1. A computer system that retrieves, from at least one piece of moving image data, at least one scene that includes moving image content to be retrieved, the computer system comprising: a storage unit that stores a locus of a model of the moving image content to be retrieved and velocity variation of the model; a first calculation unit that calculates a first vector regarding the model, the first vector including the locus of the model and the velocity variation of the model; a second calculation unit that calculates a second vector regarding the moving image content to be retrieved included in the at least one piece of moving image data, the second vector being calculated on the basis of information on a motion of the moving image content; a third calculation unit that calculates a degree of similarity between the first and second vectors by comparing the first and second vectors; and a selection unit that selects, from the at least one piece of moving image data, the at least one scene, which includes the moving image content to be retrieved, on the basis of the degree of similarity.