Others have already provided plenty of reviews about how this is a visceral look at gay masculinity in a claustrophobic rural city. Three boys at a Catholic school - a nerd, a jock, and a punk - have different journeys toward dealing with their sexuality. (An older farm-boy features, too).
I'm mostly here to provide a couple content notes completely missing from most/all other reviews: there's a rape scene, and gross, unchallenged fatphobia.