Treeless Mountain
나무없는 산 (original)
Six-year-old Jin and her younger sister are left to spend the summer with their aunt when their mother goes off to search for her estranged husband.
Starring Kim Hee-yeon, Kim Seong-hee, Kim Mi-hyang, Lee Soo-ah
It's a drama and action & adventure movie, and has a rating of 7 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Austria.