Didn't finish playing this because it made no sense. This guy is in high school but he owns a luxury sports car and lives by himself in a luxury mansion. The dialog was really hard to follow.
Better off just releasing this in your original language until you can find or afford a translator, Dev. You won't gain any supporters doing it this way, that's for sure.
My android port have alternative save location, so don't worry about starting over.
My port have textbox opacity slider, you can find it in preferences.
If it says unknown developer or something like that just press install anyway