It is impossible for me to choose just one. It was even difficult to narrow it down to these because there are so many excellent stories. I was going to include A Sentinel Mother, Cultural Differences, and Blood Stained, but I see they are already listed.
In Death, Trust Me, as You Didn't in Life by Kanna37
Rated: MA (NO YIMS!)
Two people, separated by death, then reunited by the same, find that the old saying 'Death is only the Beginning', is true. A love story told across the boundaries of death and time - and one that conquered both. Dedicated to TruGemini - Happy Birthday, love! Winner of 13 awards including 1st Place Best Act/Adv, 2nd Place Best Kagome Portrayal 3rd Quarter 2010, 1st Best Romance 1st Quarter 2011, and 2nd Best Action/Adventure IYFG for 2nd Quarter 2011
www.dokuga.com/fanfiction/story/2787/1
The Battle of Heart and Land by MissKatt
Rated: MA (NO YIMS!)
Six years after Naraku's defeat, the Eastern lands have declared war on the West. Sesshoumaru's mother learns of the their numbers and, concerned, requests the help of Inuyasha and the gang. However, not all is right with Kagome and Inuyasha. (2011 4th Q. 1st pl. Best Action/Adventure&1st pl. Best Romance! 2012 1st Q. 1st pl. Best Dark/Horror! 2012 2nd Q. 1st pl. Best Drama! 2013 1st Bi-Annual. 2nd pl Best Angst!)
www.dokuga.com/fanfiction/story/6403/1
Vying for Dominance by ShadowsWeaver1
Rated: NC-17 (NO YIMS!)
**Complete** Woken from a dream of heated passion and coursing desires, Kagome finds herself caught up in an ancient game of blood and lust. She must fight or she will die, vying for dominance and the rights to take her mate.
dokuga.com/spark/story/6918/1
The Once and Future Taiyoukai by RosieB
Rating: PG-13
Voted Best Romance: Other by the IYFG for 2007! The well was supposed to be stable. It was supposed to send her to Inuyasha. And it failed. Now, Kagome's even farther into the past and she must depend on a young Sesshoumaru, who has no idea of what their shared future holds. But then, neither does Kagome. Now COMPLETE! Yay!
www.dokuga.com/spark/story/5288/1
Life on the Island by Maiko Anna
Rated: X (NO YIMS!)
Summary:
Sesshomaru is responsible for a chain of islands reserved for demons, and he finds himself discovering that a human, Kagome, has captured his eye. His beliefs about humans are thrown to the wind as he discovers how alluring they can truly be.
inuyasha-fanfiction.com/viewstory.php?sid=1105&chapter=1