Provided are a beverage with effectively improved aroma, an additive composition, and a method relating to these. A beverage according to one embodiment of the present invention contains 4-methyl-4-sulfanylpentane-2-one (4MSP) and 3-sulfanyl-4-methylpentane-1-ol (3S4MP), wherein the 4MSP content is 10-120 ppt, inclusive, and the ratio (3S4MP/4MSP value) of the 3S4MP content to the 4MSP content is 2.5-26.0, inclusive.