The year was 2011. The War of the Irisu was at its height. One one side, Irisu Kiyoka, with her entire clan at her back. On the other, Irisu Makina, the leader of a small rebellion. At her side was her most trusted general; a man whose name was lost to the ages. The records only describe him as "Papa".

The war had no end in sight. There were many assassination attempts, and even more casualties. The one day, it all changed. News broke out that the leader of the Irisu Clan, Kiyoka, had been killed in her own office. Lying dead on the floor of the same room was a man believed to be the killer, but no one could say for sure. There was no trace of blood or gunpowder on him. The real killer is still believed to have escaped.

With the death of their head, the Irisu Clan was on the brink of defeat. The war stretched out for a few more months. Remnants of the clan still made attempts on Irisu Makina's life. None of them succeeded, and soon the fighting came to an end. The rebellion had won. In the coming years, word had spread that Irisu Makina had taken on this general, "Papa", as her concubine. Reports vary, but there is one thing for certain: this act of post-war procreation gave rise to a breed of ungrowing children, appropriately dubbed "Papa-babies". Having never seen a phenomenon like this, scientists across Japan were bewildered to the cause. A common theory, yet one not backed by any firm evidence, was that this "Papa" had his biological make-up altered with so many types of drugs that any children born from his seed would not be entirely... human.

Regardless of the cause, this new breed existed, and their numbers were growing by the day. By the end of 2020, normal humans were no longer being born. What was left of us were being overrun. Some were killed by this unholy species. Some were killed in the crossfire by their own kind. Many more ended their own lives in fear of what would come. Among the casualties over the years were the parents of this breed themselves.

It is now 2028. I believe I may be the last remaining human in the immediate area. I have taken shelter in the remains of an old school building. And it is with a heavy heart that I write these last words. The "Papa-babies" are swarming the streets. Even with the death of their matron, they continue to inexplicably multiply at an increasing rate. Tonight, I plan to break through their lines, eliminating as many as I can in an effort to find other survivors, or die trying.

Wait for me... Yuu-kun.