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Hundred - that is the only weapon that can oppose the mysterious life form Savaga visiting the earth. The protagonist, Kirasagi Hayato, aims to become a Martial Arts Master using this Hundred. He managed to get into the battleship university Little Garden. "I wanted to see you, Hayato!" "How do you know my name?" Around the roommate, Emil Crossford, who somehow knows him well, Hayato gets an uneasy feeling. What’s more, just after the entrance ceremony, he gets asked for a duel by the campus’ strongest martial arts master Queen Claire Harvey.
One day high school student Hiro decides to apply as a monitor for a new gadget called JUNK. Soon he recieves a strange looking device in the mail. Upon activation, Hiro is encased in a powered armor JUNK suit granting him incredible strength, speed and agility. However, Hiro's repeat abuse at the hands of the school bullies leaves him hungry for revenge... not super heroism.
Shuto Katsuragi is a superhero otaku. Only problem is, he's too short and always getting teased for his height... especially when he tries to emulate his favorite superhero! To make matters worse, Shuto suddenly gets abducted and tricked into participating in some rather sketchy and super-villainous experiments! What's a shrimp to do when his dreams come true in ways he never expected?
The development of the Infinite Stratos powered exoskeleton changed the world’s balance of power. While the distribution of IS systems has created peace, only women have been able to pilot them. So when Ichika Orimura is discovered to be the first male with the ability to control an IS, whatever plans he had for his future are tossed out the window even as he’s thrown to the wolves and enrolled at the otherwise entirely female Infinite Stratos Academy by order of the Japanese government!
Continuation of Kamen Rider Spirits after the series changed magazines, Shin Kamen Rider Spirits follows the war between the evil Badan Empire and the 10 Showa Kamen Riders and their allies.