It was released as a single on November 18, 2022, through Sony Music Entertainment Japan, as the third song from the short story collection project Hajimete no after "Mr.", and "Suki da".

On December 1, 2021, the same date as their EP The Book 2 release, Yoasobi announced the project Hajimete no, a collaboration between the duo and four Naoki Prize-winning novelists: Rio Shimamoto, Mizuki Tsujimura, Miyuki Miyabe, and Eto Mori, to produce songs based on the authors' novel under the theme of "a story to read when you do [something] for the first time".

[5] To commemorate the release, billboards of 400-character handwritten reading impressions of Yūrei were placed inside the Tokyo Metro subways and at Shibuya Station between November 7 and 13.

Japanese voice actor Shin'ichirō Kamio, actress Tao Tsuchiya, YouTuber Bunkei, singer Momoko Gumi Company (Bish), comedian Nishida (Lalande), and sociologist Noritoshi Furuichi are in charge of writing the impressions.

[11] "Umi no Manimani" is a medium-tempo track written by member Ayase, expressing "the mood change of the protagonist who runs away from home to the mysterious world of the beach at night, which is the main worldview of the story.