Toner, color toner set, developer, process cartridge, and image forming method

A color toner set, comprising:

• a yellow toner comprising a yellow colorant;
• a magenta toner comprising a magenta colorant;
• a cyan toner comprising a cyan colorant;
• a black toner comprising a black colorant;
• and
• a transparent toner comprising no colorant,
• wherein each of the toners comprises a binder resin comprising a resin (a) comprising a polyhydroxycarboxylic acid skeleton formed from an optically-active monomer,
• wherein the polyhydroxycarboxylic acid skeleton has a weight average molecular weight of from 7,000 to 60,000,
• wherein the binder resin comprises the polyhydroxycarboxylic acid skeleton in an amount of from 59.7 to 90% by weight,
• wherein the resin (a) is amorphous, and
• wherein the polyhydroxycarboxylic acid skeleton has an optical purity X (%) of 80% or less, the optical purity X (%) is represented by the following formula:
• X(%)=|X(L-isomer)−X(D-isomer)|
• wherein X(L-isomer) and X(D-isomer) represent molar ratio (%) of L-isomer and D-isomer of the optically-active monomer, respectively.