Lord of the Botanical Garden: a Dead Tree Blooms in the Beginning

In the post-apocalyptic wasteland, I inherited an abandoned botanical garden. A bucket of well water brings spring to dead trees and makes them full of life; A spiritual grass allows me to control the plant, and the strange beasts surrender. But behind this life, there seems to be a pair of eyes peeking... Not only do I want to rebuild my home, but I also want to uncover the ultimate secret of this botanical garden!