Lustomic - The Iron Corset - Western Adult Comic

Once there was a fair kingdom where the people were happy to be ruled over by the just and beautiful Queen Mary. But a dark shadow hung over this land. Queen Mary's daughter, Princess Tilly, was cruel and petty. Everyone feared the day she would become queen.
So Mary devised a plan to ensure the real Princess would never become Queen. There just happens to be the perfect body double available to take her place. The only problem is that person is a man! The Iron Corset and many months of intense sissy training turns him into the new Queen!