Here is where you can find it. https://www.furaffinity.net/view/26153752/
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I found it long ago using google. So I found the developer blog. But I am not sure about it right now.
I played the Windows version but I am kind sure that had a old android version of it there.
But it didn't had the raccoon full route like in the 1st old version I played. Just not sure about Kouya's route.
"Like 2 or more years ago. I checked it now. Look like the blog do not exist anymore."
Maybe here https://www.furaffinity.net/view/27724241/