On September 6, Kamishiraishi revealed herself as Adieu and announced that she would start full-fledged music activities under that name.[1] She performed the ending theme "Ao" for the TV anime Granblue Fantasy The Animation Season 2, which started airing on October 4.[39] Adieu is the first ever performer featured on the YouTube channel The First Take, singing "Narratage" in a video published on November 15;[40] as of June 2021, she has appeared four times on the channel.