@Sarah: Is this it?
Tales From the House of the Moon » by Resmiranda
Kagome, now in college, discovers the tale of Sesshomaru and Rin. Grief can be a prison, but the bonds of love are not easily broken. What is the truth behind fairytales?
Inuyasha - Rated: M - English - Adventure/Drama - Chapters: 42 - Words: 324,336 - Reviews: 4353 - Updated: 2-18-06 - Published: 12-12-03 - Kagome & Sesshomaru - Complete
An amazing piece of fiction, it's definitely one of my favorites that I read over and over.