EArTh - Manga

People live and then they die, but what matters is how they lived. It first starts around 1932 "she" a girl with bunny ears and a tail; encounter an old man named Jain; they lived together for a short time but they found a little bit of happiness by being together.; Time may pass but "They" continue to live even to the current present day and beyond. But what are they the beings called "EaRth" ?