A beautiful girl, Airi, who suffers from frigidity, receives a shocking diagnosis from her doctor. It was born in this world with a special constitution that 'the clitoris is not in the pussy, but in the back of her throat'. Airi couldn't hide her shock, but she knew that by continuing to stimulate her throat, she could experience a double orgasm in her throat and vagina that ordinary people couldn't experience. After that, she is fucked in the back of her throat by many men, and Airi, who has blossomed as a throat chestnut woman, finally gets her unprecedented pleasure.
