She looks sad. Maybe they had gathering and it didn´t go well.
This picture shows the last days of summertime. She´s a big girl who need to go to school. And she is thinking responsibilities in life because she will be an adult soon.
This must be in Finland and not like from where I´m from which is Louisiana. If this was the summertime in Louisiana we wouldn´t be wearing long sleeves or like you couldn´t survive in the heat with long sleeves and long dress. Even though I know it´s like different time period.