Aired: Jan 10, 2014 to Mar 28, 2014
Studios: Studio Deen
Genres: Fantasy, Horror, Psychological
Rating: R – 17+ (violence & profanity)
The "life-and-death sibling" story follows Utsutsu and Yume Hasegawa, a boy and his little sister who find themselves all alone. One day, 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.