When interdimensional gates opened on Earth, allowing beings from warring dimensions to extend their conflict, a fragile peace emerges between the Z/X and humanity. Azumi Kakamigahara faces a pivotal decision: forge a pact with the enchanting Z/X, Rigel, or succumb to the illness that has plagued her existence. Embracing the pact means embarking on a journey to a new Academy where young women and their Z/X partners train covertly to thwart impending threats. As Azumi transitions to this unfamiliar setting with her newfound comrades, their school becomes the target of an abrupt enemy assault, setting the stage for their first trial together.