I got summoned in a world of only women

High schoolers Francis, Walker, and Gilbert are suddenly summoned into a mysterious new world. They quickly discover that this world is populated solely by women, as all the males were wiped out by a wave of monsters that released a toxic gas affecting only men. As summoned heroes, their mission is clear: defeat the monsters and help restore balance by impregnating as many women as possible to ensure the survival of the population. But when Francis meets the queen of this kingdom, he falls in love with her at first sight and she falls equally in love for him. Will he follow his duty to restore the natural order, or will he abandon it for the woman he loves?
And will the queen be selfish and take him all to herself, or will she let him do his duty? Read to find out which path Francis chooses.