The name Tarou Sakamoto once instilled fear in every villain. No other professional hitman matched his prowess, and fellow assassins revered him. However, Sakamoto fell in love. In five short years, he married, became a father, put on some weight, and traded his weapons for an apron as he became the owner of a humble convenience store. Although Sakamoto is decidedly retired, he finds his old life of crime hard to shake off. His former partner, Shin Asakura, reappears and resolves to stay with Sakamoto's family under their strict no-kill rule. To make matters worse, a large bounty is placed on Sakamoto's head. Numerous assassins now pursue him—but they are in for a surprise. Sakamoto has not lost his edge, and no matter what tricks his enemies pull, he will fight off every last one to protect his dear family.

Despite occasional setbacks, Operation Strix has remained on track to extract sensitive information from the enigmatic politician Donovan Desmond. To this end, spy Loid Forger has managed to maintain his pretend family consisting of his telepathic daughter, Anya; assassin wife, Yor; and their clairvoyant dog, Bond. Still the only one aware of everyone's true identities, Anya tries to sustain the family's cohesion while working to befriend Donovan's son Damian, her Eden Academy classmate. However, Anya's efforts instead earn her another Tonitrus Bolt, bringing her closer to getting expelled and jeopardizing the operation's success. Hearing the news, Loid faints from shock. In his unconsciousness, he reminisces about his tragic past and his journey to becoming a spy. Realizing what Operation Strix means to him and the world, Loid finds renewed motivation. Although they each work toward their own covert goals, the Forgers continue to cherish their chaotic yet blissful family life.

The supermarket is an important building in any city, for they provide a convenient way to purchase a variety of food in a family-friendly, safe environment. However, these stores changes in the blink of an eye once the unsold bento boxes go on their nightly half-off sales! War breaks out and friends become foes as each person fights for honor, pride, and dinner. There are no longer any people in these supermarkets, only Wolves and Dogs⁠—winners and losers. High schooler You Satou is painfully introduced to these battles after unknowingly stumbling into the war zone, but instead of choosing to avoid these nightly fights, he wants to join in. After seeing Satou's lack of fighting skills, upperclassman and Wolf Sen Yarizui invites him and Hana Oshiroi, a girl who enjoys spectating the brawls, to join her Half-Priced Food Lovers Club to show them the distinction between the Dogs and the Wolves. Together, they learn what it truly means to fight for your food.

Gesicht, an android police detective of Europol, is tasked with finding the murderer of Montblanc, a retired war hero robot. Although it appears that only a robot could have committed this crime, the murder of a renowned robot rights activist casts doubts on the criminal's identity. Indeed, outside of an isolated and unexplained incident that occurred eight years ago, robots are programmed to be unable to kill human beings. However, the lack of human evidence on the crime scene and the similarity of modus operandi lead Gesicht to suspect that the two murderers might be the same being—be they man or robot. Shortly after Montblanc's passing, another retired elite war robot is mysteriously eliminated. Gesicht notices a pattern in the choice of murder victim: both dead robots belonged to a group of the seven most powerful war machines ever designed. Determined to stop the murderer from eliminating the five remaining veterans, Gesicht seeks help from Atom, a cutting-edge android who resembles a human boy. The duo must now hunt down the rogue killer before the series of murders is carried on, lest the very fabric of society suffer irremediable damage.