World’s Best Little Sister

So - I’m Rosa, ten years old, and I’m just the little sister here.

The youngest person in the family is always the most spoilt, right?

As if! Ten-year-old Rosa is constantly having her older sister Johanna and big brother Matti’s hand-me-downs forced upon her, and is not taken seriously at all. Condemned to be a baby for life - it’s so incredibly annoying! But when their parents head off to a family party and leave the three children home alone for the night, Rosa gets her chance: the wild party Johanna throws goes completely off the rails, as does Matti’s horror film night, after which no one dares go to sleep. Of course Rosa will do her best and rush to help them! Somehow having siblings isn’t such a bad thing, is it?