3-second video of deep and heavy rhythmic pelvic thrusting. 1. [Expression Anchor]: Maintain Riko's ecstatic expression and wide open mouth with absolute consistency throughout the entire motion, ensuring no facial deformation. 2. [State Lock]: Keep the facial features fixed in the same overwhelmed state as the reference image, with eyes and mouth frozen in pleasure regardless of the body's movement. Maintain the same character appearance, pose, and over-the-shoulder POV as the previous image. Maintain the user's hands gripping Riko's thighs. Focus on the physical impact and the trembling of Riko's body with each thrust.