The number “9” disappeared from every clock one day.
That was a day with 23 hours, but no one ever noticed.
In this world, 12 dimensions each control a number on the clock. Every dimension has a guardian called Clocker to control time. The fight between clockers has no end.
Hikari, an ordinary high school student in Tokyo, is suddenly caught up in a battle.
He is captured, and he knows the secret of “9 o’clock”.
He is going to protect this world and save the time, the number, that people have lost.