After the death of his grandfather, 19-year-old Kazuya Souma—an aspiring civil servant—is left all alone with no one to call family. Out of the blue, he is transported to the Elfrieden Kingdom, a small ailing country in another world, to be a hero. An ongoing war with the demon army has put the entire world in peril, and Kazuya was summoned to aid in the conflict as an offering from Elfrieden to its allies. Dissatisfied with being used as tribute, Kazuya decides to help the kingdom revamp its declining economy—not by way of adventuring or war, but through administrative reform. Abruptly declared the King of Elfrieden and betrothed to the princess, the Realist Hero Kazuya sets out to assemble a group of talented citizens who will assist him in his bureaucratic battles to get the kingdom back on its feet.

All his life, Yuuya Tenjou has been the subject of resentment and contempt from everyone around him, even from his parents. To make matters worse, his grandfather—the only person who ever showed him affection—suddenly dies, leaving Yuuya truly alone. Despite facing many adversities, Yuuya does what he can to offer kindness to those who need it—but even the most good-natured people can only tolerate so much abuse. Just when he reaches his breaking point, a flicker of hope appears in the form of a hidden door in his bathroom. This door provides two-way access to an abandoned house in another world, where he instantly gains game-like stats and skills. Moreover, the house once belonged to a sage, which gives Yuuya access to remarkable weapons, equipment, and crops with extraordinary effects. With these newfound blessings, the once-undesirable Yuuya may just reach his true potential and become unstoppable.

Due to his love for small, cute things, Souta Takanashi cannot turn childlike Popura Taneshima down when she recruits him to work for Wagnaria, a family restaurant located in Hokkaido. Takanashi takes particular joy in doting on the older Popura, which only fuels her complex over how young she looks. He also quickly learns he must stay on his toes once he meets the rest of his colleagues, including the katana-wielding floor chief Yachiyo Todoroki, the intimidating head chef Jun Satou, the dangerously well-informed and subtly sadistic sous chef Hiroomi Souma, the adamantly lazy manager Kyouko Shirafuji, and the waitress Mahiru Inami who has a painful fear of men. Powered by an eccentric cast, Working!! is a unique workplace comedy that follows the never-dull happenings within the walls of Wagnaria as Takanashi and his co-workers' quirky personalities combine to create non-stop antics, shenanigans, and hilarity.

Shirayuki and Zen Wistalia have finally confirmed their romantic feelings for each other, and everyone has resumed their daily lives. Shirayuki remains an apprentice court herbalist at the royal palace of Clarines, and Zen continues his duties alongside his aides. However, their daily routines are disrupted when Crown Prince Izana, Zen’s older brother, receives an invitation from Raji Shenazard, the prince of Tanbarun. The herbalist finds herself ordered to go to Tanbarun for seven days, to build a new friendship with the formerly selfish and haughty ruler who once ordered Shirayuki to become his concubine. Along the way, Shirayuki is bound to run into trouble once again, as she is sought by a mysterious boy named Kazuki, someone she has never met.