I bought a new phone how to convert my save from old one to new one
Viewing post in Lustful Sin (NSFW 18+) comments
Android/data/lustful.sin/files
Upload the folder with drive or share with you new phone.
Then open the game, save your progress, and close the game. Copy/paste or move the folder you transferred to your phone to the same location I mentioned at the beginning. If it asks you to replace the existing folder, accept, and you're done. (Google translator)