Because of a prince's curse, a frog became a frog and lived in a frog.

Because of a prince's curse, a frog became a frog and lived in a frog. One day, a princess was playing ball and the ball fell into the frog. She couldn't run. The frog said, "I will take your ball out of the water, but I have to go home with you." The princess accepted the frog's words and went home.

Freed from the curse and turned into a prince.