The black history notebook of my middle school days was sent from my parents\' home.
While being nostalgic, as if I had made a proper magic circle, I summoned the Hero from another world.
\"–Who are you, an underling of the Demon King?\"
A story of struggling to return the hero who was summoned by mistake by a 25-year-old OL who should have completely cured her chuunibyou disease.



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