I just checked analytics, the file has over 100 downloads on Android and no other reports of issues. Make sure your device is up to date and try again, the issue is your device.
the virus alert is just a false positive, there is no actual virus just tell you device to run it anyway and you will be fine. This is a common issue with H-games. generally it's because of something like a security certificate from an unknown place. You are safe! :D
