@Fuko
Not an isekai.
@Bramia
The post apocalyptic tag is a lie unless you count "an entire city with all of its 'population' and 'technology' destroyed and then rebuilt several hundred years in the future" as post apocalyptic.
Basically, this is an Atelier Series game except that the "Atelier society" went extinct while standard loli MC got sent to a no alchemy future. I completely forgot what the alchemy system was like but as for the guy who said the MC has terrible negotiating skills, not quite true. Imagine playing RO, a standard Red Potion costs 50z. Now, a standard Red Potion cost 500,000z. I dont think blaming the MC for haggling down her own selling price is wrong in this case.
Anyway, this is Slice of Life and is closer to the Atelier series compared to Tate Yuusha or something similar in levels of seriousness. Can be a good story is you want something non-action and light. Turn away if you are expecting God Eater.
P.S Someone should remove the post apocalyptic tag.