Fate/Kaleid Liner Prisma Illya 2wei! Season 2 Episode 1 E 1

After all their fierce battles, Illya and Miyu have finished collecting all the Class Cards and returned to an ordinary, peaceful school life. Then one day, they both join Rin and Luvia in a great cave in order to pour mana into the disrupted ley lines and stabilize them. It was supposed to be a simple mission for those magical girls, but...