With the end of the fourth season of Fate/kaleid liner Prisma Illya 3rei!!
The work comes from the property that deals with the alternate world setting from the Fate/stay night universe as written and illustrated by Hiroshi Hiroyama.
Property concept: Spin-off of Fate/stay night with Illyasviel von Einzbern as the protagonist, living an alternate life as a school girl.
The series began in 2007 and has run several short-run series with each working its own progression and theme while tied to the larger work.