Bootleg is the fourth album by Kenshi Yonezu, released on November 1, 2017.

August 30, 2017 is the ten year anniversary of Hatsune Miku, while Magical Mirai is the large Vocaloid concert held by Crypton Future Media.

[2][3] Besides, Crypton Future Media also invited some notable Vocaloid producers, such as Wowaka and N-buna, to write song and collected as birthday celebrating album "Re:Start" which peaked No.6 on Oricon.

[4] Yonezu considered titling the album Dune as he was confident that he could make beautiful music, and want to prove it to people.

[5] "Dune" is the theme song of Magical Mirai 2017, with the album version having Yonezu as the lead vocalist with Hatsune Miku in the background rather than the other way around in the single release.