Let’s dance.

A blonde anime girl in a black dress poses in a brightly lit room, followed by a dark-haired girl in a black dress dancing under a full moon, then a girl with brown hair dancing in a purple-lit environment, then three girls in school uniforms dancing in a classroom, then the word "DACIN" appears over a dancing figure, and finally a girl with long brown hair is seen falling or being pushed down a staircase.