New World Saga: Kamen Rider Build

This Series story differs from the original series

Story
Sento in the New World, after meeting the New World Banjo is depressed because he has to face the fact that nobody in the Old World remembers him. All he got now is Build Driver, White Pandora Panel and all the Fullbottles including Ryuga's Dragon Fullbottle. He settled in an old abandoned building near a pier. To stay alive Sento makes money with a gadget and a toy he created by collecting trash on the scrapyard, it's not much and only barely make his stomach full.

Several Months later
Sento saw something strange to the White Pandora Panel. Sometime later, a slimy thing gets out from the panel and took Sento's appearance. Sento ask what is it, the creature said he's a creature from a Planet Blood Tribe came from. Sento immediately took his Build Driver and transforms to Build RabbitRabbit, the creature mimics his Build Driver with parts of his body and began to transform to RabbitRabbit. The two clashes, Sento overwhelmed the creature with his speed But the creature immediately turns the table. The creature punch's sent Sento flying outside. Sento proceeds change to TankTank, but to no avail. The creature said his name is Killbas, he then took interest to fight Sento again. Sento said what is his objective, Killbas explains he loves to fight strong people. It's always been that way since he was born, he fights to relieves his boredom. In the Old World, he destroyed his own Planet because no one is capable of relieving his boredom and remembers his younger brother tried to stop him but failed. His name is Evolto but he and the rest of the Blood Tribe escapes before the planet is destroyed. Before they can escape, Killbas injects a small part of his body to Evolto without Evolto knowing it and enters the Pandora Box while Evolto's in Mars. Then he said, he will give Sento one and half year before fighting him and he will come to Sento's location on the day they fight. If he doesn't come or lose the battle, he would destroy Earth then he leaves.

Sento's New form GENIUS HAZARD
Sento enters University with his saved money and finished it in four months. With this, Sento applied a job and entered technology development department in Touto's Technology Research Enter. Working overtime for six months, he gained enough money to repair Genius Bottle in his repaired (not renovated) abandoned old building. Sento thinks this isn't enough to beat Killbas, then adds a modification to Hazard Trigger and Genius Bottle. After completing it for three months, he experimented the new form which he gave it a name Genius Hazard for one month. In the middle of his experiment, he used Overflow mode. He realizes his reflexes is increased but collapses due to severe strain to his nerves because of increased reflex, working overtime and experimenting non-stop.

4 Months Later
Sento waits for Killbas while taking a walk on a park. Killbas shouts to Sento and asks him if he's prepared for the battle. Sento replies he is indeed prepared, because he is the last person capable defending the Earth from destruction after all. Sento mutters borrowing Banjo's Power, Sento transforms to RabbitDragon (Normal).