Toni (14) strips to his boxers and swims across the lake to fight with two boys (14) who are stealing his gold spot. His boxers are whitie and you can see his front and rear through them especially when they're wet. It also looks like they fall down a bit when he's running out of the water but you can't see anything.
After he got his clothes wet Riki is forced to wear a dress at first he's not happy but later he is waking in the wood and meets a woman who talks to him. Then he's happy and starts to dance (the dress is see through and lift up, when he's jumping he has no underwear on).