Handsome Master Derek is in a changing room and is being observed by creepy sub colin.
When the sub thinks the Master has left he grabs his jockstap and deeply sniffs it. Derek catches the perv doing this and decides to teach him a lesson by ramming the jock into sub’s face before thrashing him and pissing in his mouth.
By the end of this revenge mistreatment, the sub is a cowering, defeated mess.