Yui Matsuno, a 22-year-old esthetician, is the victim in this final installment of the hit series. Confused and asking, "What's happening to my body?", she undergoes a transformation as her uterus—the second brain—awakens and takes control. The esthetician's fingers gently explore her sensitive erogenous zones, while the doctor's fingers precisely target her cervix (porchia) erogenous zone. Regardless of her own will, her uterus blossoms, pushing her beyond new boundaries.