Ahiru and the Prince - Der Nußknacker: Blumenwalzer
Duck awakes from a dream in which she is a duck watching a handsome prince dance ballet. Later, she walks early into class and discovers Mytho, a student in the advanced class, dancing alone. She has a nerve-racking conversation with him before Fakir, another student, walks in. Fakir is revealed to be domineering and condescending towards Mytho. In ballet class, we learn that Mytho is dating a girl named Rue. The teacher is a cat, yet Duck is the only one in the class to find this strange. Rue is revealed to be a talented girl in the advanced class, who most of the students look up to. After class, Duck goes to the boy’s dorm to apologize to Mytho for accidentally causing him to injure his leg. Before she can work up the courage to go in, Fakir stops her and turns her away. Later that night, Duck regrets not being able to apologize to Mytho, and ponders his lonely eyes. She wishes to help him, catching the attention of the mysterious Drosselmeyer, who says to himself: “As the water flows, time has begun to move. Now, let me listen to your story!” The next morning, Fakir goes to the library. As Duck resolves to apologize to Mytho, she spies canary chicks on the dorm roof beginning to fly. One of the fledglings hesitates, and is forced to jump when a raven attacks it. Mytho leaps to catch the bird, and falls as well. To save him, Duck transforms into Princess Tutu. The bird flies away, and Mytho asks who she is. Tutu/Duck remembers that she is a duck, and runs away. The story has begun.
Aired 16/08/2002EP 1 - Ahiru and the Prince - Der Nußknacker: Blumenwalzer

Princess Tutu
In a fairy tale come to life, the clumsy, sweet, and gentle Ahiru (Japanese for 'duck') seems like an unlikely protagonist. In reality, Ahiru is just as magical as the talking cats and crocodiles that inhabit her town - for Ahiru really is a duck! Transformed by the mysterious Drosselmeyer into a human girl, Ahiru soon learns the reason for her existence. Using her magical egg-shaped pendant, Ahiru can transform into Princess Tutu - a beautiful and talented ballet dancer whose dances relieve people of the turmoil in their hearts. With her newfound ability, Ahiru accepts the challenge of collecting the lost shards of her prince's heart, for long ago he had shattered it in order to seal an evil raven away for all eternity.
Princess Tutu is a tale of heroes and their struggle against fate. Their beliefs, their feelings, and ultimately their actions will determine whether this fairy tale can reach its "happily ever after."
Note: Princess Tutu aired in two parts. The first part included 13 25-minute-long episodes, while the second part consisted of 24 12-minute-long episodes with a 25-minute-long final episode for a total of 38 episodes.