Waiting An Eternity

This is a story with the Character Error Sans (creator is Crayon Queen) and my own creation (Known for the story as Y/N).
The character is a skeleton monster that can use magic freely and in many ways. They have A long bone tail that looks like a spine, with a heart shape at the end. They have claws on their hands and feet. They are a creature born of chaos, a Goddess of sorts.

This is about the 2 finally getting to meet.