Bishoujo Senshi Sailor Moon, Princess Tutu Recommendations
I'm actually quite surprised that Sailor Moon isn't already on Princess Tutu's recommendation list (and vice versa). Ahiru and Usagi are very similar to each other. Both of these girls are pretty clumsy and make some rather strange mistakes, and both find themselves falling for a boy. Both must work to get their love's memories back, and they transform into magical girls to fight and save the day while somehow balancing schoolwork and social lives on top of that.
they both have to do with the collecting of hearts in order to feel love. the heroines have the sa,e feeling too.