I wonder if the encore is really that meaningful. Maybe it's just some diary and all. Well I'm just 10 chapters in and there's hardly any explanation on what the encore is other than it's like the philosophers stone that contains all records
Bittersweet ending incoming.
Prediction:
Her enlightenment is that MC will not betray her ever and earns her trust. Since she was betrayed, right? She wants to feel loved and not betrayed one last time for enlightenment.