Miki was initially plain and reserved, but after being parasitized by a mysterious alien lifeform, her physical abilities dramatically improve. As her powers awaken, she gains confidence and gradually develops stronger sexual desires. However, as the parasite's infiltration progresses, there are times when she loses control of her body during sleep to Ridley, the parasitic entity. Ridley survives by parasitizing local organisms and taking control of their bodies for defense and reproduction. Immediately after parasitization, the host loses consciousness, but as the infection deepens, Ridley begins interfering with the host's movements and thoughts. Determined to uncover the truth about Ridley before losing complete control, Miki confronts its superior. Will she ultimately be body-jacked by the parasitic lifeform?