Did you delete the persistent file because that's what tells the game your save is there.
I would also like to ask if you could make the bar drinking minigame more responsive cause, I have been having problems where I get try to out drink yuhara but, when ever I press the arrow keys that I am supposed to press it does not respond and sometimes, I get stuck and my game freezes near end of the drinking minigame where she wins and I have to close and reopen the game again.
But besides that I like the concept of drinking minigame just need more polish and responsiveness.
In the save folder there are two files that are not save files one of these is an integrity check while the other I think makes the keeps your settings from going back to the default I'm not quite sure but this file I'm refiring to checks the save to make sure you played the game legitimately.
Plis change the minigame about is very difcult or maybe exist a bug because she finished her beer very fast