The J-pop duo YOASOBI was formed in 2019 by vocalist Ikura and producer Ayase.
Ikura — the stage name of singer/songwriter Lilas Ikuta — had already built a
moderate audience with solo EPs like 2017's Rerise and 2019's Jukebox, while
Ayase had likewise launched a solo career with releases like 2019's Ghost City
Tokyo. Together, they began crafting songs featuring Vocaloid software, pop
melodies, and lyrics based upon short stories, debuting this approach with "Yoru
ni Kakeru." Released in December 2019 and based upon Mayo Hoshino's Thanatos no
Yūwaku, the song became a chart-topp...