The class watched as Decade and Shoji walked into the building. All Might was interested to see how Decade would perform against the other students. Aizawa told him to be extra observant of his performance.

"Hm, it's funny how he tried to call me out by checking on Young Midoriya but here he is showing concern for Young Kimiura," All Might thought. He watched Decade and Shoji slowly move through the building. The other students were curious to see what kind of fighter Decade is. "Though, I am interested to see what he can do. His powers are somewhat similar to One for All, given that they are passed down. They have their differences for sure but I'm curious to see what he can. I'm curious to see the powers of these Kamen Riders."

Shoji took point, using his Quirk to identify the location of Shoji and Hagakure. Decade watched his back, his sword ready to be swung.

"I wonder how Tetsuya and Kaneko would react in this position," Decade thought. He smirked beneath his helmet. "Probably freak out."

After a few moments of silence, Decade asked, "Anything?"

"I'm hearing a single set of footsteps on the fourth floor," Shoji said. "Telling by the pacing of the steps, it could be Ojiro, the one with the tail."

"I'm guessing the invisible would want to stick to a hiding spot and ambush us."

"She probably is. We just have to take our time," Shoji said.

The two of them carefully made their way to the fourth floor. After making a turn around the hallway, Shoji stopped. He formed eyes and looked down the hall.

"This was the last area I heard the footsteps. Ojiro could strike from-" Shoji said. Ojiro suddenly dropped from the ceiling. He used his tail to try to strike at Shoji but the tentacle-armed student managed to block the attack. As Ojiro landed, Decade took point and inserted a card into the belt.

[AttackRide: Blast!]

The Ride Booker transformed into a gun. Decade opened fire, which created projections of the Ride Booker firing as well. It created a wall of bullets that Ojiro had to jump over to dodge. Ojiro realized that he was too out in the open and immediately ran into an intersecting hallway.

"I'll go after Ojiro. You should try to find the bomb," Decade said. "If he leads me to the bomb, I'll shout and we rendevous before going into the room."

Shoji nodded before the two of them split up.

"Woah, he transformed his sword into a gun! That's the type of stuff you see in video games!" Kaminari exclaimed.

"Yeah, and the fact that he summoned it instantly adds to it," Mineta said. His costume consisted of a purple body suit with yellow gloves and boots. He wore a white bowl-shaped shorts.

"Do you think you create something like that, Yaoyorozu?" Ashido asked.

"I can if I can understand the components and material that make it up. However, I don't think I create something instantaneously like that," Yaoyorozu said.

Decade came across an open that led into a room with a few construction materials stacked up and lying around. He looked through the corridor before entering the room. He dashed into the room and glanced around for Ojiro. Once he looked up, Ojiro was diving down ready to strike with his tail. Decade rolled under him before turning around as Ojiro landed. As Decade fired the Ride Booker, Ojiro ducked into a few crates.

Ojiro smacked the crate to send it sliding into Decade. The Kamen Rider quickly sliced through the crate, splitting it in half vertically. Ojiro lunged at Decade, who quickly ducked under him. Decade quickly turned around, the Ride Booker now a gun once more. Before he could fire, Ojiro knocked it out of his hands with his tail before striking him with a powerful punch.

The Kamen Rider was knocked into a pile of crates with metal bars stacked on top of them. The metal bars fell and rolled on the floor. A Rider card appeared in his hand. Since everyone was giving it all during training, then Decade wasn't going to hold back either. He inserted it into his belt.

[KamenRide]

"Hopefully, this meets everyone's expectations!" Decade shouted. He pushed the Decadriver together. Ojiro stepped back, wary of what was about to happen.

[Kuuga]

Decade transformed into Kamen Rider Kuuga. His armor morphed into Kuuga's. As Kuuga, he wore a red chest piece with shoulder pads. The chest piece was molded to resemble muscle. He wore red gauntlets with golden cuffs. He had a similar red cuff on the ankle. His kneepads were golden with a red gem. His helmet was black with a silver mouthpiece with a mold of a bug mandible. He had large red eyes with a golden crown. Ojiro quietly gasped at the sudden transformation.

"Woah, he transformed into another form!" Ashido exclaimed.

"I wonder what makes this one different from the other one," Kirishima said.

All Might watched Kazuhiro carefully. This is the second time he saw him transform into another Kamen Rider. The only other one he is aware of is Gaim. From what he can tell, was more oriented to a duel-wielding fighting style. He wondered what Kuuga was going to bring to the table.

Ojiro kept his distance as he and Kuuga circled the room. He didn't know what to expect from this new form so he had to remain vigilant. Kuuga rushed in to make the first strike. Ojiro dashed forward and spun around to build momentum. Ojiro used that momentum to swing his tail at Kuuga, who grabbed his tail and used it to toss him away. Ojiro landed on his feet.

Kuuga rushed in to punch Ojiro but he managed to quickly swipe him with his tail. After knocking Kuuga to face his back, Ojiro tried to strike him with a kick but the Kamen Rider turned around and blocked it with his left arm. Now open, Kuuga charged forward and kneed Ojiro in the stomach before switching legs and kicking him.

"Hm, so in this form Young Kimura is a close-range brawler who can keep up with an educated fighter like Ojiro. Based on what Aizawa told me, Kimura has no real combat experience aside from that incident," All Might noted in his head.

"Such display of manliness from sides! They seem so evenly matched that it's so hard to root for one of them," Kirishima said.

"My money's on the guy who has the cards," a student wearing a tape-shaped helmet said.

"It looks like his fighting style changed the second he changed forms," Yaoyorozu noted.

Back at the arena, Kuuga and Ojiro kept exchanging blows. Ojiro turned his back and used his tail to quickly smack Kuuga multiple times. They were quick but light strikes. Kuuga swiftly grabbed his tail and spun him around multiple times before slamming him into the ground. As Ojiro flew in the air, Kuuga kicked him to send him flying towards a wall.

Ojiro got up, panting from the hard hits he had just taken. Kuuga stood tall albeit trying to catch his breath. Ojiro smirked before getting himself in a stance. He began to see the gap between him and Kuuga. It wasn't as large as the one between him and Todoroki but Kuuga and his powers are on a different league. Still,

The tailed martial artist dashed towards Kuuga once more with the determination to defeat the Kamen Rider. Ojiro managed to block the attack with his before kicking back Kuuga in the chest. Once the Kamen Rider staggered back, Ojiro tried to sweep his feet. Kuuga quickly flipped back and Ojiro used the opportunity to launch himself and Kuuga and drop kicking him in the chest, sending him to the ground.

Kuuga noticed a metal pole that was rolling on the floor, which came from the top of the crates he crashed into earlier. A card appeared in Kuuga's hand and he inserted it into the Decadriver and activated it.

[FormRide: Dragon]

Kuuga's armor morphed and changed color, changing from red to blue. The only piece of armor that changed color was the chestpiece, that now was a pattern molded around its sleeve. His shoulderpads are also black. Kuuga picked up a metal pole and turned into the Dragon Rod, a staff that extends on both sides.

"Woah! He transformed again!" Kirishima exclaimed.

"What? Does his forms have forms too?" Kaminari questioned.

"Interesting, he can completely transform an object into a weapon. I would've imagined he could have summoned it," Yaoyorozu said.

Bakugo watched intently. He believed that he could defeat the Kamen Rider's forms since they seemed to lack the firepower he had. However, he wasn't dumb to underestimate his newly marked rival. Bakugo had a hinch that Kazuhiro had a lot of potential beneath that mask of his, and he didn't want to see that potential rise.

Ojiro was surprised to see that Kuuga transformed into another form and that one used a weapon. Kuuga spun his staff around and got in a stance, inviting Ojiro to attack him. Seeing how the tailed martial artist was hesitant to attack, Kuuga charged in. The Kamen Rider swung his staff but blocked it with his tail. Kuuga was quick to swing the other end of the Dragon Rodand smacked him on his waist

The tailed martial artist threw a kick aimed at his head but Kuuga ducked beneath him. HE swung the Dragon Rod at his feet and tripped Ojiro. He then raised the Dragon Rod in the air and slammed it down. Ojiro was quick enough to dodge the attack.

The tailed martial artist panted as he got. He thought, "He's fast. Too fast in fact."

Kuuga spared him no time and continued being on the offensive. He knew that Ojiro was running out of breath so unleashing a near-endless stream of attacks would tire him out. The Kamen Rider's attack was quick and Ojiro tried his best to dodge the attack while blocking any attack with his tail. The Dragon Rod offered range to attack Ojiro from multiple directions. Eventually, Ojiro was nearly out of breath and Kuuga knew this. He struck Ojiro twice, pushing him back. Kuuga jumped into the air thrusted the Dragon Rod in his chest, launching him back into another pile of crates.

As Ojiro groaned, Kuuga grabbed some capture tape from his belt and wrapped it around Ojiro's wrist. The Kamen Rider asked, "Are you alright?"

"I'll be fine," Ojiro said. "To be honest, this is less humiliating than round 2. It's been fun fighting against someone closer to my skill level."

"I'm glad to be of service," Kuuga said. He pulled out a small communication device from his belt. "I've got Ojiro. Let's rendezvous."

Shoji tapped into his communication device. He was currently in a storage room of the building.

"Alright, I'm still looking for the bomb. It's not on the fourth floor and I'm currently checking the third. Let's rendezvous by the stairs on the-" Shoji looked up to see a shelf with crates falling on him. Before he could react, he was crushed by it.

"Shoji?!" Kuuga cried out in his communication device.

Hagakure flexed her very transparent muscles with pride, proud that she was able to catch Shoji off-guard. She was walking lighter than before to make sure that Shoji wouldn't be able to detect her so easily. It paid off as she managed to incapacitate the tentacle-armed boy.

"Shoji?!" Kuuga cried out. The last thing he heard was the sound of crates falling and crashing. Kuuga put away his communication device. "Dammit, man. Looks like your partner one-upped mine."

Ojiro was surprised by this. He said, "I'm surprised that she managed to take down someone as large as him."

"She probably was just too sneaky for him to detect her this round," Kuuga said. Kuuga picked up a metal pole and transformed it into a Dragon Rod. "Sit tight."

"I would say good luck but, y'know," Ojiro said.

"I get it," Kuuga nodded before leaving.`

Kuuga checked the third floor for the bomb. He found the room it was hiding but on the other side of it, which was one long and wide hall with shelves. Kuuga paced himself through the room, ready to attack. Suddenly he was pushed from behind. He turned and used the momentum to swing the dragon rod. He didn't hit anyone. One of the shelves tipped forward and Kuuga swiftly rolled out of the way. He pulled out a card and inserted it into the belt.

[FormRide: Pegasus]

Kuuga changed forms, this time he went from blue to green. The only difference is that the mold on the chest and the shoulderpads are mismatched. The left one is pointed while the right is rounded. Kuuga's Dragon was replaced with the Pegasus Bowgun, a gun with a bow-shaped barrel.

"Another form, this time it's green. Does he have like a whole rainbow of suits?" Kaminari asked jokingly.

"I wonder what this one is capable of," Tokoyami said.

They watched as he carefully walked through the long stretch of the aisle. He stopped, which confused the students.

"What's he doing standing around? He's going to be vulnerable to that girl's attack!" Kirishima shouted

"It looks like he's listening," Todoroki pointed out.

Kuuga was indeed listening. In his Pegasus form, Kuuga has very heightened senses. He hears Hagakure's footsteps from the aisle next to him. The Kamen Rider quickly jumped and climbed up onto a shelf and fired several Pegasus Arrows in front of Hagakure, stopping her in her tracks. She yelped as she stepped back.

"How did you see me?!" Hagakure asked.

The suddenness of being shot at left Hagakure to make the mistake of confirming her position. Kuuga dropped the Pegasus Bowgun jumped down and landed right next to her. Hagakure reacted by trying to punch Kuuga, but his enhanced senses allowed him to grab her wrist and pull her forward to another shelve. He then used the capture tape to trap her arm on the pole of the shelf. When the transparent girl tried to untie herself, Kuuga grabbed her arm and used even more capture tape

"The Hero team wins the match!" All Might shouted. Kuuga winced as he quickly deactivated his belt, transforming back into his Hero costume. He caught the Kuuga card, which now started its cooldown.

"Seriously, how did you spot me?" Hagakure asked.

"Enhanced senses. They're significantly improved to the point even the faintest sounds are loud in my ear," Kazuhiro said.

"Then did the announcement tear your ear?"

"It did," Kazuhiro admitted.

Kazuhiro, Shoji, Ojiro, and Hagakure stood in front of the class and were ready to hear their assessment from All Might.

"For the final match, I would like to give the MVP to Young Kimura!" All Might proclaimed. "Can anyone tell me why?"

"He took down the two villains by himself!" Kaminari said.

"There's a little bit more to it than that," All Might said. Yaoyorozu raised her hand once more. "Young Yaoyorozu, please take it away once again!"

"The one thing that Kimura had over the others is his adaptability in multiple situations. When he fought against Ojiro, he changed forms to become more evenly matched with him and when things started to look like a stalemate, he changed forms. Similarly, he did the same when fighting against Hagakure. However he was reckless in pursuing Ojiro so blindly," Yaoyorozu explained.

"Fair point," Kimura said, feeling a bit defeated that it wasn't a perfect explanation.

"As for the performance of his teammate, Shoji did his best to relay information to Kimura and scout the area but he let his guard down, which Hagakure took advantage of," Yaoyorozu explained even further. "As for Ojiro and Hagakure, they did their best to combat their enemies. Hagakure managed to take down one of the heroes. However, she did not use any capture tape to properly apprehend him. If Shoji ever recovered, he would still be an active threat to her team. As for Ojiro, he could've stuck closer to the bomb to defend it but straying them away from the floor was a valid strategy."

"Th-thanks, Young Yaoyorozu. Your analysis is on-point as always," All Might said.

Kazuhiro finally got a taste of what it's like to be in the Hero course and he's glad to at least live up to the expectations so far. The real deal comes in when he probably graduates. At this pace and with the support of the other Kamen Rider cards, he'll be ready for whatever villain this world throws at him or when Hundred arrives.

It was after school. Kazuhiro intended to go home right away but Kaminari stopped him before he could leave.

"Hey, that was some cool shit you pulled off at hero training!" Kaminari proclaimed. Bakugo overheard the praise that Kazuhiro was getting and scoffed at it before leaving.

"Thanks, uh," Kazuhiro paused.

"Oh, my name is Kaminari," Kaminari said. "Still you gotta spill the beans on how your power works." Some of the students leaned in to listen while one of them scoffed.

"I think you're annoying him," Jirou said. She was a girl with black hair with earphone jacks on her earlobes.

"Come on, aren't you a little curious about how he's able to do what he can?" Kaminari said.

"Hate to break it to you, but I don't know how my Quirk works. I know how it works but there's no way to explain its origin."

"Hm, what do you mean?"

Kazuhiro materialized Decade's card and pointed the portrait at him. He said, "I don't know how or why Decade is my main form. I don't know how it was created and why I need a card to put it in a belt and transform."

"Kind of an odd name to call yourself Decade unless there's some hidden meaning behind it," Tsuyu said.

"It's just the name of my "base" form."

"Oh, the pink one?" Jirou asked.

"It's magenta, but yeah it is the one you were referring to."

"I see, so does that apply to your other form?" Kirishima asked. Kazuhiro nodded as he formed Kuuga's card.

"Can I take a look?" Kaminari asked. Kazuhiro handed Kaminari the Kuuga card. Jirou, who was still around also took a look at the card.

"So for you to transform, you need to insert a card in that belt that pops up around your waist?" Jirou asked. Kazuhiro nodded.

"Like, what makes this different from the other ones?" Kaminari asked.

"How do I put it?" Kazuhiro paused. "Kuuga base form is a better close-range brawler, best suited for hand-to-hand combat, which was why I picked it while I went against Ojiro. Dragon, which is the blue form, is weaker but is faster and uses a weapon. As for Pegasus, my green form, I have a ranged weapon and my senses a significantly enhanced, which allowed me to find Hagakure. The only downside is that they're also sensitive so I can't stay in that form for too long."

"Man, you hit the jackpot when it came to Quirks. That kinda adaptability would make you desirable to Hero agencies," Sero said.

"We'll see," Kazuhiro said.

Kazuhiro spent the next few minutes talking with his classmates. The opened and Izuku walked in. The class turned their attention to Izuku

"Oh, Midoriya's here!" Kirishima shouted. Everyone approached Izuku. "Good work! Man, I don't know what you were saying during the match but you were fired up!"

"I can't believe you fought evenly with Bakugou, who was first in the entrance exam!" Sero commented.

"You did a good job dodging!" Ashido said.

"You guys did that in the first match, so the rest of us had to give it our all, too," Sato added.

"You were far from elegant, but-" Aoyama was suddenly cut off by Ashido jumping in front of him.

"You did a good job dodging!" Ashido added once more.

"H-Huh?" Izuku stuttered. Everyone began introducing themselves to him,

The group of students began to introduce themselves to Izuku. Kazuhiro remained quiet in the side as he already introduced himself to him. Uraraka walked in with Iida from another door. They carrying some books.

"Wait, Deku, she didn't heal your injuries?" Uraraka asked as he

"Oh, uh, it's because of how much stamina I have, and…" Izuku looked at the empty seat where Bakugo was supposed to be. "Huh? Um, Uraraka more importantly, do you know where Kacchan is?"

"You mean Bakugo?" Uraraka asked. "He went home just now without saying anything."

"I see, thank you so much," Izuku said before leaving.

"Wait, Deku!" Uraraka tried to stop him as well.

"This will be interesting," Kazuhiro thought.

Kazuhiro and a few other classmates watched as Izuku and Bakugo talked out what just happened. They could see the tears in his eyes before he turned and walked away. All Might arrived to try to comfort Bakugo but it looked like it didn't do much.

"Those two have a lot to work out this semester," Sero said.

"Definitely," Kazuhiro said. "You saw during that match how Bakugo treated Midoriya. I wonder what it will be like for the rest of the school year."

Author's Note

A challenge I oppose myself with is to name titles that reference Kamen Rider. Kind of like how Revice did it with the Vistamps jingles. Of course, the chapter names will be based on the significant Rider that Decade uses.

As for future fights, don't expect the class to be in awe or comment every time Kazuhiro transforms. At some point, it becomes too much of a regular occurrence. As how he scales with the rest of the class, without saying too much, I want to make him a top-tier fighter. Having the powers of 23 different heroes that branch off into different sets while also being guided/influenced by them gives him an edge when going against most. However, I don't want to write him as OP. Kazuhiro, while being Decade, isn't Tsukasa. When more experienced fighters or enemies come in then we'll see the gap between Decade and the others. Despite being influenced and guided by the powers, he is still susceptible to his limitations and there's always room for human error.

I also decided to respond to some reviews as kinda like a way to give you guys some "behind the scenes" thinking and answer questions that some of you may have.

Response corner:

TheOkWriter (from chapter 4): The thing about using transform over henshin is that I want the dialogue to be consistent. The characters speak Japanese but the written dialogue is supposed to be in English. I get it, henshin is the iconic phrase but it's just the word transform. Unless it's a name, it will be written in English.

Guest (from chapters 1 and 4): I had to use Google Translate so apologies if I happen to misread you or not understand your review. I'm not interested in writing other Kamen Rider x My Hero Academia stories. I do want to write more stories about the two franchises but as of now, I'm focused on this series and I'm not taking any requests or suggestions.