I've not had a lot of success with Manga. Reading a book 'backwards' doesn't come naturally to me(!), but I've made it through one or two that have proven themselves to be worthy reads. This one wasn't. I'd thought it might be interesting given that it features a wheelchair-bound protagonist, but it's not a story about a person with a handicap. It's a story about basketball which happens to feature a person with a handicap. That's not the same thing and the book suffers for it.
Now I know you can argue that it should not be about the handicap - and I agree that far. You can argue that it should be about basketball, and I agree that far, but if you're going to write about basketball and just put one of your characters in a wheelchair and not write about that at all, then what have you done other than to gratuitously include a person with a disability merely for the sake of it? (And that's sayk, not saky! LOL!)
While the wheelchair shouldn't dominate the story unless there's really something weird going on, like a wheelchair version of Stephen King's Christine (which I haven't read), then the wheelchair has to have a role in the story just like any other character because it's either a character or it's a cynical and cheap attempt at diversity without having a thing to say about diversity. Aside from that issue, the story was boring. It didn't offer anything new and worse, it was hard to follow what the hell was actually going on here at times, so I ditched this pretty quickly, especially when skimming through more pages didn't offer me any hope that the story would improve.