A world where a pandemic caused by an unknown virus in 1910 killed all the men in the world. In 2023, Japan’s population ratio is two men to eight women – in a world where men are in the overwhelming minority, men are super passive and have a hard time with women. Moreover, it was not only humans who died as a result of the pandemic. Other races who had been living in secret, hiding from humans, also lost their men, and the very survival of their species was threatened, which led to a interspecies exchange. Yuma Kito, who lived in this world, had his values completely changed the day he had a dream. With his aversion to women gone, he befriends a variety of women. This is a story of f*cking and procreating with women of various races who are hungry for men.