In the continuation of Fate/kaleid liner Prisma☆Illya 2wei!, Illyasviel von Einzbern's life has spiraled into complexity ever since she embraced the role of a magical girl alongside Ruby, embarking on the quest to secure the seven Class Cards. Amidst forging new alliances with individuals like Miyu Edelfelt and encountering her magical doppelgänger, Illya's days brim with surprises. Even a seemingly relaxing beach trip transforms into a magical escapade, thrusting her into a whirlwind of magical conflicts, love potions, forays into the world of 'boys love' manga, and various other enchanting distractions. However, these events merely set the stage for her ultimate challenge: the retrieval of the elusive Eighth Card, marking what could be her most perilous mission yet.