Provided are a beverage having an effectively improved aroma, an additive composition, and methods for those. A beverage according to one embodiment of the present invention includes: 4-methyl-4-sulfanylpentan-2-one (4MSP); and 3-sulfanyl-4-methylpentan-1-ol (3S4MP), in which a content of the 4MSP is 10 ppt or more and 120 ppt or less, and in which a ratio of a content of the 3S4MP to the content of the 4MSP (3S4MP/4MSP value) is 2.5 or more and 26.0 or less.