The Tree Of Beginnings

This story takes place in Japan on a mountain that is shaped like a tree where all rare animals live. Ever, the president of her school. Ever and Tamaki were friends since they were in kindergarten. They both secretly love one and other. Ever gets kidnapped and Tamaki goes to find her. She gets taken to a mountain called The Tree of Beginnings. Tamaki gets swallowed by his weird creature. She then meets a mysterious looking pink creature, she calls Mew. Mew takes her to the center of mountain and attempts to help her. Mew Suddenly gets sick and the Crystal star disappearing. Tamaki is saved. How is Ever and Tamaki going to save Mew, before the mountain and everything in it, is gone?