From Wikipedia, Mister THA LAZY RAIN:

Young Seth Dove becomes obsessed with the idea of vampires and soon attaches his fixation onto a woman named Dolphin Blue. After his father’s suicide, Seth’s brother comes home from WWII and begins an affair with Dolphin, leaving Seth to become completely infatuated with the notion of his brother’s danger. Along with this, Seth finds himself at the mercy of an unstable mother along with a group of men, who plague the small children of Seth’s continually shrinking small town.

Also:

The film places the majority of its action outdoors around the dilapidated farms and in the cornfields of Idaho shot in idyllic sunlight which belies the dark secrets of the characters and plot. The story is told in an objective, somewhat absurdist style, which recalls David Lynch by way of Days of Heaven.

(There's an awesome bit with an exploding toad)