Hello coffindolle,
At the moment we don't plan to make an exhaustive guide to Chronicles. But, we can provide you with the two key points to get back on the routes.
- At the end of chapter 5, the three main perspectives are offered: Demons, humans, and angels.
- The second key moment would be found at the end of chapter 10.0 where you will definitely choose your love interest until the end of the game. These options appear as a dialogue and will determine the course of events definitively.
Finally, the best advice we can give you is to make saves at the end of the episode. In the description of the saves, both the route you are on and the selected love interest appear. This will help you know which save you want to play next.