On August 12, the scorching Zuojing district of Kyoto. The only air conditioner in Xiayu Water Village is not on. Bad friend Ozu flooded the remote control last night. Just as I was discussing countermeasures with the ruthless beauty Akashi of the film club, a wooden-looking male student Takamura, who had never met before. It is said that he came from the future 25 years later in a time machine. Just then, "I" suddenly had a flash of inspiration. Use this time machine to go back to yesterday and pick up the remote control before it broke down. However, Ozu, they are free to change yesterday and rewrite the past. "I", who had a premonition of the crisis of destruction of the world, hurriedly intervened to stop it, but it was too late! Finally, can the remote control and daily life come back safely? And, where is the relationship between "me" and Akishi? Between "yesterday" and "Today", the story of the world's muddled use of time machines begins!