Ciel x Detective!Reader - Unravelling Mysteries

Tired of the shame brought daily upon your family, you see revenge. As a budding young detective in London, you somehow convince Ciel Phantomhive to allow you to accompany him on his next case, however, things may be be a lot harder than you imagined. With children in danger and a martially-talented butler who seems to never leave his side, would you really be able to ruin everything he stood for?