[Machine Translation] a flood of circle's single featuring the ending theme for the TV anime "Gunsei no Magumeru", which will be broadcast from April 2019! Inspired by the original story by Ryosuke Sasaki, the song is a rock 'n' roll number that could become the band's anthem in the future, matching a flood of circle's world view with that of "Gunsei no Magumeru". The album also includes "Backstreet Runners II", a sequel to "Backstreet Runners" from the album "Center of the Earth", a cover of Tokyo Incidents' "Gunsei Biyori", and "The Key - Gunsei no Magumeru ver. The Key - Gunsei no Magumeru ver. Newly designed jacket.