This is a game, not a book. It is not even Visual novel. As it stated in tags it is a sandbox (A sandbox game is a video game with a gameplay element that provides players a great degree of creativity to interact with, usually without any predetermined goal, or alternatively with a goal that the players set for themselves. well this is definition I found in wiki, but I already knew that). So normaly in sandbox there are a few posibilities for example to discover new neighbourhoods, or they are open at ones because in sandbox you can do and go whenever you want.
And infos or at least hints about npc and their activities could be provided for example by those nps.
I kinde like the art and story in this game, but some things are stuped and made just for the GRIND, ahm STUPID GIND.