I'm sorry for making this a technical comment, because there are many things in the game that I want to praise, and I hope to do so in the future. But I feel you really need to check and improve the way you are programming/coding the game.
Now, for full disclosure, the laptop I own is quite old. However, this is the first AVN I've played on it that has crashed, and multiple times at that. At first it happened during the Miss Rose scene, and I thought it may have been a combination of having music, animation, and sound effects going on at once, however then - the next day for me, so the laptop had time to "rest" and wasn't overheated or anything - it started crashing on the conversation at the Cafe scene. This to me, who knows nothing of programming, makes me think it may be a thing with the way you are making the music loop (like, the first time the track plays, it's fine, but it may start "accumulatinh" loops that make the program collapse, if that makes sense). I'm not one to obsess over graphics, but I have played many games with better ones that do not crash, and even the animations they play run smoothly, so I can only conclude it's an issue with the program. I tend to make a massive amount of save files, and I'm on page 50 for this game, however that has never given me issues on other renpy games, so if that's the issue there may be too many unnecessary information coded into each save? Of course, the game having a virus within its files is also a possibility. I would recommend you check it thoroughly and try to make it kinder on the processing to stop it crashing.