This article has an imaginary background and can be understood as a parallel world. Many things are made up by the author = no need to seriously substitute them.
Roughly speaking, this is an everyday story where the heroine and the hero think each other is innocent (but they are not) and pitiful (but they are not) and need to be protected, and they have a few friends to fight monsters together.
Finally, I wish everyone a happy reading^_^
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