One night a Goblin father came home gave his son a red handball. But the boy was shocked to hear that his father picked it up in front of the house of a girl called Yuki
The boy decided to return it to her.
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Next morning, he ran in the snow to a village and saw many boys and girls singing cheerfully. When he came to a small house, he saw a girl sitting alone on the veranda. She said, "I am Yuki. Who are you?" He handed a ball to her without an answer. She was very glad and said " I was looking for it. My sickly mother made this for me. Thank you very much." That gave him relief and they become friends.
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(Source: Kyowa Film)

Oni no Ko to Yuki Usagi