 If you liked
Honzuki no Gekokujou: Shisho ni Naru Tame ni wa Shudan wo Erandeiraremasen
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 ...then you might like
Silent Witch: Chinmoku no Majo no Kakushigoto
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Both series has a quiet, reserved girl from a small, poor village who is extremely smart and are a highly skilled magic user. They loves books and learning, and while people tend to underestimate them, their not someone to be taken lightly. Both are also fantasy type of world building.