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Utsutsu and Yume Hasegawa have been living all on their own. One day, Yume sees red butterflies and ...
Completed || Manga
Summary ~
Hasegawa Yume and Utsutsu encounter strange red butterflies one day. Which turns Utsutsu's little sister into a huge monster that eats humans. The only way to get his sister back is to make a deal with the people possibly behind it. Utsutsu uses his own body to feed his half-monster sister now.