An object of the present disclosure is to reduce the number of pages while guaranteeing the consistency of the story of an album. One embodiment of the present invention is a non-transitory computer readable storage medium storing a program for causing a computer to function as: a selection unit configured to select, based on analysis results of each of a plurality of model images used in a model album and analysis results of each image in a candidate image group that is used in an album, similar images similar to the model images from among the candidate image group; a creation unit configured to create a layout in which the similar images selected by the selection unit are arranged in templates of the model album; and a reducing unit configured to reduce a number of pages of the layout.