Shido Itsuka was born in a world where spacequakes, distortions of varying size that devastate everything in the vicinity, can happen anytime and anywhere. When his city’s alarm detects one impending, the high schooler races to where he promised to meet his sister Kotori in an attempt to rescue her. But upon his arrival, the spacequake transpires in that very spot, and standing in the middle of the destruction is a beautiful sword-wielding girl. After their brief encounter, he discovers from an unscathed Kotori that the mysterious girl is one of many Spirits who are the reason for the distortions, and seducing them will prevent spacequakes. Shido now has one week to learn how to woo a Spirit - will he be prepared when it’s time to do it for real?