With the events of Borot Dai behind Boss Borot, he suddenly breaks down from the gas build up in his body. To help him, Asimov-kun rebuilds him as Borottono giving him a samurai-like personality that lessened his earlier naughty personality with help from a slap function installed by Asimov-kun. The manga follows the misadventures of the newly built Borottono as he goes around with his friends in several misadventures.