Hida Kizuna possesses the HHG (Heart Hybrid Gear) ability, but it is not strong enough to make him particularly important. His older sister calls him to transfer to a strategic defense school, where many of...

Hida Kizuna visited the strategic defense academy Ataraxia based from the call of her big sister where he encountered the girl who operated the magic armor <Zeros>, Chidorigafuchi Aine. Aine suddenly took of...