A rough idea
Setting: think medieval- not modern or 18th century
In a snowy region of the world, the women in these lands are dropping and the numbers are of a great difference. To keep their people fro dying they need to reproduce. So a group of men set out to find new blood. New women. Old, young, married or not does not matter... Some
Men want slaves, some want love. Either way these women must adapt to the snowy regions and way of their new life. Some women may be shared with several men, some set to one man.
The story is not just sex. It is also how these characters will grow and adapt or change.