Well, without knowing the specific content of 'ch 7', it's hard to be exact. But generally, success stories might involve technological breakthroughs. Imagine a group of inventors in ch 7 who developed a new, clean energy source that revolutionized the way we power our cities. It could also be about artists who got their big break in chapter 7, perhaps a painter whose work was finally recognized and exhibited in major galleries around the world, leading to a significant boost in their career.
I'm not sure specifically what the 'ch secret story' is as the term is rather ambiguous. It could be a story related to a person or place with the initials 'ch', or it could be some kind of code - like name within a specific group or community.
Well, 'CH' in stories might represent a code or abbreviation for something unique to that particular narrative. Maybe it's a secret organization, a hidden location, or even a special power. Without more details about the story, it's hard to be sure exactly what it means.
I don't think so. There haven't been any official announcements or indications that the HxH manga will continue. But you never know, maybe there'll be a surprise in the future.