ウイルスによりほとんどの男性が死滅し、世界は男性1人につき女性1万人の超ハーレムとなった。With most of the men killed by a virus, the world has become a super harem of 10,000 women for every man. The surviving men have lost their sexual desire and the world has entered a period of great stagnation. An erotic suspense swirled by lust in a near-future!