The Midori Sour is an unabashedly sweet and fruity drink, and it gets most of its flavor from Midori, a Japanese brand of emerald-green, melon-flavored liqueur. The Midori is stirred over ice, mixed with a pre-made sour mix of corn syrup and citric acid, and then finished off with a citrus wedge, maraschino cherry, and maybe a splash of soda.