It will be up on GOG soon, it just takes us a bit longer to get things up on that platform. Right now it wouldn't work because the base game on GOG hasn't been updated to the new version yet.
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Thanks a lot. It's not yet there, but I will wait patiently. It's a bit of a bummer that the GOG platform is late, but I still prefer it above other platforms.
I will looking forward to this DLC, because I really liked the original visual novel. I also liked Heart of the Woods very much, so I hope you will earn enough to keep you motivated to put out these nice visual novels.