March in a certain year, the morning after a heavy snowfall, Hirose Yuu (a 40-year-old divorced single office worker), who was on his way home after pulling an all-nighter, wound up getting hit by a car as he tumbled down on an icy downhill slope.
When he woke up, he found, to his surprise, that he had been reborn as a different person with the same name, on top of…