Fish Boy

(from ebookjapan):
There was not a single child in the city where civilization had collapsed. Old faces peeked out from under rubble-turned-buildings. Time is passing, and people are ending their finite lives. The world is coming to an end... and then, suddenly, a life is born. For the first time in decades, a new life, a new successor. But what will be the fate of the only life left after the death of the old? (Fish Boy) / A collection of 11 other gems of short stories!