Himokura Tetsu is a scientist who specializes in the study of parasites. His right arm is fitted with a robotic hand which is not known how it came about. He then is recruited to solve a case with scientific methods.

Tetsu is a scientist who studies parasites earnestly out of his home laboratory. His assistant and he work on these diligently. He is intelligent and an expert in the subject matter, but he is also abetted in his field by his prosthetic arm. An official from the central government visits Tetsu. He is there to recruit the scientist for work on a mysterious organism.—aghaemi