is a Japanese novel written by Kanako Nishi and published by Gentosha in April 2014. A manga adaptation with art by Sugisaku was serialized online via Gentosha's Comic Boost website from January 29, 2021, to March 11, 2022. It has been collected in two tankà Âbon volumes. An anime film adaptation by Studio 4ðC premiered in Japan on June 11, 2021.
Atsushi Yamanishi and Yuichi Yasoda had been cast in unspecified roles.
The novel has more than 350,000 copies in print.
An anime film adaptation by Studio 4ðC was announced on January 1, 2021, with Ayumu Watanabe as director, Satomi Ooshima as scriptwriter, Sanma Akashiya as producer, and Kenichi Konishi designing the characters. The film premiered on June 11, 2021. In October 2021, the film was screened In Competition as part of the Scotland Loves Animation film festival, where it won the "Golden Partridge" Jury Award.