Picnic (2014)

Soo-min lives with her mom and her autistic six-year-old brother in a small village by the sea. Even though she is a child herself, she has to take care of her little brother. Her only joy in life is reading comic books under the blanket. One day, Soo-min’s brother ruins her favorite comic book so she makes a big decision. She decides to go on a picnic with her brother where she leaves him in a Buddhist temple and walks away.