After learning about the legend of the Eternal Tree, Nodoka, Chiyu and Hinata find the tree in order to make a vow of friendship under it. However they are shocked to discover that the tree was killed during a recent storm. They also meet an old man who tells them that there is no such thing as eternal friendship. The girls learn from the tree's spirit that the man's name is Tetsuya, and that he made the vow with his two friends Fumi and Hideo 50 years ago. The tree spirit asks the girls to find Tetsuya's friends and bring them together before the tree is cut down...