what is the title of this anime?

im looking for a romantic anime series that has a pink haired girl that changes her personality when she is shocked or suprised.she also change when she blush because of a guy. there's also something about a princess on a bridge and sour candy. PLEASE HELP ME!!!!!
 
Moka from Rosario + Vampire comes to mind

character profile >>> http://myanimelist.net/character/3861/Moka_Akashiya

Synopsis
By a bizzare coincidence, Tsukune Aono has accidentally gotten himself admitted to a youkai academy, a school attended by monsters. Just when he thinks he'll run away from there, he meets the beautiful girl Moka and his mood turns ultra happy. However, she transforms into her true form when the rosary on her chest is taken off, she's a super vampire!
 
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