The Yuja Sour is a tangy and refreshing cocktail that features yuja, a citrus fruit native to Korea. This cocktail combines yuja juice, soju, lemon juice, and a touch of simple syrup. It is often garnished with a slice of yuja or lemon for an extra burst of citrus flavor. The Yuja Sour is a popular choice for those seeking a zesty and invigorating drink option in Seoul's bustling nightlife scene.