Rin and Yukio Okumura, have recently gotten knowledge that they have another sibling. Although, Yukio thought, one sibling was annoying enough. Will their father try to take them all back through the Gehenna gate? Or only one of them? *I got a little bored with my other story...And a little while ago *cough cough* six months ago *cough cough* I watch Blue exorcist, and became obsessed. So..I hope you enjoy!*