AIKATSU! 10TH STORY: MIRAI E NO STARWAY

The main leads Ichigo Hoshimiya and Akari Oozora in their debut outfits as the Cosmos duo (from the television series finale). The film's story introduction reveals that the first live Cosmos concert was a great success. Later, Ichigo faces her graduation from Starlight Academy in half a year — but even after graduation, the life of an idol continues. — Description from AniList community (anilist.co).