thanks but how can I change backgroun music volume it's so loud?
Viewing post in Bloodstained Flowers English Patch comments
I don't think you can do it through the VN. However, you should be able to lower the volume on Win10 by doing Speakers -> Volume Mixer -> Bloodstained Flowers (VN needs to be open) -> Adjust the volume.
Note that this is for you alone, though. If you're planning on streaming it somewhere, you'll have to edit the volume in editing yourself.