The story follows Cheremy, a former man reincarnated as a young noblewoman in a medieval, magic-filled world where magical ability dictates social standing. Cheremy, born a second-class magic user, is the daughter of Count Cardim. Her primary motivation is to avoid an arranged marriage to a man, as she identifies as male and desires a relationship with a woman. To escape this fate, she orchestrates a house fire, sustaining burns to her face and left side, which leads to the annulment of her engagement.
Cheremy then requests a separate estate from her parents, where she plans to live a quiet, independent life. She hires a small staff, including maids and guards, and begins to learn about the world and how to earn her own living. She befriends a traveling merchant named Maggot, from whom she learns about the common people and business. Cheremy reveals her talent for enchantment magic, specifically her ability to imbue objects with elemental magic. She creates fire-enchanted rings, which Maggot sells on her behalf. This venture proves successful, generating significant income and establishing Cheremy as a shrewd businesswoman.
Her business acumen expands as she develops more enchanted items, including "magic charging boxes" to replenish the rings' power, and later, more sophisticated items like enchanted wands and even a "popcorn maker" and "coffee maker" integrated into her furniture, showcasing her advanced knowledge from her past life. She also begins to invest in improving her estate, commissioning the construction of bathing facilities and a flush toilet system, a stark contrast to the era's primitive sanitation.
Cheremy's father, Count Cardim, becomes aware of her business success and requests more enchanted rings, leading to the arrival of skilled craftsmen and an art merchant from the capital. This introduces the concept of "gentlemen's gatherings" where the rings are a fashionable accessory for lighting cigars. Cheremy also learns that her business dealings are indirectly supported by a powerful figure, possibly a Duke, through the Manaletta trading company, which is linked to her father's family.
The narrative then shifts to Cheremy's personal desires beyond financial independence. She expresses a strong desire for a comfortable life, including modern amenities like baths and toilets, and a longing for romantic relationships with women. She also reveals her past life's regret for not pursuing culinary arts more seriously, leading her to hire a skilled chef and expand her estate's culinary offerings.
A significant turning point occurs when Cheremy's former maid, Azaiya, who was involved in the fire that scarred Cheremy, reappears. It is revealed that Azaiya was a former royal shadow operative, and her actions were orchestrated by a higher power connected to the royal court. This revelation introduces a potential threat and complicates Cheremy's desire for a peaceful life. To counter this, Cheremy is introduced to a powerful demon, a "loli-giant breasted" individual, whom she immediately decides to recruit as her personal attendant, hinting at a shift towards a more complex and potentially dangerous future.
