Kagari suggests that he kill her to save the world , but Kotarou can not bring himself to do it .
The song of destruction begins again , which causes Kotarou to begin transforming into a tree - like creature as a large tree grows around Kagari .
Kagari suggests that Kotarou kill Kagari to save the world , but Kotarou can not bring himself to do it .
The song of destruction begins again , which causes Kotarou to begin transforming into a tree - like creature as a large tree grows around Kagari .