The Saint’s Magic Power Is Omnipotent Vol. 1 (Light Novel)

Sei Takanashi is a workaholic in her 20s who returns home one night after a long day of overtime and is suddenly enveloped in light and transported to another world as a “Saint.” Unfortunately, the ritual that was supposed to only summon a single Saint ends up summoning two, and everyone seems to be enamored with the other girl who was summoned and completely ignores her. Finding herself stuck in an unfamiliar world, she decides to leave the royal capital and begins working at a medicinal plant research lab using her magic powers to create powerful healing potions. So powerful, in fact, they are 50% more effective! But when one of her potions is used to save the life of a dying knight commander named Albert, rumors begin to spread that she may, in fact, be the real Saint.
Notice: This book is written in Japanese.