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 , Chidorigafuchi Aine. Aine suddenly took off her clothes in front of his eyes but ? Don't look you pervert-? ?No, that's you right!?? Kizuna couldn't help but got confused by the deplorably wicked tongued Aine. But, right there a contact from his sister about an important mission came. The content of the contact was――to rub Aine's breast!? The truth was that Kizuna possessed the power to power up girl by doing perverted act, with that power a future of battle with alternate world began.