Sei Takanashi, an overworked twenty-something office worker, is unexpectedly summoned to another world, the magical kingdom of Slantania, during a late-night return home. Summoned alongside another young woman, Aira Misono, by a ritual meant to conjure a "Saint" to banish demonic monsters, Sei is immediately cast aside. The arrogant Prince Kyle ignores her, declaring Aira the true Saint due to her entrance spectacle. Left to her own devices in an unfamiliar realm, Sei feels little bitterness and instead embraces her newfound freedom, deciding to live a quiet life of scholarship and self-reliance.Seeking a productive purpose, Sei secures a position at the Royal Institute of Medicinal Flora, a facility dedicated to creating potions and studying herbs. Driven by her innate passion for efficiency and her meticulous nature, she begins brewing potions using her magical power. To her astonishment, every potion she crafts yields an
extraordinary ninety-percent efficacy boost—a phenomenon previously thought impossible. Unbeknownst to her, Sei is the actual Saint, her immense magical reserves far surpassing standard human limits. Her creations consistently save lives, cure terminal illnesses, and alter the kingdom's magical economy.Sei’s quiet anonymity is shattered when she uses her potent magic to save the life of Albert Hawke, the formidable Commander of the Third Knights Order, who has been gravely injured by a monster. Albert becomes instantly captivated by Sei’s kindness, humility, and staggering power, initiating a slow-burning romance that blossoms through shared tea dates and quiet companionship. As Albert falls deeply in love, he becomes fiercely protective of her, shielding her from the political machinations of the royal court.Meanwhile, Aira struggles under the intense pressure of being treated as a political tool by Prince Kyle, leading to isolation and anxiety. Sei acts as an empathetic mentor to Aira, helping her navigate her magical abilities and adjust to her new reality. Sei’s journey also leads her to master sacred magic, a lost art crucial for vanquishing the miasma threatening the kingdom. When a massive demonic outbreak threatens the capital, Sei steps onto the battlefield for
the first time. Unleashing a brilliant, holy manifestation of her power, she effortlessly obliterates the horde of monsters, officially revealing herself to the entire kingdom as the true Saint. Despite her monumental status, Sei remains grounded, choosing to prioritize her botanical research and her growing, tender relationship with Albert, ultimately finding true fulfillment, love, and a genuine home in a world that initially rejected her.