2022年3月31日政府宣布，地球将遭受巨大陨石的撞击。把自己关在家里的人，立即逃跑的人，完全不相信的人，大家的反应因人而异。对于1个月后迫近的陨石冲撞，他们会想着什么，过着怎样的日子呢？5个人各自渡过了自己人生最后的一天。在说再见之前，他们选择的最后的“想做的事情”是…

One day, people were informed that a meteorite is approaching the Earth, and it caused the world to fall into chaos. As research progressed the distance between the meteorite and the earth is slowly getting closer…

The story follows the perspective of 5 people as they spend their last 31 days on Earth. Those people are, a high school boy looking for an impulse, a high school girl who can’t express her feelings well, a teacher who tries to fulfill his promise to someone, a coffee shop owner who is pregnant, and a hikikomori boy who craves for the destruction of the earth. On the last day, before "goodbye", what is the last thing that they want to do?

隕石衝突による地球最後の31日間を、月曜から金曜まで曜日ごとに視点を入れ替え、計5人の主役がリレー形式で紡ぐ物語。