This is not really precursor I don't know how they said it was but it wasn't.
Very first chapter was pretty cool it was the only "precursor"-esque to the entire series that it was a chapter 0 and Adam was a female basically Eve and he fought another Adam(Adam C)apparently she is a robot girl. Their fight was pretty badass and she was as stupid as Eve being extremely airhead it and not keeping anybody memorized . After the first three or four chapters it turns into a more like a special episode of an anime series where they go into The Life and Times of
whoever the hell they want to follow. Well to be fair it might be a precursor like I said the first three to four chapters were him meeting gravity girl the tinkerer chick from that one town that can put anything together and whatever combination she wants but that's basically like I said the first three to four chapters. Chapter 5 through 6 were some other black spot bullshit thing about some stupid some rich guy who got lost in a black spot whatever it's boring. Now technically there's chapter 7 and chapter 9 I don't know where this 9 comes from but those are the life and times that I'm talking about one follows the the basic crew you know Cruz, Father(Adam B), and Eve doing their bullshit and another one is following the girl assassination Squad doing some random mission that they fail again. This has got such a low score because it was boring and didn't really keep my attention like the "original" series I would only recommend it to people who want a 100% stuff, otherwise I would say skip it because it's it's not necessary at all.