プリズマ☆イリヤ Fate/kaleidlinerプリズマ☆イリヤ PrismaIllya
A Fate/stay night alternate universe spin-off manga by Hiroyama Hiroshi.
Deals with Illyasviel von Einzbern becoming a magical girl and having to collect Class cards.
This tag implicates fate_(series) (learn more).