The innermost part of the vagina where this beautiful girl 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 irresistibly dilated at such a climax that her eyes cant focus, and finishes it off with a ridiculous ejaculation at once. - At that time, she made an expression that should not be shown to others, and she was no longer the Tsubomi-chan you know.