A bunny alien, a maid-dominatrix, a cyborg, a magical girl, and a transforming super hero set out to vanquish a set of monsters to retrieve a set of magical Mahjong tiles known as the Pai - these ancient artifacts will grant the one who gathers them a wish, and these girls aren't going to let anything stand in their way - monsters, or each other!

To the unsuspecting eye Maki, Reimi and Yuka may not look like ace crime fighters, which might explain why they're stuck on traffic patrol instead of more "exciting" police duties. All that changes when Yuka gets herself kidnapped by a white slave organization run by a politically connected businessman who's got the rest of the police cowed. Now it's up to Maki and Reimi to don skin-tight battle armor, liberate a tank, and make sure that a certain slaver learns that when you play with fire, you're going to get your ass burned!

After the death of her mother Katsumi wants nothing more to do with this horrible place known as Tokyo. Forced into staying an infuriated Katsumi returns to AMP HQ where chief Rally Cheyenne pleads with her to stay and join the team. However, her pleading falls on deaf ears as Katsumi exclaims that she wants nothing more to do with them, leaving to find another way home. Meanwhile the Demons taking over Tokyo begin their final move against humanity and the AMP. They realize that the key to opening their demon world lies within Katsumi. Her unwanted abilities mean everything to them and without her their plan would fail. The stage is set once again on the destroyed Tokyo Bay Bridge. Will Katsumi choose her destiny and defend her new found friend or will she fall to the weakness and despair within her?

“攻击者（Panzer）”是指身穿具有将各种素质具体化能力的盔甲“重甲”，以被称为“Tool”的武器来进行战斗的特殊能力者。本来攻击者只能由具备良好身体素质和进行过严格训练的人才能当上，但由于后来很多人把攻击者比试当成一种竞技，所以人们购买简单的配备就能称为初级攻击者。随着人口增加，包括初级者在内，帝都等大都会区每十个人就有一个是攻击者。 身为攻击者的螺旋皇国第三公主·琉璃堂杜莉丝正式入读帝都学园，但由于之前深居宫廷，所以她不懂世故，在入学后不断碰壁，与其他攻击者的较量也以失败收场。但经过一番挫折后，杜莉丝渐渐学会了如何与人相处，并在姐姐杜莉亚的训练下，开始成为一名出色的攻击者……