In ancient times, after creating human beings in her own way, Gemini goddess created the source of filth based on women in order to allow human beings to live in a dangerous prehistoric world.The way men and women mating can make society more complex changes. Men are rough, barbaric, aggressive, and full of desire to conquer. But it is precisely because of these characteristics that humans can sleep in the time after the goddess creation to defeat the powerful monsters and stand firm in the heels of civilization. Men are always full of desire for mating, thinking about mating all the time, and also contribute to the continuation of civilization. It is for the prehistoric calendar. In the following period, the violent factors of men made the world chaotic, and the world's ethnic groups are constantly fighting each other. This era of melee is called the Chaos calendar. With the progress of history, civilization continues to flourish, and the genetic information reserved by the goddess makes menThe fertility rate gradually declines, and the progressive civilization also makes human beings no longer rude. In this period, the aesthetics of the entire civilized world began to yearn for slender and exquisite. During this period, men began to dress up like women, and even preferred gorgeous and exquisite women's clothing to be popular, and the worship of women began to become popular. In the end, men completely disappeared from history. Until now, only a few people will accidentally learn about their existence from history. This is the bright calendar to this day. In this era, social peace, unprecedented rich resources, advanced culture, and magic technology, civilization ushered in unprecedented prosperity.