The world’s population is on the verge of collapse. Because the birth rate is decreasing due to a terrible epidemic, it does not affect women but directly kills all the men in the world. Of course, there are still a few men who can escape the fate of being destroyed. When the epidemic passes, the consequences will spread everywhere. The population is aging, and the new generation has not yet been born. The risk of human extinction is very high. Fortunately, the player is one of the men who still survives. He returns to a village and becomes the last chance for that village to regain its vitality. You will have to do your best.