 If you liked
CLAMP in Wonderland
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 ...then you might like
Mahou Shoujo Madoka★Magica Movie 3: Hangyaku no Monogatari - Magica Quartet x Nisioisin
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Both are crossovers between different anime. While CLAMP in Wonderland features anime made by CLAMP and is more like a music video, Magice Quartet x Nisioisin is collaboration between Mahou shoujo Madoka Magica and Nisemonogatari and is more of a comedy. Both have short episodes.