Yoasobi is a Japanese pop duo formed in 2019. It consists of musician and record producer Ayase and singer-songwriter Lilas Ikuta, under the moniker Ikura. With the slogan "novel into music", the duo originally released songs based on selected fictional stories posted on Monogatary.com, a social media website for creative writing operated by Sony Music Entertainment Japan. Sources later also come from various media such as stories written by professional authors, books, letters, messages, plays, etc. Their music has been characterized as a blend of J-pop and Vocaloid music.