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Because of their parent's remarriage, high school student Satou Yuka, suddenly finds herself living together with her stepbrother, 23-year-old high school teacher Satou Taichi. Actually, their parents have not registered their marrriage and therefore they aren't even siblings by law; but since both parents aren't around, they end up living together! Taichi who has a very serious case of sister complex, wishes for Yuka to call him "onii-chan". But Yuka's reaction is very cold?
They look like us. They feed on us. They’re parasites – alien creatures with one directive: take human form via a host and destroy the human race from within. First seen in Hiroshi Iwaaki’s classic science fiction horror manga Parasyte, these terrifying creatures are revisited and reinvented in 12 brand-new stories drawn by some of today’s greatest shonen and seinen manga artists. But no matter who they choose as their hosts—from militia men to the seemingly sweet elderly—one thing is for certain: no one is safe from the parasites …