The fan fiction i am looking for has heaven, hell and earth and each one has a couple that is in charge of it. Kags and sess have earth
Sango and kyoshi ( i think thats what his name was) have heaven and there is this other girl i cant remeber her name but her and her mate have hell. Kagome had met this girl overseas and the girls father kills the rest of her family. They girls also travel back and forth between times and sing songs on the radio. So there are lyrics in it as well. I also remeber that that on certain chapters each girl comes into power. Hope this is good enough. Thank you