Nagase Kaoru, a 22-year-old office lady, suddenly finds herself reincarnated in another world. To help her survive in this new world, a being that amounts to its god gives Kaoru a younger body and... the ability to make insanely overpowered potions?! The reincarnated Kaoru must use her knowledge and cheatery to survive! 
 
(Source: Crunchyroll)

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One day, the supervisor in charge of watching over Earth was taking care of a distortion, when they made a mistake that caused Kaoru Nagase to lose her physical body. Not only that, but reincarnating her into a different, less culturally-advanced world is the only thing they can offer to do for her. Not one to take this turn of events sitting down, Kaoru makes a demand: the power to create potions at any time she pleases, with whatever effect she wants it to have—and it doesn’t stop there either. She asks for a magical Item Box, the ability to understand and speak every language, and the same body she had back when she was a fifteen-year-old girl. Using her newfound powers, Kaoru has to try and make a stable life for herself in a whole new world!
 
(Source: J-Novel Club) 
 
Note: Includes 2 extra chapters.

Carlos