The Saint's Magic Power is Omnipotent

Sei, a 20-year-old office worker, is unexpectedly transported to a new world. While meant to produce a single "Saint" to banish dark magic, the ritual inadvertently brings two individuals, with the second girl being favored by everyone. Sei, however, is content with her new life, using her magical abilities to run a successful potion and cosmetics business in the royal palace's outskirts. As her operation flourishes, Sei must navigate the consequences of her unintended Sainthood.