Yuji and Kaoru have the mental capacity of primary school children. Yet these two are spotted by an executive of the Hanatate-gumi and recruited into the gang. However, their boss Okita makes them clean the toilets, steals their pocket money, and to top it all off, they end up eating and drinking on the house. Female police officer Fusako clings to them, trying to turn them into decent human beings – it’s a far cry from the yakuza in the films. Just then, the Akai-gumi starts wreaking havoc on the Hanatachibana-gumi’s turf. Yuji is chosen as the gunner. But wait—Okita’s sold off all the guns and knives! The industry’s first bare-handed gunner!? That’s ridiculous!!