 If you liked
Bishoujo Senshi Sailor Moon
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 ...then you might like
A Kiss to the Prince
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It the beginning the main character, Usagi Tsukino, and the Sailor Soliders are searching for the Moon Princess. They believe it to be Sailor Venus, but later find out it's someone else. The girl in question does not realize she is in fact the real princess. The beginning of the story deals majorly with finding the princess and the her coming to terms with her duty.