The Princess Who Became a Mermaid

Princess Amara is the daughter of a king in Land Kingdom and faces difficulty living with her step-mother and step-sister Alena who treat her like a maidservant. She meets Prince Triton in one their family picnic trips and friendship is born between Triton and Amara. However, Alena likes the handsome Prince Triton, who will become the Princess of the Ocean Kingdom?