Do I Really Have to Save the Kingdom That Wanted Me Dead?

"You take my fiance, my money, and now you take me with you when you fall off the building... this is just the absolute worst!!" That's what I was thinking when all of a sudden I blinked, and found myself in a new life...! Liselotte is a young girl who was told she must be sacrificed for her kingdom as she is one of the few rare powerful magic wielders that are born only once every thousand years. She has been living out her days, sad and accepting of her fate, when suddenly the memories of her past life as a pharmacist named Toka Mikanagi come back to her. Before she has a chance to think too much about it, she realizes that the woman she knew as Queen Kirara is identical to the person responsible for her death in her past life...! Now she has to make use of her knowledge as a pharmacist to find a way out of an untimely death!

(Source: MangaPlaza)