In order to approach the mystery of the strange disease’acquired feminization’that a man transforms into a woman’s body, we interviewed a former man who is said to have developed feminization. He was a student attending a boys’ school in Tokyo, but he was the only one who became a girl because he became a female. As a matter of course, the virginity has been lost due to such treatment in the class. Since he has only experienced rough orgy and made a licking remark that “sex is not so comfortable”, a professional teaches serious sex.