Sorry I'm so slow to respond >.< I've been going through a bad patch lately and haven't really been online. Thank you so much for checking out the game though!! :3
I'm really glad that you enjoyed your time with Orange Blythe :D That sucks so much that you ran into an issue with saving though because it definitely shouldn't happen >.<
As far as I'm aware, it's not an issue that everyone has encountered, and I personally didn't come across it when I was testing the uploaded game build on both my PC and an ancient laptop, BUT... I do know that it's an issue that exists in some of my older games made with Naninovel in general T_T
Unfortunately, I have no idea what actually causes it to happen because when I've encountered it in the past, it's been seemingly random >.<" Much like some of the other issues such as the wrong background loading outta nowhere when you load a save!
With any luck, it's something that just happened to be a bug in the old software. I'm going to have to pretty much remake the game from the ground up whenever I get around to adding Blue Blythe's route, so that'll probably mean updating to the most recent version of Nani. Hopefully, that will at least resolve the save problem you encountered :3
Thanks again for playing!