On one particular day at the Phantomhive manor, while jadedly browsing through reports, Ciel catches sight of a white-rabbit-eared Sebastian. Said butler mumbling, "I'm late. I'm late." as he disappears down a hole in the floor. Ciel follows and drops into... another world?! "Kuroshitsuji" characters running around in Lewis Carroll's "Alice in Wonderland"?! I'm just one hell of a white rabbit.