Somewhere in the city, the Junesu brothers spend most of the day fighting under the same house.
"I am sick of this fight, our family is over from today!" The next morning when they woke up, there was a sea of molten rocks outside the window.
"Kumama," a bear-shaped robot suddenly appears, announcing to the brothers an astounding truth-- that it was the end of the world and the government is planning to send all human beings back to the past. Selected as victims of the time travel, the brothers are sent on a time travel together with the whole house! From the Cretaceous period to ancient Eygpt, deep seas and Jomon period...What will happen to the fight between brothers over different time periods?!