Hey hey! Thanks for checking out the game :3 I'm sorry to hear you're having problems with crashing :(
I've not had any crash reports before and didn't experience any myself while testing, so I'm not sure what could be causing that to happen >.< Since it's occurring when you make certain choices, it could be that your system is somehow struggling to load the next scene. Is it an older or slower computer? Also, which system are you playing on?
Does it happen each time you pick certain choices if you save and try multiple times? Or is it more random?
You could try deleting your save data and starting over in case something is corrupted, but I'm not sure if that would help at all. You'd have to start again from the beginning but you could use the force skip option to skip all text and get back to the point you were at fairly quickly. I don't know exactly where your save folder would be located in order to properly delete all the data, but on my windows PC it's located under
C: > Users > MyUsername > AppData > LocalLow > Melancholy Marionette
You then delete the save data from the Apartment No.9 Folder.
(AppData folder might be hidden by default, so to access it, you need to enable hidden folders to be viewed by going to Control Panel > Appearance and Personalisation > Folder/File Explorer Options > Click the 'view' tab > Tick the box 'Show hidden files, folders and drives' > Click apply and ok. You probably don't want this on all the time, so once you've located and deleted the save data, it's probably best to go back into those options and untick the box to hide the hidden folders again.)
The only way for sure I'd be able to find out what's causing the crashing though is if I were to send you a development build, for you to play that to the point where the crashing happens, and for you to send me your player/error logs so I can see what sort of errors it's throwing up as it crashes. We can do that if you want to, but there's still no guarantee I'd be able to fix it for you even if I could identify the cause >.< Let me know if you want me to send you a development build though, and where to send it, and I'll get it to you and tell you how to generate report logs :3
Sorry you've had such trouble with it :( It would be great if wiping the save data and starting over happened to fix it, but it might not >.< Good luck though! And thanks again for playing the game :3