The story is about some demon who wants to get his revenge on sesshomaru because at first he wanted to have his revenge on sesshomaru father. But now that he is dead, he turns to Sesshomaru. I don't remember much detail but the demon captures Kagome and turns her in to a Inu demon. He wants to trick sesshomaru thinking that he has found his mate in Kagome. But he wants Kagome to betray sesshomaru, so he can feel his pain. At first sesshomaru doesn't know that in was Kagome in her demon form. He found her in a cage, and saw her as a beauty. And he was being a nice to her and stuff. But Kagome didn't want to put sesshomaru in danger because they were being watched by that demon, so she put on an act. But when they are alone, she told him what is happening. I know it's not much but this is how much I remember. So please help me find this story. Thank you!
