Biography
Yusei is a lofi-beat producer, formerly Yusei is the name of ミサルカ's ex-guitarist, who left the band in December 2009. Lately they have become known for uploading their songs on YouTube as free to use beats for use by other artists.
Yusei has released of their beats publically as songs, mainly instrumentals with repeating vocals which can be found on Youtube, Spotify, Deezer and other streaming platforms.
Biography text from Last.fm, available under CC BY-SA.