An overcoating liquid contains a hydrodispersible polyurethane; a compound represented by Chemical formula 1: C6F13—CH2CH2O(CH2CH2O)nH, where n represents an integer of from 1 to 40; a compound represented by Chemical formula 2: HOR1R3C—(CH2)n—CR2R4OH, where R1 and R2 each, independently represent alkyl groups having three to six carbon atoms, R3 and R4 each, independently represent methyl groups or ethyl groups, and n represents an integer of from 1 to 6; and water, wherein the overcoating liquid is applied to the surface of a recording medium onto which inkjet ink is already discharged.