Ultraseven: S1 E31 - The Flower Where The Devil Dwells Ultraseven

Young girl Kaori who fell for unexplained thrombocytopenia showed a bizarre behavior seeking blood from that night. The cause was the space bacteria Dallie which has invaded her body was eating fibrinogen in the blood. Dan infiltrates into Kaori's body by reducing his size and tries to get rid of Dallie, but he is forced to struggle in the "unknown world" of the human body.