Kiri no Naka no Shoujo(1966)

Kiri no Naka no Shoujo

Natsuko is a happy child. Thanks to her father, working in the milk industry, she has a good life. But, when during a trip to Hokkaido, she crosses paths with a mysterious girl in the mist, she could discover hidden family secrets... How will it change her life ? What dramas did her mother live through ? In the span of a few months, Natsuko could grow up far quicker that she imagined...

(Source: Akata, translated)