Virgin Knight who is the Frontier Lord in the Gender Switched World

Story:

Faust was brought up by his mother as a unique male knight after being reborn into a world where women rule and men's morality and chastity are inverted. He quickly rises to the status of war hero and has a long list of accomplishments, but because he carried over his previous way of thinking, he experiences constant pain in his groin when confronted with people like a scantily dressed Queen who might as well be in the nude or the sexual harassment of the well-endowed Duchess he considers a friend, among others.