Slim-waisted Nami Amuro takes on the Cowgirl Time Trial. She wins a prize if she can make a man cum while riding him within five minutes; if she fails, she faces a kinky penalty. Nami starts slowly and seems almost unmotivated, but once she switches on, her hips jump into top gear like a supercar. She pounds away in a furious cowgirl ride, trying to force his orgasm before time runs out—but will she succeed?