It's Time for Oogiri Tournament, Meow!

THE IDOLM@STER SideM Wakeatte Mini! · Episode 2 · “It's Time for Oogiri Tournament, Meow!”

From "THE iDOLM@STER: SideM" franchise which spawned a game, live shows, and comics, comes a short anime featuring the idols from 315 Production in mini form. The total number of idols on the show... is all 46 of them! (Source: Crunchyroll)