Golden Laughter(2000)

Sori gets scolded by her grandfather because she soaked the blanket last night. The old man is angry with mixed emotions, but in the end, he feels sorry for his granddaughter. Sori, who cannot speak for herself, can only repeat what others say... The postman delivers letters to empty houses and becomes increasingly tired. Sori plays with a scarecrow. The postman and Sori, who meet at the stream, spread their own laughter to the mountains and rivers under the sunset.

Official site