1. An image forming apparatus comprising: a forming unit that forms a first image using a first toner including a flat pigment containing a first metal or a first metal oxide, and forms a second image using a second toner that does not include any flat pigment containing a second metal or a second metal oxide, a maximum length of the second toner being smaller than that of the first toner; and a transfer unit that transfers the second image and the first image to a medium in order of the second image and the first image.