Oh, it's that simple? Not so happy at having to do two playthroughs but atleast its only two. Thanks.1st playthru will get you the bad ending, start a new game plus with that file and pick the new future option. This will unlock new story event featuring a book image. Complete all of those and you will get the message: “At the crossroad of destiny (chapter 3) defeat the great enemy before you and approach the Malice. Call out it’s name to seek the new future you desire. Take a good look at your supporters at that time and notice who is missing”
Doing that will put you on the good ending route.