1. An image-capturing apparatus comprising: a capturing unit comprising circuitry configured to capture an image; a superimposition unit configured to superimpose an object into target images captured by the capturing unit; a reception unit configured to receive a request to acquire information regarding a number of settable objects; and a transmission unit configured to transmit at least one of maximum numbers of settable objects which are to be superimposed into target images based on the request received by the reception unit, wherein the maximum numbers of settable objects correspond to respective types of the target images, wherein the superimposition unit, the reception unit, and the transmission unit are each implemented by at least one processor.