There Should Be Rules (2015)

Mia and Mirjam are two 14-year-olds who live in a very dreary little town. Though not especially grown-up, they're both trying. Mirjam gets a head start by forming a relationship with an older man who says he loves her. Mia has a dad who drinks a little too much. Lucky for them that they have each other. Not forgetting Karl, their super-smart buddy.