Kinou Yumeto lives a hollow existence. He went to a mediocre university, got a job at a mediocre company, and realizes that there’s something missing in his mediocre life.

Then one day he crosses paths with a demon named “Laplace” when everything disappears and he suddenly finds himself 13 years in the past. Before him are familiar friends, a familiar school and a familiar life.

“If I can rewrite the world, perhaps I can change my life as well…?”

Yumeto spends his days enjoying these nostalgic and fun times. But there’s also a girl intertwined with his memories that he does not remember…