The innermost part of the vagina where this beautiful woman shows an abnormal reaction, around the cervix. Aiming at that point, she repeatedly thrusts the piston over and over again, and the cervix that has been opened irresistibly at a climax that makes her gaze blur, and finishes it all at once with an outrageous ejaculation. At that time, she had an expression as if she had stopped being human, and she was no longer the Yui-san you knew.
