That is very simple and lightheaded experience that crosses Code Geass with Alice in Wonderland. Despite rather simple premise and very basic execution. It is very fun and overall pleasant experience. Nunnally is basically Alice here and various Code Geass characters fill the roles of various Wonderland denizens. I would not spoil who is who in this one, however all of them seem fit their roles rather well. Overall it is funny and creative story. Characters manage to both act very in character for themselves and be somewhat unpredictable at the same time. Even if you are familiar with Alice in Wonderland and other Lewis Carroll charactersthis show will still manage to surprise you. You will keep guessing when this or that character will appear and who will it be.

Overall I can recommend it as a simple relaxed break of pace story.