The Saint's Magic Power is Omnipotent

Sei, a 20 year old office worker, is summoned to a different world after finishing some overtime work. But the person who had summoned her looks at her face and said, "This is not the Saint." Instead, the other summoned lady is lauded as the Saint, while Sei is ignored. Offended at being discarded without a second thought, Sei leaves the royal palace and looks for occupation, and she starts working at a laboratory where she makes potions and cosmetics. She uses her magic to grant people’s requests and slowly people begin suspecting that she is the actual Saint... Can Sei enjoy her slow dreamy different-world life without her saint title being found out?!