Synopsis: Fate/kaleid Liner Prisma☆Illya 3Rei!!

Just as Miyu was about to be saved from being swallowed by despair, all of a sudden mysterious duo that mastered Heroic Spirit Class Card system appears in front of Illya! (A direct continuation of the second act, "2wei" - manga upholds the tradition of having punny names based on german numbers and was appropriately titled "3rei", which comes from deutsch "drei" meaning "three".)