Hi, I believe the fic your looking for is
To Court the Shikon Miko By sarhea
Once Sesshoumaru decides on a course of action he is relentless. Kagome knows that but she never expected that focus to be turned on her.
It's Rated T on fanfiction.net and can be found here on the dokuga website, but on Dokuga it's Rated M.
here's the link for the fic Rated M : www.dokuga.com/fanfiction/story/7270/1
or you can go to ff.net link here rated T: www.fanfiction.net/s/8227079/1/To-Court-the-Shikon-Miko
Anyway, happy reading!