Shogo Kai (Yuji Oda) is a lawyer at one of the big 4 law firms in Japan. He is good at his job, but he is arrogant. Shogo Kai only thinks about winning and he thinks the only way to satisfy his clients is to win. He is getting close to becoming a senior partner at the law firm. Shogo Kai's boss worries about his focus on winning above all else. As a condition of his promotion at the law firm, his boss asks him to hire a young lawyer as an associate. Shogo Kai interviews prospective young lawyers and meets Daiki Suzuki (Yuto Nakajima). Daiki Suzuki has high intelligence and his memory ability is amazing.
Takeshi Kasumi has spent his entire life devoted to his job. Now a retired man, he finds himself with plenty of extra time on his hands. While on an afternoon walk, Kasumi discovers the joys of day time drinking and the realization that he is now free to eat and drink what he wants, when he wants. This awakens his inner persona - a wandering samurai living life freely in Japan's age of civil wars. Thus begins his search for blissfully delectable delights to satisfy his stomach and the samurai's soul.