In the year 777 of the Calamity Era, the Earth has been experiencing vicissitudes due to the invasion of alien species. A hundred years before facing attacks from other races, human beings discovered the key to victory by chance at the ancient ruins of an alien civilization - seven stones similar to agate. After humans brought them back, the earth finally regained its vitality, and these seven stones allowed certain humans to gain access to the most primitive natural power on the earth. With the combination of technology and supernatural powers, With the same development, mankind has been able to gain a foothold in the universe. However, due to the uniqueness of the adaptation of the seven "Nature Stones", the seven major families with the ability to adapt to nature have assumed the important task of protecting the earth. The Human Alliance has adopted the policy of adaptation and diffusion to address this issue, and genetic experiments have also made breakthrough progress in recent years. For this reason, the Alliance has specially established the Twin Heart Academy to cultivate a new generation with the power of nature.
Purpose: Protect nature! ! !