Body Conquest II ~The Messiah~ (1990)

Long ago, God has created Eve from Adam's rib ... but the ground of men and women has proved constantly unstable. Eventually, Man became cursed by the witch of Topaz. Ever since the curse of impotence, the man lost confidence, and the women fall to frustration. One day, A baby boy was born in the castle town of Castle Tatsunda. It was the birth from a virgin conception. On his 15th birthday, the boy is asked by the king to defeat the curse, and become a savior.