojiro asked.

"I don't know where it came all. I only know that I have it, and can use it," Decade explained.

Decade decided to head to the edge of the dome that was closest to him. He spotted the exit, which was as wide as the street that crosses into it. The Kamen Rider shouted, "Alright, let's get out of this fiery joint!"

Before Decade could escape with Ojiro, a large pool of fire appeared before them. Decade drifted to a stop. Fire began to erupt around them. Decade drove around the fire and rushed to the exit. The fires around them grew more intense as more suddenly appeared in front of them.

"It looks like they have the controls of the fire!" Ojiro pointed out.

"Perfect!" Decade snarked sarcastically. The Kamen Rider knew that his armor could withstand a blast of fire like that but he Ojiro wouldn't. It was too late to turn around so he sped up as fast as he could. He pressed on the throttle to outpace the rising fire. The entrance was right there. Just before Decade could cross into the exit, fire erupted beneath them. The fire knocked them out of the bike but in front of the entrance. "Damn, that was close!"

Decade got up and helped Ojiro stand on his two feet. He shouted, "Come on! We're outta here!"

The two of them exited the building and tried to catch their breath.

"That was... way too close for my liking," Ojiro admitted while catching his breath.

"At least we're out of the fiery pit of death," Decade said as he stood up straight.

"So, what now?" Ojiro asked.

Katsuro looked around and found themselves in between two other zones. The Flood Zone consisted of a large lake with a water slide full of rocks. The other was a rocky mountain area. In the center was the main gathering area and a group of villains gathered there.

"Looks like the villains are still gathered at the center of the facility," Decade squinted his eyes to get a clearer look on what they were doing. "From what I can tell, it looks like Aizawa is holding his ground against them."

"We should help him!" Ojiro suggested with an eager look on his face.

"I'd rather get out of the way of the professional," Decade said. "Besides, our classmates are still scattered across the place. It will be better if we all rendevous before assisting Aizawa. We'll have strength in numbers."

"Good point," Ojiro said as he realized his brashness. "Where to?"

"Let's go to the mountains," Decade said as he turned to face the Mountain Zone. "The large lake seems to empty. I don't anyone who would be in there."

Decade and Ojiro walked through a small trail on the Mountain Zone. They heard an echo of a fight going on from the distance so they knew that some of their classmates were in the area. Ojiro looked up to see a large boulder falling onto them. It was thrown at an angle that didn't collide with the side of the mountain, meaning it was almost silent. The Tailed Martial Artist whacked Decade out of the way with his tail as he dove back. The boulder crashed onto the trail, dividing the two students.

"Ojiro! Are you alright?!" Decade asked.

A large, round villain with large arms began chucking smaller boulders at the students.

The two students dodged out of the way. Ojiro looked at the side of the mountain and saw that it wasn't too steep to just climb over it safely. He shouted, "I'll try to make my way to the top and stop the boulder-chucker!" Ojiro dodged another boulder.

"I'll cover you!" Decade shouted as the Ride Booker at the villain.

The Kamen Rider opened fire at the large-armed villain. The bullets weren't hard enough to penetrate his skin but it was enough to irritate him. When Ojiro noticed the villain turning to face Decade, he began to climb up. Ojiro used his tail to propel himself higher when he reached the height of his launch. He would then use his tail to find a smooth surface to propel himself even higher. Within two launches, he was already at the top and he smacked the head of the large villain. Once Decade saw Ojiro at the top, he continued on the trail.

A villain with shovel hands popped out of the wall beside him. This villain had hands similar to a shovel found on a power shovel construction vehicle. He used them to knock Decade down the mountain. The villain shouted, "Eat shit!"

Decade fell and rolled down the hill, allowing the armor to absorb the rough tumbling. Decade landed on ground level, groaning in pain as he took a second to recollect what had just happened. The excavator villain dug into the mountain once more. Once Decade stood up, the villain dug up from behind, jumping out of the ground and punching him with his large, shovel hands. The Kamen Rider quickly recovered and tried to use the Ride Booker to shoot him down however the villain was quick enough to dig down once again.

"Later loser!" the villain said as he dug away.

Decade groaned and said, "An evader and taunter. What an annoying combo."

The Ride Booker transformed into the sword and the Kamen Rider waited for the villain to pop up like a mole in a carnival game. There was a brief second of the ground shaking before the sound came from a distinct direction. Decade was too slow to turn as the villain already popped out of the ground. The Kamen Rider turned and swung the sword but the shovel villain blocked the attack.

"Too slow, kid!" the villain shouted before punching Decade in the chest.

The villain dug away as Decade groaned. He pulled a Rider Card.

[Kamen Ride: Kuuga!]

Decade transformed into Kuuga. The villain didn't allow the student to take a break. This time he appeared below his feet and uppercutted him. As Kuuga landed, the villain took notice of the Kamen Rider's new appearance.

"Weren't you just pink?"

"It's magenta..." Kuuga groaned as he pulled out a FormRide card.

[FormRide: Peagasus]

Kuuga transformed into his Pegasus form, granting him access to the Pegasus Bowgun.

"Oh, you transform! How neat! But tough luck kid! Experience beats flashy effects!" the shovel villain as he dug into the ground. Kuuga waited for the moment to strike, his senses heightened to near-severe effects. However, Kuuga's powers somewhat influenced him to control these senses to the best of their ability. This is the edger he has over the villains, the twenty-something odd Riders at his disposal, and their experience somewhat affecting him.

Kuuga detected the shovel villain below him before the ground even shook. He waited until the last second to dodge out of the way of the shovel villain's path, the Bowgun aimed right at his chest. The villain was shocked to see that Kuuga was anticipating his attack and was met with an arrow projectile in the chest. It didn't pierce his skin but left a sting. The Kamen Rider rolled back and fired as many arrows at the shovel villain before transforming back into Kuuga's base form. Kuuga charged at the villain before jumping in the air, extending his leg to perform a Rider Kick. The force of the kick sent him flying, crashing into the wall and knocking him out.

The Kamen Rider looked up to see that he was at the bottom of the mountain. He groaned in annoyance as he summoned a Rider card.

[Kamen Ride: Agito]

In a bright flash of light, Decade transformed into Kamen Rider Agito. His armor was similar to Kuuga's except it was golden. It had its differences. For one, the chest piece had a black gem in the center with silver sides on the hips. The shoulder pads were black with a silver pointed outline. The crown on his helmet had higher peaks. Agito materialized another card and inserted it into the belt.

The first thing Agito did was summon an AttackRide card and insert it into his belt.

[AttakRide: Machine Tornador]

The card summoned Agito's motorcycle which was red with a golden secondary color. It then transformed into a long hoverboard. Agito jumped onto the Tornador and used to reach the top as fast as he could.

At the top of the mountain, Ojiro struggled against a group of villains. The tailed martial artist expected Kazuhiro to be behind him, or at least following the path leading to this open area. He was unaware that the Kamen Rider had been separated from him. When Ojiro got to the top, he was quickly surrounded. Two villains suddenly charged at Ojiro but the hero-in-training held his ground. He swiftly strikes them with a kick from the leg and a flick from the tail.

"It's just one kid! How're we struggling!" the villain with large hands shouted.

A flying villain with bug wings tried to swoop in and tackle Ojiro. The UA student turned to smack him with his tail. Before a villain tried to rush into the fight, he felt a shadow cast over him for a brief second. He looked up to see Agito on the Tornador flying above them.

"Up there! It's another one of those brats!" the villain shouted. Agito jumped off and landed next to Ojiro.

"Sorry, got held up by another villain," Agito said.

"It's fine, let's clear this area," Ojiro said.

Agito nodded before the two students charged at the group of villains. The heroes-in-training knew that these were the low-paid grunts with no experience except maybe punching a sandbag. Their victory over the last group of similarly leveled villains gave them the confidence to rush in. The large-armed villain lifted his arms and tried to slam them onto Agito. The Kamen Rider flipped back and narrowly dodged the attack. Ojiro jumped over Agito from behind and smacked the large villain in the face. The villain staggered back, allowing Agito to pull out a Rider Card.

[Final AttackRide: Ag-Ag-Ag-Agito!]

Two pairs of horns popped out of Agito's crownpiece. A bright yellow projection of Agito's symbol materialized beneath his right foot. The light swirled beneath his boot before the Kamen Rider jumped. Agito extended his leg and kicked the large-armed villain in the chest. The force and strength of the attack sent him flying off the mountain. Agito transformed back into Decade.

"That should be all of them at least in this area," Decade said.

"There could be more coming at us from any corner," Ojiro said.

Decade groaned in frustration. He said, "Looks like whoever organized this attack wanted to do as much damage as possible. "

The Kamen Rider already faced a situation like this when Hundred invaded his world. This time there was no way out of it. He made it this far with Ojiro so as long as they stick around and reunite with other students they will have better chances of living through this. In the distance, they saw electricity sparking in the distant. The two students glanced at each other, knowing who exactly it was. They quickly made their way to the other side of the Mountain Zone.

A villain held Kaminari while the latter was dumbified through the use of his Quirk. This villain held Kaminari by the back of his collar while holding his hand out in front of his head. Electricity coursed through his hand but Kaminari was too obvious to the danger. Yaoyorozu and Jirou were hopeless in this situation. The villain as aware of Jirou's Quirk so the ball is in his court. Decade and Ojiro observed the situation from above, behind he villain's back.

"He'll live, right?" Decade asked.

"His body can tolerate so much electricity. Anymore and his brain might be permanently fried," Ojiro said.

From below the villains taunted the girls. He said, "If you two come quietly I'll let this idiot go, okay?"

Ojiro narrowed his eyes and gritted his teeth. The tailed martial-artist turned to Decade and asked, "I know it's dumb to ask but don't you have anything to help? Decade materialized an AttackRide card.

"Of course I do."

[AttackRide]

Decade jumped down and pressed his belt together.

[Invisible]

Decade disappeared as he landed. The villain jolted as he turned his body halfway. He tried to maintain eye contact with Joru and Yaoyorozu, reminding them that he'll hurt Kaminari if they did anything. To run home this point, he moved his hand closer to Kaminari's face.

"Alright, you bastard! Show yourself! I'm going to fry his brain so that he'll live the rest of his life as a goddamn vegetable!" the villain shouted. Yaoyorozu and Jirou glanced at each other, unsure what was going on.

Ojiro leaned in as his hand gripped the ledge of the cliff. Suddenly the villain felt his wrist getting grabbed on his wrist. Decade suddenly became visible, revealing himself to be the one holding on his wrist. The Kamen Rider had the Ride Booker aimed at his face and blasted him. The villain lets go of Kaminari, prompting Decade to open fire at the villain. Decade riddled the villain with bullets but no discernable bullet wounds were visible. It's almost as if the bullets were intentionally meant to incapacitate or stun

Now that Kaminari was free from the villain's grasp, the girls took action. Jirou shouted, "Kimura! Get out of the way!" Her back plugged into her boot. Decade nodded as he moved out of the way to allow Jirou to blast a powerful soundwave to push the villain into the wall. Ojiro sighed in relief before jumping down to meet with the others.

"Thanks for the save, Kimura. I'm glad to see the two of made it out okay," Yaoyorozu said.

"Feelings mutual," Decade said.

"Is it just you two?"

"Yeah," Ojiro said as he huddled with the others. "We were in the fire dome. There were villains all over the place and the guy controlling the fire made the situation worse, so we had to get out of there."

"Hopefully whoever teleported us did so sporadically, because if they teleported us in set numbers..."

Decade cuts off Yaoyorzu and said, "We won't know until this whole thing blows over. At the very least, all the attention was on us since we were fleeing from the dome."

Ojiro nodded to ensure Kazuhiro's words.

"Of course, it's just... scary to think that we're suddenly trusted into this position," Yaoyoorzu said.

"Yeah, last week we were just training our Quirks and now we're up against villains that want to kill us," Jirou said.

"I get it," Decade said with a flicker of understanding. "Let's just say that I ran into villains just like that, and that was before I even knew about my powers."

Everyone looked at Decade when he made that comment.

The ground shook as an object was launched out of the dome. Ojiro shouted, "What's going on!"

Yaoyorozu quickly calculated the trajectory of where the object was launched from. She created a telescope and looked through it, aiming it right at the plaza. She saw All Might.

"It's All Might! It looks like he probably took out a villain," Yaoyorzu said.

"Probably a strong one if he needed to use that much strength," Jirou said. Decade's mouth slightly gaped as he saw a huge hole in the wall. This was the first time he saw All Might's strength firsthand.

"Wait, if All Might is here then that means the faculty must've gotten word of this attack," Ojiro said.

Yaoyorozu nodded and said, "Looks like this nightmare will soon come to an end."

Decade turned to uSJ and gazed at the facility from the top of this mountain. Even though this incident lasted an hour or less, it felt like an eternity. While he got away without a lot of scratches, there was a few moments were he was caught off-guard. This incident sent a shiver down his spine as he knew Hundred would be significantly worse than this loose band of villains.

As Decade and the others leave the scene, a man wearing glasses with a light brown hat and coat watches from a distance. He said, "Curse you, Decade! Your powers couldn't die off with you. I guess we'll see if this one can actually put good use to your powers."

A portal materialized behind the man as he turned around to walk into it.

Author's Corner

To avoid writing just the plot of My Hero Academia, I decided to have Kazuhiro teleported to one of the various spots in USJ. Relatively speaking, the whole incident probably lasted around an hour to an hour thirty, so that's why it's hyper-condensed into one chapter. Again, this series is based on Kazuhiro's perspective so I did cut off a lot of the important tidbits and fluff. I was thinking of adding one more chapter to include more fights again, looking at how long the actual USJ incident lasted, it probably wouldn't make sense timeline-wise.

Anyways, the next chapter will be the epilogue of USJ and set-up for the next major MHA arc.

Response Corner:

Guest (from chapter 5): Again, I have to use a translator so sorry if it comes out wrong or if I misunderstood your point. I do want to write more stories with Kamen Rider and My Hero Academia, it's just that I'm not sure if I want to write more Kamen Rider x MHA stories. There are already other writers out there who already do these stories where both exist in the universe.

An0therName (from chapter 1): I wanted to write a story about how a mundane person gets roped onto a big adventure in another world. I thought it would be an interesting angle if Kazuhiro/Decade was an outsider to both the various worlds of Kamen Rider and the world of My Hero Academia. Besides, most seasons of Kamen Rider, even anniversary ones, aren't familiar with pre-existing Kamen Riders since they're not common knowledge. Like in Fourze, Kamen Riders were just urban myths and legends.

XenonKirito (from chapter 6): I decided to make the Rider Machines as AtttackRide cards. I mainly did it because Decade used an AttackRide card to transform his bike into Kaixa's bike. Also, don't forget that the powers and abilities of the 23 Kamen Riders (Kuuga to Revice) also extend to their equipment, so anything that's part of their kit is at Decade's disposal.