The song was based on Mayo Hoshino's short story, An Invitation from Thanatos (Japanese: タナトスの誘惑, Hepburn: Tanatosu no Yūwaku, lit.

[1] The song and story depicts a man who is fascinated by a personification of death, Thanatos, who sent him a message "goodbye" and he tries to stop his girlfriend from suicide by jumping from height.

[3] An accompanying music video for "Yoru ni Kakeru" was first published on Ayase's YouTube channel on November 16, 2019 and its view count surpassed 10 million in 5 months.

[4] Soon after its release, the song topped the popularity charts on Spotify and Line Music,[4][5][6] as well as went viral on social media such as TikTok during COVID-19 pandemic in Japan began.

[17] Yoasobi, as a duo with band members, gave the televised debut performance of "Yoru ni Kakeru" at 71st NHK Kōhaku Uta Gassen on December 31,[18] filmed at Bookshelf Theater, Kadokawa Culture Center.