At the end of the 21st century, a tree emerged unlike any before it. Connected to humanity's very souls, the tree would sprout a leaf for every baby born. A leaf connected to that child for eternity, a leaf that would never age until brought to the opposing tree on the opposite side of the world. Which then a unique song will play dedicated to that person. The story follows a young man who struggles to accept destiny after his wife passes away, taking her leaf with him across the world.