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The story of an unknown demon and a human girl. It is also interesting that human beings are full of possibilities because of their weakness.

A young man was reincarnated and went to a different world, only to find that he was not the protagonist. Because of some things, he became a mercenary and was asked to dress as a woman. Although he became an undercover knight again, why did he want to dress like a woman so much? It's getting weird!