A new and distinct cultivar of Azalea plant named `YBAZ-2028 Cotton Candy`, characterized by its dark green-colored leaves that do not abscise during the cooling and forcing periods; uniform and outwardly spreading plant habit; freely branching habit; uniform and freely flowering habit; relatively rapid flowering response; large red purple-colored flowers; semi-double hose-in-hose flower form; and excellent postproduction longevity with plants maintaining good flower substance for about five weeks in an interior environment.