Oku Hanako’s upcoming single was aired today the JFN radio station(?).
YouTube user sasasa has uploaded the song (although I think the first couple of seconds are cut off). If you’re impatient and can’t wait until July to hear it, now’s your chance before it gets taken down.
I’ll reserve my opinion until it’s released in July, but I’ll say that I don’t think it’s any better or worse than the original, just that it’s different.