 If you liked
Soredemo Sekai wa Utsukushii
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 ...then you might like
Genjitsu Shugi Yuusha no Oukoku Saikenki Part 2
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Both anime focus on economical and political aspects of the kingdom, both have romance elements and feature fantasy world with magic present. Main difference is in one of them we follow genius protagonist and in another we follow fiance of young genius prince that is supporting him.