As some of you might know Google has begun to roll out a new version of Chrome for Android (79.0.3945.79) about 5 days ago. This new version of Google chrome has caused a massive removal of app local data for many Android applications.
Lust Epidemic and Treasure of Nadia are both affected by this bug meaning that if your device has been updated to Chrome 79 your save games have likely been deleted by the update.
Google is now aware of this bug as it has been a reported issue for lots of Android applications. They are in the processes of fixing the bug, however we have decided to move forward with our own solution to restoring the affected users save games.