It has received multiple anime adaptations since , each handled by a different studio, with a fourth anime season currently in production. The series begins with a strange phenomenon called a "spatial quake" devastating the center of Eurasia , resulting in at least million casualties. For the next 30 years, smaller spatial quakes plague the world on an irregular basis. In the present, Shido Itsuka , a seemingly ordinary high school student comes across a mysterious girl at the ground zero of a spatial quake. He learns from his adoptive sister Kotori that the girl is one of the "Spirits" from different dimensions who are the real cause of the spatial quakes that occur when they manifest themselves in the real world. He also learns that Kotori is the commander of the airship Fraxinus , crewed by the organization Ratatoskr and its parent company Asgard Electronics, and is recruited to make use of his mysterious ability to seal the Spirits' powers thus stopping them from being a threat to mankind.
Shido takes Origami on a date but she's not acting like herself. After all hell breaks loose, the fate of the world depends on whether he can reach out to her heart or not. While the witch impersonates one of his friends, Shido is forced into a game where he must identify Natsumi before it's too late and they all disappear.