Kochira, Haha Naru Hoshi Yori

A virus said to have come from space caused unprecedented damage to Earth. It has been a long time since that catastrophe, and now there are only six of us in Ikebukuro. The city has been reduced in size and its buildings have been torn down and decorated with green grass and blue water. The scent of an air conditioner comes from somewhere ... "This is Mother Earth!" And we are doing well today!...