It's a good one, but the endings are obvious from the very beginning.

First time I ever played it I figured out the good ending pretty quick (spoiler: the one where Saya spread her seeds throughout the world). I was so happy for Saya & Fuminori! I rooted for them and I made sure to open this ending first, and I almost cried when I did.

From that point the other two endings were pretty much obvious, so I didn't enjoyed them much.