Purple Pup Rex and Ffun Pup debut their new mat room with a boxing practice session. What starts as friendly sparring quickly turns intense—Ffun Pup counters Rex’s punches with unexpected aggression, forcing Rex to fight back with dominance. But exhaustion and slips on the mat change everything. In one fall, Rex’s boxing shorts come off, leaving him in nothing but his jockstrap. Exposed and vulnerable, his famous ass becomes the center of attention as Ffun Pup presses the advantage. A raw mix of boxing, rivalry, and jockstrap erotic appeal.