Fate/kaleid liner Prisma Illya - S04

Illya and the gang have wrapped up their fight with the heroic spirit inside the eighth class card. They are back in vacation mode, trying to make the most of the summer break they have left. But their hopes are crushed in an instant. An all-too-unrealistic silhouette shows up when they go to check out the strange event at Mount Enzō. After a brief skirmish, the whole space gets warped. Illya wakes up in a wintry Fuyuki City... in a parallel world. This is the world where Miyu was born and raised.