Also known as: シュガーソングとビターステップ, 血界戦線EDパロ
Ending theme for the first season of Kekkai Sensen, performed by UNISON SQUARE GARDEN.
A cover by Hello Happy World! is part of the game BanG Dream! Girls Band Party.
Images with this tag are a reference to the ending animation, which usually includes dancing, a tango dip, and a red curtain background.