Ibara Phantomhive is the younger twin sister to Ciel. But, as close as the twins are, she has a secret Ciel cannot find out. Why does his demon butler take special care of her even though they don't have a contract? Story follows the anime/manga Black Butler somewhat with bits of Disney's Frozen thrown in with my own bits. Will end up being OCxSebastian and may have a lemon or two added. I apologize for any OoCness and partial AUness. Hope you enjoy!