Humanity was nearly wiped out. Eventually, the master of the house where the girl served also passed away.

In the aftermath, the girl found the cat her master had kept.

In this desolate world, with her master now gone, the girl questioned whether she should bother caring for this demanding and selfish creature. However, she thought that if her master were still alive, he would surely be furious if she abandoned the cat. So, she extended her hand to it.