During 20XX an epidemic that became a world emergency in just days— took the world by storm. This disease targets the Y-chromosomes of humans which the males have. Women started to bring forth female children and no male has been produced ever since. From there one by one the males started to decrease and the leaders from all over the world came to a conclusion that males should start donating their for preservation and research purposes. The world government built a bank that is made to keep more than enough, until the world can find cure about that virus whom wiped out the Y-chromosomes.