In 12th century Japan during the age of the samurai, a unique master-servant comedy unfolds featuring the legendary warrior monk Benkei. Unlike the stoic and loyal retainer of historical epics, this Benkei is defined by a singular, overpowering obsession: weapons, which he considers the manliest of all hobbies. His life is turned upside down when he encounters Yoshitsune, a young man who is not merely a skilled fighter but is described as the most powerful living weapon in existence.

The narrative combines traditional comic storytelling with the short, punchy format of four-panel yonkoma manga. The central conflict and comedy arise from this perverse relationship, where the servant is a weapon fanatic and the master is literally the ultimate armament. The story follows Benkei as he navigates his intense enthusiasm for arms while serving under Yoshitsune, whose very existence challenges his understanding of what a weapon can be. The manga explores their bizarre bond through a series of gag-driven shorts, often highlighting Benkei’s fanatical hobby clashing with the realities of their era and his master's powerful nature.