The Will of Heaven

Prince Hiram of Pradeira is deemed unfit to be king after his father dies. But as a direct descendant of the gods, only those of his bloodline can reign. To avoid civil war, he agrees to have a child with each of the princes of the other noble houses of the kingdom so that his firstborn and heir can inherit the throne from whoever fathered him. 
Rest assured, this is not a romance.
•The prince of a kingdom brought low.
•Multiple men fucking said prince (as part of a political solution he negotiated).
•Feminization, impregnation.
•Uncomfortable medical examinations.
•Public sex.
•Humiliation and body dysphoria.