After the foolish plan of humans to modify the genetic factors of plants in an attempt to control them failed, trees began to possess consciousness. On the surface of the moon, the trees grew uncontrollably and spread at an unimaginable speed, eventually transforming into dragon-like monsters that attacked Earth. The explosion brought a strong flash that enveloped the Earth, facing unprecedented disasters. Years passed swiftly, and after the attack by the conscious trees, the surviving part of humanity, in order to survive, abandoned their hostile thoughts towards the forest and began seeking ways to coexist with it. Thus, the survivors split into races that coexisted with the forest and those that remained hostile. People like Akid voiced by Ryo, lived in a desolate place called Neutral City, adhering to the principle of coexisting with the forest. Despite the harsh environment, they lived strong and happy lives until one day when Akid, along with his friend Kain, went to the legendary Forbidden Spring to fetch water. There, Akid discovered a shining mechanical device and a beautiful sleeping girl named Dola voiced by Aoi Miyazaki inside it. This accidental encounter changed the fate of that world. When Akid awakened Dora, he learned that she did not belong to this era but had been in a state of slowed metabolism for years using advanced technology. When Dora arrived at Neutral City from the past world, she was strongly impacted by the reality. People lived in collapsed buildings, without electricity or tap water, and even fetching spring water was difficult.