Lambda 8 is going bankrupt, so to fix that, they assembled Momoko, Amane, Yurika, Tsubasa and Rinka to become the "Sister x Sisters"! Before the performance, things go wrong as people assumed that the Sister x Sisters were little sister characters, not Nuns, so Momoko and the team create a way to work it like usual. It pulls off, the show goes well and Lambda 8 stays in business.
