Tumbling Birds (2013)

She doesn't know it yet, but this year's sweltering summer will mark the end of Svenja's childhood. The butt of endless jokes at her school, Svenja finds solace under the wing of a fellow outcast - the school's janitor and his impressive collection of pigeons. Despite this burgeoning new friendship and unlikely hobby, temptation draws her to the dazzling and mischievous popular girl Janine, who takes an interest in the naive Svenja.

Unfortunately the movie Tumbling Birds is not yet available on HBO Max.