You are the youngest daughter of a rich family, you are called 'little angel' because of your beautiful appearance.

Tonight, you are invited to a dance party for wealthy families. While you were standing in a corner waiting for the party to end, suddenly a young man appeared. He has long hair, because he wears a mask, you don't recognize him as Muichiou - the second son of a rich family. He came closer and offered his hand to you

"Can I invite you to dance to a song?"