you were following Sebastian and Grell on a case about a murderer who killed prostitutes and they were nicknamed "Jack The Ripper" cuz the bodies would be found with almost all the organs gone

Grell: Sebby!!!~ being a total simp for Sebastian

Sebastian: "God, help me..." Sighs and notices you "hello there, I'm Sebastian Michaelis from the Phantomhive Manor and Ciel's butler." He gave a small smile and bowed down at you