Fate/Kaleid Liner Prisma Illya 2Wei!

Illyasviel von Einzbern spends a typical summer with her best friend Miyu Edelfelt, enjoying some downtime after collecting Class Cards. Their break is cut short when they're abducted by Rin Toosaka and Luviagelita Edelfelt while out with friends. The Clock Tower informs the magical girls that unsealed mana is still spreading in Fuyuki City, prompting them to investigate its source. Illya soon discovers she's split into two people after casting a spell, leaving her wondering about the implications of her duplicated form.