According to the Kuroshitsuji website, there are 6 OVAs included in the DVD releases.
DVD 2: Ciel in Wonderland (Part 1)
This re-imagines the cast of Kuroshitsuji II as characters in Lewis Carroll's Alice in Wonderland story.
DVD 3: Welc... More
More Seasons
Characters & Voice Actors

Abberline, Fred
Supporting
Aberline, Edward
Supporting
Agni
Supporting
Anafeloz, Hannah
Supporting
Asman Kadar, Soma
Supporting
Baldroy
Supporting
Blanc, Angela
Supporting
Cainz, Drocell
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