The Akatsuki's Little Spy

Kasumi is the owner of three powerful and destructive kekkei genkai. As a child she was experimented on by Orochimaru, barely surviving the countless procedures. Later she is taken in by the one and only Hidan, and she joins the Akatsuki with him as his "sister". What happens when she is sent on a mission to infiltrate the Hidden Leaf Village and is placed in team 7's care.