There is an error in which you can loop events and get rewards where you can abuse to get more money.
I only got 3 endings, can I get a walkthrough to get the 4th one?
I actually got all endings. It was pretty straight forward. And again, the VN has looping errors in which events get repeated and all. Sometimes the buttons are there but invisible, so when you click somewhere ,it activated the next scene and skipped the current scene.