A world of reversed sexual morality

A man in his thirties who lacks a sense of purpose in life, has no friends or romantic partner, and has lost confidence in himself longs for a kind and benevolent world for himself, he suddenly realizes that the world has become just as he had wished. In this world, the male population has slightly decreased, leading to an increase in female sexual desire. It is a world where men are the gatekeepers and women are the pursuers. (Warning: Wish Fulfillment)