The Golden One \Ciel x reader x Sebastian

you are Elizabeth's best friend who she can trust. Elizabeth dragged you to her fiancés manor, who is ciel Phantomhive, to stay for 3 weeks to visit. while staying, Ciel and his butler, Sebastian become attracted to you. after a few adventures with ciel and Sebastian,they suddenly start calling you "the Golden One" at party's and where ever you visit, instead of your original name. with a little snooping around and a bit of help, you try and find out why they call you "the Golden One".