The school teacher takes his students on an outing to a public swimming pool. All the boys in the class (about a dozen, ages roughly 10 to 12) are seen naked in the shower. Full frontal and rear nudity of most boys.
In a pre-title sequence many boys aged 12-15 shower. Some of these boys wait with bowls of water as 3 younger boys enter via a door and throw the water over them . Many boys are dressing supervised by an elderly woman.