Staff: Director: Tomomi Mochizuki, Original Creator: Sayaka Mogi, Character Designer: Maki Fujii
Voice Actors: Ibuki Kido (Yume Hasegawa), Nobunaga Shimazaki (Utsutsu Hasegawa), Kyoko Narumi (Maria), Koji Yusa (Shiro Onijima),
Studio: Studio DEEN
Utsutsu and his little sister Yume Hasegawa are close so when Yume sees a mysterious red butterfly and her body undergoes a strange metamorphosis into a creature that eats humans, Utsutsu struggles to find a way to restore his sister.
Mild Spoilers for Anyone not Familiar with the Story