S-rank supreme beauty Hyakuta Emiri stars in "Cowgirl Position Time Trial!", a challenge-themed release focused entirely on the cowgirl position. Emiri excels in cowgirl, boasting a wide variety of techniques. The rules are simple: if the man cums within five minutes while she rides him, he wins prize money. But if he fails to climax in time, he faces a punishment game with the risk of "itchy discomfort," forcing him to endure and stay focused. Emiri teases him with comments like "I can definitely make you cum within five minutes..." and "Are you a slow ejaculator?" gradually driving him wild with arousal. Lying down beside him, she says, "Excuse me," then gently stimulates his nipples before moving into handjob and blowjob, blending eroticism with tenderness. After penetration, even if she forgets to start the timer, it's forgiven as part of her service. She cycles through various cowgirl styles—bouncing up and down, arching her back, grinding—relentlessly riding him while provocatively asking, "Which one do you like?" or "Can you feel your cock rubbing?" She transitions into reverse cowgirl while keeping him fully inside, continuing to ride hard even after time runs out. Overwhelmed by her intense riding, the man eventually loses control and cums, unable to hold back any longer. The video closes with Emiri declaring, "I'm so frustrated!"—a passionate finale to a must-watch showcase of Emiri's erotic mastery and relentless energy in the cowgirl position.