“Just as he was entering high school, Nanaki Koga experienced a certain accident and fell into a deep coma. After two years, he finally woke up. However, he found that the world had changed. While he was unconscious, a sudden craze hit Japan: crossdressing. Now the newest fad, approximately 90% of Japanese people dress up as the opposite gender.”
At that point, it’s not even crossdressing. It’s a switch in which way of dressing is gender-conforming.