Second season of B-Project: Kodou*Ambitious.

An extra episode of Rio: Rainbow Gate! which will be bundled with the seventh volume of the Blu-ray and the DVD.

Due to the recent events that happened on the last episodes of the season, the Goddess have some stability problems with their body systems. The always adult looking Urd becomes a little girl and has a fateful encounter with a boy, whereas little Skuld becomes an adult and wants to experiment adulthood together with Keiichi.

Following the closure of Uranohoshi Girls' High School, the third-year students—Dia Kurosawa, Kanan Matsuura, and Mari Ohara—have just graduated, leaving Aqours with solely the first and second-years. While searching for a new place the remaining members can use to practice, they decide to visit the new school they will soon enroll in. However, to their surprise, the building seems to be abandoned! It turns out that due to the school board's worries regarding how the freshly transferred Uranohoshi students may burden the clubs, they were instead sent to a branch school. This sets Aqours on a new goal—to prove that Uranohoshi students are serious in their clubs as well. Meanwhile, another problem arises: the third-years have unexpectedly gone missing during their graduation trip! Love Live! Sunshine!! The School Idol Movie: Over the Rainbow revolves around the remaining Aqours members as they venture out to search for their missing seniors and, at the same time, try to figure out a way to change the new school's mind.