Fate/kaleid liner Prisma☆Illya 3rei!!

Illya and her friends have finished their battle against the heroic spirit from the Eighth Class Card and are enjoying the rest of their summer vacation. However, their plans are interrupted when they encounter an unusual phenomenon at Mount Enzō. After a brief confrontation, the surrounding space becomes distorted, and Illya awakens in a version of Fuyuki City covered in snow. This is the world where Miyu was born and lived.