Kamishiraishi made her CD debut in June 2015 with the theme song "Su-ma-i-ru" ("Smile") for the NHK Educational TV animated series Hanakappa [ja].[12] Two years later, she sang the theme song "Narratage" for the film of the same title [ja], written and composed by Yojiro Noda of Radwimps, under the stage name "Adieu".