Blood Loop

Sinopsis

Coming from a mysterious place, the gray and red creatures collide on earth. They manage to transform as many humans as they can into their own kind. Xiao Cheng and Zheng Yiren, best friends from childhood, were transformed into red and gray respectively. Standing on opposite ideals, faced with this collapsing world, what choices will the two brothers make?

(Source: Mangatoon)

Sinopsis original de AniList.

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