 If you liked
Zero no Tsukaima
|
 ...then you might like
Magi: The Labyrinth of Magic
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Magi and Zero no Tsukaima are two similar short series which are set in a medieval fantasy world filled with magic. Both series have a similar plot where characters must overcome difficult situation to regain peace in the kingdom. Zero no Tsukaima is more on the ecchi-harem side, but Magi does have some big-breasted characters. If you love one of these anime, you'll love the other.