One day, he meets Rihito Hiyakawa, a fearless exorcist who lacks social boundaries.

In 2021, Yamashita stated that she initially wrote The Night Beyond the Tricornered Window as a short story before it became serialized.

[9] Yamashita also said that she wanted to include heterosexual romance in her boys' love works and she was surprised that she received positive feedback on chapters that focused on Erika and Sasaki's romance, as well as Mikado's parents, despite the story being serialized in a boys' love magazine.

[12] In September 2014, Viz Media announced at Yaoi-Con that they licensed the series for North American distribution in English under their SuBLime imprint, releasing it in digital format.

[31][32] A live-action film adaptation was announced in January 2020, starring Jun Shison as Kosuke Mikado, Masaki Okada as Rihito Hiyakawa, and Yurina Hirate as Erika Hiura.

[34][35] Yuki Sakurai, Kenichi Takita, Emi Wakui, Makita Sports, Michitaka Tsutsui, and Shinya Niiro were announced as additional cast members in March 2020.

An anime television series adaptation of The Night Beyond the Tricornered Window was announced in the January 2021 issue of Magazine Be × Boy, published on December 7, 2020.

[42] The Night Beyond the Tricornered Window has sold a cumulative total of 1 million physical copies in Japan by January 2020.

[51] Rebecca Silverman from Anime News Network cites the horror and mystery plot as the series' greatest strength and that the lesser focus on romance may make it easier for readers who are not interested in boys' love.

[52] For the live-action film, Mark Schilling from The Japan Times gave it 3 out of 5 stars, describing it "absurd" but praising Hirate's acting.