Yoh's sister and Ren's wife, Annie the Onis and the Tenshis summoner

Hi, everyone. I didn't know how to rate this story, so I rated it Rated: T. Summary: Yoh has a little sister, who can't handle her powers. The Spirit of Earth came to him when he was a baby. His sister and Ren are dating and his twin brother, Hao is changed thanks to Annie, his sister. Why is there a mark on Annie's chest? Read to find out what the story is all about right here.