¡ÈUsotoki¡É is a Japanese word that refers to lying, and Kanoko, the lead in Usotoki Rhetoric, has a unique skill: she can tell when people speak lies. It's made her a freak and outsider where she lives, because, well, people who lie don't like being called out for it. Knowing that she's no longer wanted there, Kanoko journeys from her home, trying to find a new life and work elsewhere.

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https://otakuusamagazine.com/usotoki-rhetoric-is-a-delightful-and-charming-historical-manga/