It's possible that John is an important figure in the girl's life who is trying to make sense of her situation. He might be an older brother or a mentor - like a teacher or a coach - who has seen the girl's transformation and is relating the story to show how she has deviated from what was expected of her.
The status of manhwa hentai is quite controversial. It's not widely accepted in many communities due to its explicit and potentially offensive nature. Also, it may violate certain laws and regulations depending on the jurisdiction.
Well, it could also be that John at 9 years old has a special gift. In this part of the story, he starts to realize that he can understand the language of the wind. The wind whispers secrets to him about the history of his town. He then uses this knowledge to solve a mystery that has been puzzling the local people for a long time, like finding a hidden treasure that was lost many years ago.
The story might be about John who, at the time of 9:1 (could be 9 am in the morning perhaps), embarks on an exciting day. He might go to a local fair where there are all kinds of fun things for children. He meets new friends there and they all go on a ride together on a big, colorful carousel.