Yuri, my lewd lower body, who gets fully erection even though she can't move

She is tied up, tied up, and without being able to move as she wishes, she uses a hole on its own...but Yuri's masochistic, lewd lower body gets more and more erections. That's right, humans whose movements are restricted, pursue only pleasure as they instinct! Please enjoy the instinctive, lewd boy Yuri, who has become a huge pervert.