The sky shined brightly as the sun gleamed, shining as brightly as ever. People were walking around, exploring the open shops. But two of those people were our main characters.

"Baka! Baka! Baka!" A girl that stood at 4'11 shouted at an older male. The male seemed unfazed. The girl was glaring at him, and it was usually a bad thing. See, the thing is, these two are siblings.

The female of the two, like said before, stood at 4'11 and had long blond hair that stopped mid back with fair white skin, a pair of shining blue eyes. The girl wore a white shirt with a pattern of roses on the top left of the shirt and a medium blue skirt that stopped at just at her knees with a pair of white slippers. This was Rose Iglesias

Standing next to her, and the one she was yelling at, was an older male that stood at 5'7 and had shockingly black hair. His eyes were a completely other story. They were the same blue color as his sister but bits of red spiked out from the pupil. The reason was this was his central heterochromia.

He wore a light brown trench coat over a dark grey hoodie, a white shirt, jeans, and a pair of mismatched colored sneakers, the left one is blue and the other one being red. This was Hiro Iglesias.

"What did I do?" Hiro asks Rose, looking down at her. "You made us pass up the Technology Museum!", Rose says and puffs her cheeks, "Stupid Baka!" Hiro sweat drops. Sure he likes technology to, but, he could resist the ice cream cart.

Rose glares at her older brother being she began to pound against his chest. "Baka! Baka! Baka! Baka!", she keeps saying. 'Now I have to deal with a mad little sister. Great', he thought.

After a second, the two siblings backtracked, stopping in front of a large museum of sorts. Rose was jittery with excitement. Before Hiro could stop her, Rose ran into the technology museum. Hiro sighs and ran after her.

"Rose!", Hiro shouts, grabbing his sister's wrist. Rose didn't respond, she was too in depth at what she was looking at. " What are you l-", he stopped mid-sentence, gasping, "Pandora's Box!" Hiro quickly got up close.

Said box had a dusty grey color. Prior to its name, it was a box, being made out of 6 panels. On the podium it was on, it read 'This box was brought back together by Kamen Rider Build, bringing Japan back to normal by removing the Skywall. After the incidents, it was said that it held no energy.'

Rose was just as amazed as her older brother. Just a few feet away, 2 security guards were carrying a man back to the entrance. The man was struggling. He was just recently at one of the exhibits, the exhibit being the Transteam gun.

The man struggled out of the guards' grips and rushed over to the Pandora's Box, pushing Rose and Hiro out of the way. Within that instant, Hiro reached out to stop the man's arm which was reached for the top of the box. Unfortunately, Hiro didn't stop the man but ended up placing his hand on the box as the man does. The box began to glow, the panels changing color.

The panels on the right and left sides changed to a bright blue, the panels on the front and back changed to crimson red, and the panels on the top and bottom turned to a relic green. Before the man and Hiro could remove their hands, the box burst, blasting the two back.

Rose rushed to her brother," Hiro!" Hito was out cold. Rose began to shake her older brother, scared. "Hiro! Hiro!", she kept saying.

But, that was a few days ago. Everything was taken care of. The man that was there was taken into custody and Hiro was taken home, Rose looking after him.

Currently, the passed out Hiro was in his room. His room was mainly black, but large stripes of red and blue decorated the walls. The male began to stir, slowly opening his eyes. He yawned as he sat up. "Huh? Where am I?", he asked himself. He then realized.

'Rose must have brought me home.', Hiro through. He got up and stretched, noticing that he didn't have his trench coat or hoodie on so he was left in his jeans and a white shirt. He stretched and smiled. "Man, I feel refreshed for some reason.", he says. He walked to the bathroom and looked into the mirror. What he saw, shocked him.

The tips of his hair were different, some of the tips were red, some were blue, and the rest were white. "Ahhhhhhh!", he shouts. Downstairs, Rose was taking care of fixing breakfast. She sighs as she heard his shout. "He must be up.", Rose said to herself and sat down the plate of pancakes on the counter.

Hiro rushed downstairs, holding his head. "Rose!", he says, looking at his little sister. Rose looked at him, giving the 'what?' face. "What happened!?", he asks her.

Rose sighs and explains everything to him. The male took it all in, but before Rose could give him her thoughts about what caused the change was, Hiro was already holding his chin, mumbling away. Rose sweatdrops at the action of her brother. 'He really needs to stop that habit.', she thought.

"But the real question here is what the man wanted from Pandora's Box.", Hiro said, looking at Rose. Rose nodded, it was a mystery. Hiro sighs before catching a whiff of the pancakes in the room. Hiro looks at the delicious food and began to reach out only to receive a harsh slap on the hand from Rose, making Hiro wince.

-Build Up-(scene change)

A male with combed back blond hair, that looked to be going everywhere a bit, and green eyes, which darted from left to right, was running. The male wore a grey beanie, that kept his blond hair in place, a white undershirt underneath a grey unbuttoned shirt, a cross necklace, a white and blue unbutton shirt that was tied around his waist, a pair of black pants, and a pair of gold, blue, and white vans. This was Satoshi Hamada.

"Gotta... Keep... Running...", Satoshi panted. He leaned against the wall of a building. Suddenly, the wall beside him was punched, crushing it. The being that punched it wasn't a normal human.

Standing before Satoshi was a beast made out of dark grey and brownstone, it's hands being the largest of its body. Embedded into the creature's forehead was a piece of a dark relic green cracked panel. Inserted into the piece was a brown bottle, it itself being cracked slightly.

Satoshi became heavily scared. Behind the beast, A Pandora, police began to gather, aiming their pistols at it. " Put your hands in the air Monster!", one of them shouted at the monster.

The Pandora declined by punching the ground, cracking the ground underneath of officers. The officers became off balance and fell, some of them firing before they fell. The bullets seemed to bounce right off.

Up above, a news helicopter was broadcasting the whole thing, live. Back with Rose and Hiro, the two were watching the news, surprised by what's going on. Suddenly, a bit of Hiro's hair went up right before he rushed out of the house.

"Hiro!", Rose shouted, trying to get her brother to stop. She sighs when it didn't work. "Great." Hiro continued to run to the scene. It took a while, but he made it nether the less. "Hey!",Hiro shouts, gaining the attention of the Pandora.

The beast looked at Hiro before pounding its chest. Hiro reaches into the back of his light brown trench coat and pulled out a device. Said device had two slots on the left side, on the right is a crank. (I know, I'm not the best at describing the driver)

Hiro the puts the device at his waist, a belt ejecting out of one side of it before wrapping around and attaching st the other side. Hiro then reaches into his pockets and pulled out small red and blue bottles. "Now, let's begin the experiment.", he says as he shakes the Full Bottles, large equations coming out of nowhere beside Hiro, confusing the Pandora.

Hiro then turns the caps of the bottles before inserting them into the driver on his waist, the red one first. "Rabbit!", the belt says as the red bottle was inserted. Then came the blue bottle, "Tank! Best match!"

He then began to turn the crank causing the bottles to shake as their essence to be pumped out through pneumatic tubes that were being created by the driver. The tubes then stretched out, forming molds for the Full Bottle essences, the molds only making half of the armor.

"Are you ready?", the belt asks as the essences harden. " Henshin!", Hiro says. The two halves quickly snapped onto Hiro, connecting together. The armor wasn't what you expect it to be tho.

The whole armor had black mainly overall, but red and blue were thrown into it. The left leg had a red shin guard as a spring connected it to a bit of red armor that was just below the knee. The shin guard was connected to the shoe on the left side, a rabbit footprint being on the bottom of the red shoe.

The right leg was similar to the left, being it was blue and there wasn't a spring. On the bottom of the shoe, there were tread markings, making it similar to the treads on a tank.

The chest armor of the suit was mainly red overall, but it did have 2 blue strips. The left arm of the suit was blue, armor plating covering the arm, only showing a bit of the black under armor on the wrist. The shoulder pad wasn't too large despite the blue representing a Tank.

The right arm was the same as the left, the only difference being the red coloring. The helmet was mainly red, having a few blue strips. The back of the helmet was black, meaning the front was just a faceplate. The eyes of the helmet represented the side they're meant for, the right having a clear red bunny head and the left having a clear blue tank.

"FullMetal Moonsault! RabbitTank!", the driver calls out as Hiro, now Kamen Rider Build holds the left side of the belt as he points to the right. He then slides his hand across the barrel of the Tank eye, saying, "The Rules of Victory Have Been Set!"