is a Japanese manga series written and illustrated by Tomoko Yamashita. It was serialized in the monthly manga magazine Magazine Be × Boy from March 7, 2013, to December 7, 2020. A live-action film adaptation was released on January 22, 2021, and an anime television series adaptation by Zero-G aired from October to December 2021. Plot Kosuke Mikado, a bookstore clerk, is able to see ghosts since he was young, which terrifies him. One day, he meets Rihito Hiyakawa, a fearless exorcist who lacks social boundaries. Hiyakawa is able to see and exorcise ghosts by entering Mikado's body and requests him to become his assistant. As the two work closely together, they learn that the supernatural incidents are closely tied with a high school student named Erika Hiura, who works as a mercenary necromancer to cast curses on other people. As Mikado and Hiyakawa investigate, Mikado begins realizing that Hiyakawa is hiding a secret. Characters Played by: Jun Shison Played by: Masaki Okada Played by: Yurina Hirate Portrayed by: Kenichi Takita Portrayed by: Shinya Niiro Development In 2021, Yamashita stated that she initially wrote The Night Beyond the Tricornered Window as a short story before it became serialized. Yamashita also affirmed that while she did see feedback from others that Hiyakawa and Mikado could be considered a reversible pairing, she intended for Hiyakawa to be the top in their relationship. In addition, she stated that she focuses on the surrounding environment and characters besides the main couple. Yamashita also said that she wanted to include heterosexual romance in her 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 magazine. She claimed that she initially wrote Erika and Mukae as characters who would lure Hiyakawa and Mikado into temptation, but she changed her mind after realizing how "sad" it would be if her characters had an "unhappy" role. Yamashita also stated that she includes diversity into her works, such as including female police officers with male police officers. Media Manga The Night Beyond the Tricornered Window is written and illustrated by Tomoko Yamashita. It is her longest work to date. It was serialized in the monthly manga magazine Magazine Be × Boy from March 7, 2013, in the April 2013 issue to December 7, 2020, in the January 2021