You'll be forgiven for groaning through the first 20 minutes of Rob Reiner's Flipped, which kicks off in a key of aggressively picturesque whiteness — I mean, wholesomeness. Adapted by Reiner and Andrew Scheinman from a novel by Wendelin Van Draanen and set in a late-'50s America rooted more in that era's sitcoms than reality, the film's coming-of-age love story follows its hero and heroine from second grade to junior high. Juli (Madeline Carroll, excellent) loves Bryce (Callan McAuliffe, also excellent) from the moment his family moves in across the street. Bryce, terrified of Juli's forthrightness, masks his terror behind asshole behavior that worsens with puberty — until those pangs of true love hit him. Narrated by both young characters, Flipped alternates POV to show how each interprets the same situations. The film settles into its hard-sell charm when it and Bryce segue from being dishearteningly dismissive of Juli as a stalker turned crazed eco-activist (foreshadowing '60s political upheaval) to celebrating her intrinsically principled decency. Bryce, meanwhile, struggles to shed an ideal of middle-class macho defined by his jerk father and reinforced by his best friend. Reiner, in very broad strokes, works in issues of poverty, thwarted dreams, and family obligation and almost pulls it off, thanks to Anthony Edwards, Aidan Quinn, Rebecca De Mornay, Penelope Ann Miller, and John Mahoney, who impart humor and humanity to thinly sketched characters.