Since transforming into a woman, Airi has been plagued by nightmares of being chased and choked by a masked man. She tries to find the cause but finds no clues, and unable to distinguish between dreams and reality, she is drawn to a certain hospital. A stinking smell fills the air, but she makes up her mind and pulls the doorknob, and the masked man from her dream beckons her... Though she knows she absolutely shouldn't go in, her body starts walking to the clinic and she goes for a checkup. After answering a few psychological questions, what awaits her is...