Jun Ueda, an expert on sex hormones, has successfully developed an epoch-making hormone amplification, "phorbitin UD", but an accident will result in a successful trial. A large amount of "phorbitin UD" was administered to the body of the subject, and it was transported to the emergency room. Because of the secret project, Natsumi, a researcher who was involved in the trial as Ueda's assistant without being informed of the details, was greatly upset by seeing the subjects who were red and convulsed the face.