Selena Midford is Elizabeth's older twin sister. She's known Ciel Phantomhive since they were young. She even knows about Ciel's mysterious butler, Sebastian, who is one hell of a butler and then some. Unfortunately for Selena, Lizzie is betrothed to Ciel. Selena holds a secret that threatens Lizzie's happiness and it involves Ciel. Selena keeps it hidden deep. So, when Selena meets her mysterious fiancee she's never met or heard of before, will Selena finally own up and tell Ciel she knows everything about him and Sebastian?