Tits

Sam is a 13-year-old boy. He goes to a school for boys where the corridors seem to exude centuries-old testosterone. In that world of small uniformed men, Sam grows a pair of tits. His desperate attempts to hide the monstrosity in his body fail when he is forced to take swimming lessons. The belts, the t-shirts and the shirts with which Sam kept his secret will no longer be of any use. Blythe, the class bully, has discovered why the new kid is so reserved. Blythe and Sam test each other, fear each other, each of them is, to the other, a glance of what they'll become and, in that suspicion, they find themselves being accomplices to their own insecurities. - IMDb