is a song by Japanese duo Yoasobi from their debut EP, The Book (2021). It was released as a single on July 20, 2020, through Sony Music Entertainment Japan. The song was based on the short story of the same name by Shinano, won the Yoasobi Contest Vol. 1. A middle tempo song, it depicts a couple breaking up in the morning. The song also featured on the film, Tabun, based on the same story.
The English version of the song, titled "Haven't", was included on the duo's first English-language EP E-Side, released on November 12, 2021. The song went viral on TikTok in 2022 through its using in artificial intelligence manga filter.