Few coming-of-age films have captured the messy, quicksilver emotions of puberty as well as this 61-minute video from Slovakia. A young woman suddenly marries, leaving the room she’s shared with her 12-year-old brother, and the boy, feeling betrayed, lists his grievances against her (“she laughs when I feel sad”) like a multicount indictment in the diary they’ve also shared. After they reconcile, their playful intimacy is renewed: the boy “sees” the baby she’s expecting by looking down her throat. The story is character driven, never subjugating the boy’s mood swings to plot contrivance; director Eva Borusovicova has an eye for the subtlest nuance and elicits an engaging portrayal from Jakub Kroner as the boy.