A magnetic distortion occurred near the moon 20 years ago. Since then, creatures from space have been attacking Earth. The only ones who could stand up against them were magical girls whose magical power had awakened under the influence of that magnetic field.
Having awakened to her magical powers, Aoi was scouted by Saeki of the Ministry of Defense's Space Defense Policy Bureau. Even now at 22, she retains her powers and continues to work as a magical girl. Although Aoi has always had feelings for Saeki, she feels conflicted with how he's always treated her.
One day a space creature appears that Aoi's never seen before... and it's a lewd beast?!
Having let down her guard, Aoi suddenly finds herself entangled in tentacles!