There is a scene where a little girl indicates that she has been abused. When given a chocolate, she asks whether she should remove her shirt or skirt. There are other scenes where little boys are stripped and observed. While most of the movie is mindless fun, there are a few serious scenes that mention how children are trafficked and thrust into prostitution etc.
A boy tells that if he gets late to home, his mom would remove his trousers and place heat on his bottoms. Only description nothing is shown.
In one scene, all boys were asked to remove their clothes. And the protaganist removes his shirts, pants and he is shown in his underwear for some seconds and then he is asked to remove his underwear. He intially refuses but removes it later. No nudity is shown when he removes it.