Under the belief that the omnipotent god Mitama will come to save him, Yukito Urabe participates in a ritual to become the new leader of his father's cult. But when the boy drowns during the ritual, he wishes to be reborn in a world without gods or religion. Reawakening in a completely different world devoid of spirituality. He meets a deviant girl named Aruaru, who introduces him to her village. However, his idyllic image of this world's society is short-lived when he witnesses a public group suicide and learns of the country's end-of-life system: at any moment, the government may order any citizen to die. Aruaru and her sister are forcibly taken for execution soon after, prompting Yukito to rush to their rescue—but to no avail. In a moment of desperation, Yukito recalls his father's teachings and utters a prayer for Mitama to save them. Seemingly answering his call, a little girl descends from the sky and annihilates everyone who harmed Yukito and his friends. To Yukito's surprise, the girl introduces herself as Mitama.

When, after her sudden death, Rinko Hanasaki is reborn as Raeliana McMillan, she is not sure whether to curse her luck. Raeliana was a minor character in a novel Rinko read, and as the eldest daughter of a nouveau-riche baron, she led a carefree life until her unfortunate demise at the hands of her fiancé, Lord Francis Brooks. To avoid her destined fate, Raeliana is determined to end her engagement with Francis. However, when Francis refuses to break things off, Raeliana decides to seek help from someone of higher standing and approaches Duke Noah Wynknight—the novel's male protagonist. Using her knowledge of the plot, Raeliana captures the duke's interest by proposing a deal: she will not expose his secrets if Noah agrees to act as her fiancé. Little does she know that getting involved with a duke who only shows his true colors around her may lead to more than she bargained for.

With a dignified veteran's body and a long white beard, summoner mage Dunbalf was one of the strongest player characters in the virtual reality online multiplayer roleplaying game Ark Earth Online, even heralded as a one-man army. Together with the Nine Wise Mages and King Solomon, they formed the mage player Kingdom of Alcait. But one day, Dunbalf and the other Nine Wise Mages suddenly go missing, leaving no trace behind. In an effort to spend his expiring credits, Dunbalf had purchased a cosmetic kit and tinkered with his character; however, he accidentally fell asleep during the customization process. Upon waking up, Dunbalf not only notices that the world of Ark Earth Online has become more realistic, but also discovers that he has turned into a cute girl! After reaching Alcait, he learns it has been 30 years since he supposedly disappeared. Now tasked with finding the other missing mages by King Solomon, the avid role player proclaims his new identity as Mira—the Pupil of the Wise Man Dunbalf—and ventures forth to prove his legacy.

In the kingdom of Earlshide, Merlin Wolford was once regarded as a national hero, hailed for both his power and achievements. Preferring a quiet life however, he secludes himself deep in the rural woods, dedicating his time to raising an orphan that he saved. This orphan is Shin, a normal salaryman in modern-day Japan who was reincarnated into Merlin's world while still retaining his past memories. As the years pass, Shin displays unparalleled talent in both magic casting and martial arts, much to Merlin's constant amazement. On his 15th birthday, however, it becomes apparent that Shin only developed his combat skills and nothing else, leaving him with blatant social awkwardness, a lack of common sense, and a middling sense of responsibility. As a result, Shin enrolls in the kingdom's Magic Academy to hone his skills and mature among other teenagers. However, living a normal life is impossible, as he is established as a local celebrity almost as soon as he arrives. As Shin Wolford adjusts to his high school life in the capital, he makes new friends, learns about the world, and fights off the various forces of evil surrounding him and his city.