Trying to find this story, please help!

The story is called sphere and in it kikyo breaks the jewel again pretending to help but helps naraku escape with the jewel and is sent alone to hell. Then midoriko offers kagome and sesshomaru and the inu tachi a way to get the jewel back. They must go through a portal that leads to another world in another time. Each are blessed by midoriko like Rin really becomes sesshomaru's daughter and sango and miroku are given immortality.
They all agree to go help recover the shards and to meet again because as each of them go through they are put in a different place in that world.

If anyone can tell me if they've read or seen something like this please let me know.

Arigatou.

It was originally on ft.net or at least that's where I saw it first.

I remember something else, sango and miroku's first three children also gain immortality. After that they will just have human life spans. Midoriko also punished kikyo for what she did.if you've heard or read something similar to this please let me know.

Is it a Sesshomaru/Kagome story, and was it complete?

I think sango and miroku landed in a country that seemed to be made of sand or there was a lot of sand.

Yes it was and no it was just starting with a few chapters written.