"I don't feel anything. Just put it in without permission?" A girl looks bored as she plays with her smartphone, waiting for a man to ejaculate. The insensitive girl has no qualms about selling herself to men, and has sex with them with a cold attitude from start to finish. One day, she meets an old man who knows everything about the female body...!? The girl, who had never felt anything before, is stimulated by the man's tongue skills, and for the first time, she has an orgasmic experience that makes her realize the weakness of the 'female body'! The day the insensitive girl first discovered pleasure...!