The Alchemist Who Survived Now Dreams of a Quiet City Life, Vol. 1 (Manga): Ring, Ring Magic Potion - Usata Nonohara

For an alchemist like Mariela, performing incredible feats of magic are just part of the job. So when a stampeding hoard of monsters threatens to devour the kingdom of Endalsia, she decides to put herself in a brief state of suspended animation to survive. Luckily, she awakens safe and sound--200 years in the future... Now, all Mariela really wants is a quiet, laid-back life in this land she barely recognizes. It's too bad potions have become a luxury good, and she's the only girl in town with the skills to make them. \nWhen a stampeding horde of monsters threatened to destroy the world, Mariela the Alchemist would go on to survive. At the advice of her master, she placed herself in a state of suspended animation and awoke unaged and unharmed--two hundred years in the future! Alchemy is now a lost art, and potions have become scarce. As the last remaining alchemist, Mariela just wants a quiet life. But while she and her newfound allies work to carve out a slice of home for themselves in the Kingdom of Endalsia, keeping a low profile is harder than she thought.