An ink set, comprising: an ink composition comprising a colorant and water; a pre-treatment liquid comprising an acid and water; and an overcoat liquid comprising water and particles of a resin, the resin comprising an acidic group selected from the group consisting of a sulfo group, a salt of a sulfo group, a phosphonic acid group, a salt of a phosphonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group, wherein the particles respectively comprise, in at least a part of a surface thereof, a surfactant comprising an acidic group selected from the group consisting of a sulfo group, a salt of a sulfo group, a phosphonic acid group, a salt of a phosphonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group, wherein a total content B of the acidic group selected from the group consisting of a sulfo group, a salt of a sulfo group, a phosphonic acid group, a salt of a phosphonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group, which is derived from the surfactant contained in the particles, is in a range of from 0.02 mmol to 0.30 mmol per 1 g of the resin, and wherein a ratio of a total content B of a sulfo group, a salt of a sulfo group, a phosphonic acid group, a salt of a phosphonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group, which are derived from the surfactant contained in the particles, per 1 g of the resin on a molar basis, to a total content A of a sulfo group, a salt of a sulfo group, a phosphonic acid group, a salt of a phosphonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group in the resin contained in the particles, per 1 g of the resin on a molar basis, is in a range of from 0.1 to 0.8. an ink composition comprising a colorant and water; a pre-treatment liquid comprising an acid and water; and an overcoat liquid comprising water and particles of a resin, the resin comprising an acidic group selected from the group consisting of a sulfo group, a salt of a sulfo group, a phosphonic acid group, a salt of a phosphonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group, wherein the particles respectively comprise, in at least a part of a surface thereof, a surfactant comprising an acidic group selected from the group consisting of a sulfo group, a salt of a sulfo group, a phosphonic acid group, a salt of a phosphonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group, wherein a total content B of the acidic group selected from the group consisting of a sulfo group, a salt of a sulfo group, a phosphonic acid group, a salt of a phosphonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group, which is derived from the surfactant contained in the particles, is in a range of from 0.02 mmol to 0.30 mmol per 1 g of the resin, and wherein a ratio of a total content B of a sulfo group, a salt of a sulfo group, a phosphonic acid group, a salt of a phosphonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group, which are derived from the surfactant contained in the particles, per 1 g of the resin on a molar basis, to a total content A of a sulfo group, a salt of a sulfo group, a phosphonic acid group, a salt of a phosphonic acid group, a phosphoric acid group, and a salt of a phosphoric acid group in the resin contained in the particles, per 1 g of the resin on a molar basis, is in a range of from 0.1 to 0.8.