Me and my magician sister

Correct, really can only be judged according to the results?
The result is optimal, so is it really correct?
……
"The Strongest Magician of the Last Era"
This title belongs to my father. Because of the experiment of "conceptual magic", my father's magic power leaked and he became the sinner of the world. He disappeared in 1999, leaving me and my sister.
Ten years later, my sister and I both became third-rate magicians in the magic school and lived an ordinary life. What our father left us was what others would say to us: "sinners' children".
PS: Reading order: Book of Wind → Book of Forest → Book of Fire → Book of Mountain

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