A Japanese light novel series written by Liz Takayama and illustrated by keepout. It began serialization online in July 2015 on the user-generated novel publishing website Shōsetsuka ni Narō. A manga adaptation with art by Sei Takano has been serialized online via Kadokawa Shoten's ComicWalker website since November 2016. An anime television series adaptation by Diomedéa aired from July to September 2022.
