Not just any big ass will do! The most important thing is the line from the narrow waist curving into the hips! The difference between waist and hip measurements must be at least 30cm! Without this difference, it's simply not an exceptional ass! Driven by this belief, a hardcore ass fetishist studio owner measures the WHR (waist-hip ratio) of the models gathering at his studio, then proceeds to shoot them in extreme, perverted scenes!