I know when the game was still coming out the devs said they were working on a guide that they could sell but now apparently it doesn't exist? I'm sorry to say I don't have a guide for you but I think if you go back about 10 months in the main pages comments, it was very active back then because the game was just released and I think you can find a lot of help there. There should be people asking how to unlock some CG's and also answer's and possibly screenshots of CG's you might not have.