Abandoned by their abusive parents and with only each other to depend on, siblings Utsutsu and Yume Hasegawa find themselves led astray by beautiful red butterflies that have appeared in their world. Unbeknownst to them, these crimson winged heralds trumpet the beginning of a cannibalistic nightmare—a mysterious virus known as Pupa is about to hatch.
After succumbing to the full effects of Pupa, Yume undergoes a grotesque metamorphosis into a monstrous creature with an insatiable desire for flesh; Utsutsu, on the other hand, is only partially affected, gaining remarkable regenerative powers instead. Reaffirming the resolve to keep the promise he made to himself years ago, Utsutsu is willing to sacrifice everything in order to always be there for his precious little sister.
Pupa tells the story of a loving brother's desperate struggles to save his sister while protecting the world from her uncontrollable hunger.+ More
Characters & Voice Actors

Hasegawa, Yume
Main
Kido, Ibuki
Japanese
Hasegawa, Utsutsu
Main
Ise, Mariya
Japanese
Arita, Sisters
Supporting
Kurosawa, Yurika
Japanese
Arita, Yuuhei
Supporting
Mikami, Shiori
Japanese
Hasegawa, Sachiko
Supporting
Noto, Mamiko
Japanese
Hotoki
Supporting
Tsuda, Kenjirou
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