I found two versions of the story, one on Spark and one on Fanfiction:
www.dokuga.com/spark/story/7217/1
To Wash it All Away by Crystal Echoes
The opportunity for great love comes with great risk and the possibility for great lost... love anyway. This story is dedicated to those who risked and lost.
Rating: NC-17 - Universe: Alternate - Status: Incomplete - Genre: Angst/Drama
Updated: 04-15-08 - Chapters: 11 - Reviews 41 - Words 67,920
www.fanfiction.net/s/4464109/1/To_Wash_It_All_Away
To Wash It All Away - Crystal Echoes
I would have been spared the pain, but I would have missed the dance. A dedication for those who have loved and lost.
Inuyasha - Rated: M - English - Angst/Romance - Chapters: 10 - Words: 70,700 - Reviews: 80 - Updated: 2-3-09 - Published: 8-10-08
Not sure which one you are looking for so I put in the links for both.
Hope this helps!