The world is thrown into chaos when the public learns that in just ten days’ time, a massive meteorite will hit the Earth, likely wiping out the entire human race. This horrific news has sent a young man working in a dead-end office job named Masumi Nishina into shock. But he soon makes peace with his destiny and decides to return to his college library, where he intends to read books in a tranquil setting while he waits for the end to come.

But this decision proves to be a major mistake – as it is here he is reunited with the man who ruthlessly broke his heart: Ritsu Kusakabe. But with the clock ticking and just days remaining until the world comes to an end, they start to wonder if they should perhaps reignite their romance...