This drama is adapted from the comic book of the same name. It tells the story of the designer and illustrator, Mirai, who has a secret that he cannot tell his beloved wife Hui - he suffers from a disease that will cause him to return to the past if his emotions fluctuate violently. And one day, he was suddenly told that his wife fell from the emergency stairs of the company and died. Why did his cheerful and innocent wife die? Was it suicide or an accident? In the process of returning to the past, he saw his wife's unknown side and interpersonal relationships. Can Mirai save Hui through a time travel that cannot be controlled by his own will?