When Utsusu and Yume were young, they were physically and emotionally abused by their sadistic father; and now that they’re older, Utsusu swears above all else that he’ll protect his little sister at any cost. So when the girl is infected with the mysterious Pupa virus, causing her to turn into a terrifying monster that eats anything around her, the boy does the only thing he can: he offers his sister his body and flesh to consume. He won’t die, for Utsusu was also infected with the virus, giving his body the superhuman ability to regenerate from any wound, and making himself the the perfect food source for his beloved sibling. Though nefarious researchers and doctors are studying their every move, Utsusu will do whatever he can to keep the pupa inside of his sister from emerging and killing them all.
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