Full Title is= Brother!InuYasha x Sister!Reader X Brother!Sesshomaru- Theory Of Happiness Yo! Me again! Basically in this story you are InuYasha and Sesshomarus (adopted) older sister. I can't can't say much more without giving spoilers, but I can say there are some feels in here. So be warned~! BOLD is song lyrics~! Side note-THIS IS THE SECOND LONGEST STORY I HAVE EVER WRITTEN SO I'M PROUD OF IT. Actually I usually take forever to finish my stories, and since this one is fairly long and complete, I'm proud of it! And that's saying something since I usually hate my work lol. AND A FEW THINGS FOR THE STORY!!! I appoligize if it doesn't exactly follow the story line and if the characters go OOC here and there, but as always I tried my best to keep their personalities the same and also follow my story line. I really hope you like this one, I worked hard to finish it ;D Alright! As always, hope you enjoy! Plot- Me~ Author- Me still~ Song- Ayanos Theory Of Happiness :D Lyrics- JubyPhonic she is wonderful! Characters- All are mine except InuYasha, Sesshomaru, their parents, and the rest of the gang from the show! Another side note (sorry!): I seriously cannot believe the amount of people who have read and said they liked this story. Seriously people, it makes me smile like crazy every time I see someone has commented on this or liked it or added it to a list :) so I want to thank you guys for being so nice and actually liking this lol, you guys are awesome :) oh! And for all those who have said you've cried I'm so sorry, making you sad was not my intentions here! Have an Internet hug and be happy! ~(^w^~)