Extraterrestrial beings have invaded our garden world, hell bent on wiping humanity off the face of the planet.
The only hope is a specialised force of genetically-engineered female "Pandoras" and their male partners known as "Limiters," who represent the last line of defense against a horrific alien force.
Kazuya Aoi is a Limiter who enrolls in a prestigious academy that trains genetically-engineered soldiers.
Having made a promise to his Pandora sisterwho died in battle, Kazuya must overcome his sadness and become the best he can be.
His first major obstacle is a frigid second-year student known as Satellizerel Bridget, who has remained undefeated in combat simulation.
Does Kazuya have what it takes to beat her while readying himself for an impending war?