[Hazuki Tsuitachi (Kishimen)] Mahou Shoujo wa Gyouchuu ga Osuki (Fate/kaleid liner Prisma Illya)

Magical girls Illyasviel and Miyu find their mystical energies being siphoned by unexpected parasites. As the strange sensations escalate, they must endure the overwhelming presence of these invasive organisms within their bodies. What begins as a strange discomfort quickly turns into a messy, unavoidable reality for these two characters.