[1] The album contained Yonezu's previously released singles "Flowerwall" and "Unbelievers" as well as "Mirage Song", which he had performed on Twitcasting.

Will-O-Wisp illustrates turning one's back on a prosperous life and going into the darkness; the musicians of Bremen grow jaded of their current life and decide to head to Bremen, but never reach the city.

Yonezu wished to express the journey's importance over the destination.

The first production of all versions included a serial number for an advance ticket lottery for his live tour Ongakudan, to be held from January 2016.

All tracks are written by Kenshi Yonezu, with collaborators noted.^ Shipments figures based on certification alone.