One person, a high school student named Arato Endo, treats hIEs like humans and sees them as equals, and though he wished to buy one, his financial situation hinders him from doing so.

In the chaos that follows, a hacked electric car threatens to run them over, and Lacia makes a deal with Arato, to assume ownership of her in exchange for her saving his life.

[3] During their panel at Anime Expo 2019, J-Novel Club announced a partnership with Tokyo Otaku Mode to release the novel in North America.

[3] Ptolemy's Singularity (天動のシンギュラリティ), a spin-off manga series written by Gun Snark and illustrated by Mitsuru Ohsaki, was launched on Kadokawa's Famitsu Comic Clear website on April 11, 2014, with a preview chapter having been published on March 14.

The series is directed by Seiji Mizushima at Diomedéa and written by Tatsuya Takahashi and Gō Zappa, with character designs by Hiroko Yaguchi.