The story begins with Komaba Rintoku, a 35-year-old "bachelor aristocrat" in modern Japan, who meticulously cultivates a solitary, comfortable life, deliberately avoiding marriage and family. He savors gourmet meals and home entertainment, valuing personal freedom above all. His life is abruptly cut short by a sudden, solitary death from chest pain, a risk he had consciously accepted.
Rintoku awakens in a pure white void, encountering the kind-faced Earth God and the quiet Solitary God (Hitorigami). Despite his lonely demise, Rintoku expresses no regret, reaffirming his unwavering commitment to solitude. Impressed by this resolve, Hitorigami, deity of a fantasy world, offers Rintoku reincarnation with retained memories and boons. Rintoku accepts, requesting aptitude in magic tool creation to recreate modern conveniences, a healthy body to negate health risks, and basic combat skills for self-defense, all to ensure a comfortable, independent life.
Reborn as Zilk Rulen, son of a noble magic tool craftsman family, he quickly adapts. By age eight, Zilk leverages his past knowledge and new aptitude to design a "refrigerator," astonishing his parents, Lesta and Mira, and bringing prosperity to the Rulen household. However, his younger siblings, Ilia and Alto, constantly demand his time, reinforcing his desire for an independent life.
Twenty years later, Zilk, now 28 and unmarried, has established his own successful magic tool workshop in the Royal Capital, a bustling city inhabited by various races. He invents conveniences like magic stoves and dryers, prioritizing personal comfort. His employees, Tristan, who yearns for marriage, and Rouge, a married woman, frequently clash with Zilk over his staunch anti-marriage stance and refusal to expand, highlighting his deep-seated preference for minimal human interaction.
On a day off, Zilk, after declining a social dinner, indulges in a solo yakiniku meal at "Nikubisi," a restaurant he helped transform into a success. He savors the freedom of eating alone, reaffirming his belief that solitary dining is superior. Later, during a solitary outing to his favorite lake in the East Forest, he encounters Eight, a curious stranger. Zilk reluctantly shares his self-made smoked delicacies, receiving rare, expensive wine in return. This interaction, while pleasant, ultimately reinforces Zilk's preference for his own company, as he concludes his day fishing alone, content in his chosen lifestyle.
The narrative arc sees Zilk transition from a solitary life in modern Japan to an equally solitary, yet influential, life in a fantasy world. His death and reincarnation serve not as a catalyst for change in his core philosophy, but as an opportunity to reinforce and perfect his ideal of independent living, using his unique skills to shape his environment to his exact specifications, always prioritizing personal comfort and freedom.
