Rika Kinugawa

Hida Kizuna possesses the HHG (Heart Hybrid Gear) ability, but it is not strong enough to make him particularly important. His older sister calls ...

One day, Naho Takamiya receives a letter written to herself from ten years in the future. As Naho reads on, the letter recites the exact events ...

“Hundred”—that is the only weapon that can oppose the mysterious life form “Savage” from visiting the earth. The protagonist, Kisaragi Hayato, ...