Were humans born to perish? The main character, Nagisa Sugiura, is an ordinary high school girl you can find anywhere. The Sugiura family is a normal family that can be found anywhere. However, the world around them was definitely going crazy. Ever since a mysterious tree grew in Cape Town, the birthplace of humanity, in 2011... Mysterious trees suddenly begin to grow all over the world...Humanity is forced to think of the end of the world...People who indulge in momentary pleasures...People who give up everything and choose a carefree way of life... In a world where everything is rapidly changing, the story of a family who chooses to remain the same and defies despair begins!! In the real world, where it has become difficult to understand what "the right thing to do" is, and in a modern society where young people are losing their purpose in life, how will they use the life that is now in their hands?