This OVA which was titled "Sono Shitsuji, Kougyou" is the extra episode included in the DVD. It was released on September 30th.
The OVA was pretty much about the stage play the Funtom Company organized for the children. However, three days before the play Ciel received news that the performers were met with an accident thus couldn't make it in time for the presentation.
So what Ciel do when he is in a pinch? If you are familiar with Kuroshitsuji you know exactly what's coming:
Obviously Sebastian will made the rest of the casts to rehearse Hamlet, including Ciel himself. Phailed... Anyway, as one would have expected it was a stretch of comedy and drama from the usual casts of the three servants, Lau and Ranmao, Soma and Agni, Undertaker, Elizabeth and Grell.
I bet we all can pretty much guess that the play turned out to be a total disaster but in a really good kind of way. I enjoyed it at least and was at awe when Sebastian attacked Ciel although it wasn't in the script because of the sudden improvement in animation.
The moral behind the story: revenge is wasteful. When the curtain falls down again, you'll be left with nothing. Thankfully though that Ciel has no intention of letting go of his revenge ^__^
At the end of the OVA, they showed us the preview for second season of Kuroshitsuji. Gintama anyone?