Fate/kaleid liner PRISMA☆ILLYA

Synopsis

The series takes place in Fuyuki City in an alternate timeline of Fate/stay night. In this world, Illya was born as the Holy Grail and planned to be used directly within the Fourth Grail War, being given knowledge needed at birth as a result. Not wanting Illya to be used in a fate, Kiritsugu and Irisviel helped end the Holy Grail War ritual before it could start when Illya was eight months old, sealing her memories away and allowing her to grow up as a normal girl. Shirou and Illya live a peaceful life as brother and sister, without knowledge of magic, under the care of Sella and Leysritt, while their parents are abroad. The Class Cards, malicious fragments of Heroic Spirits, later appear in Fuyuki, and they are first believed to be remnants of the Holy Grail War. It is later revealed that they were actually brought forth from a parallel world along with Miyu, the completed Holy Grail of that world. Various aspects of the setting and events are a parody of a typical Magical Girl series, and Illya, being a fan of such series, is quick to notice them. The author says that the setting should not be directly compared to that of the main franchise, saying that many of the elements may differ.