The development of horse arousal drugs originally aimed to enhance mating comfort in female horses. In this daring project, popular big-ass queen Yuki Jin is administered the same substance. First tested on an assistant director to confirm it's non-lethal, the drug is then given to her. The effects push both individuals into extreme arousal, causing abnormal metabolic reactions. Driven by primal instincts, they devour each other like animals. As Yuki's ass becomes increasingly soaked with arousal fluids, she's delivered straight to a fan's home—unfolding a shocking climax.