What do you think of my manga plot?

I think that it's a very interesting plotline, and it could grip a wide variety of readers. However, it is very complex, and you'll have to think of a way that you can present it without it being too confusing. Do you plan to introduce the subplot on the first few pages, or do several manga on the lives of the parents and then others on the kids? Personally, I think that the latter is mare appropriate because otherwise you may just confuse your readers. Good luck with your manga!