The Some By Mi Yuja Niacin 30 Days Brightening Starter Kit is a 4-piece skincare set designed to brighten dull, uneven skin over a month of use. Powered by yuja (citron) extract and niacinamide, the routine includes a Brightening Toner to refresh dull tone, a Blemish Care Serum to target dark spots, a Moisturising Gel Cream for cool, calming care, and a Brightening Sleeping Mask for overnight radiance. Together the four steps help fade the look of dark spots and reveal clearer, more luminous, even-toned skin. It is a convenient trial- and travel-friendly set for anyone starting a brightening routine.