In order to solve the mystery of 'acquired feminization', a strange disease in which a man changes into a woman's body, we interviewed a former man who was said to have developed feminization.Ever since he was a man, he used a smartphone app to transform his face into a woman, uploaded it to social media, and received likes. A male college student who is dangerous from the beginning.In other words, there is a tendency to fall as a female. She said, "It's disgusting to have sex with a man, isn't it?"