Kiseijuu

They arrived in silence and darkness. Their home is among the stars, and they hunger for human flesh. They are everywhere. They are parasites, aliens who must enslave humanity in order to survive. Once they hit a victim, they can take any form they choose: monsters with giant teeth, evil demons, creatures with blades instead of hands. But most hide their form behind ordinary human faces, so no one knows their secret. Except for one high school student. Shinichi Izumi fights for control of his body against the parasite Migi, who has taken over his arm. But will he be able to warn humanity of the horrors to come?