Riku, a track team member struggling with his performance, decides to receive coaching from a mysterious trainer. However, this coach is no ordinary man. Under the guise of teaching proper body mechanics, he relentlessly touches Riku's body—causing Riku's cock to become fully erect. The coach barks, "Getting hard during practice?! Run one lap around the field with that dick on full display!" and forces Riku to jog the entire track with his massive hard-on swinging wildly. When Riku's arousal refuses to subside, the coach escalates his assault. "I'll put out that fire—my way!" he shouts, pouncing on Riku. Despite Riku's resistance, the coach greedily sucks his thick cock, then forcefully shoves his own massive dick into Riku's mouth. He then flips Riku into wheelbarrow position, spreads him into a spread eagle, and pounds his ass with acrobatic, relentless thrusts. Finally, the coach erupts, blasting a massive load of cum straight into Riku's face—bringing the story to its shocking climax.