Oh how heartbreakly sweet. I really liked the poem as you created a story of Sesshoumaru and Kagome's love around it. Oh how sad and true that so many died back then from what we now call pnemonia. When I read where she died I felt tears burning my eyes and then they fell when Jaken went to call on his Lord only to find that he had went to be with his mate in the hereafter. Good job with this!
This was heart-wrenching but so well done! My only comment would be that the poem is distracting from the story itself. Maybe move it in its entirety at the bottom for those who have never read it? Otherwise, this was really a beautiful read.