When reservations are made together for a plurality of events of different genres, the present invention correctly manages a group of reservations that includes reservations for the plurality of events. In order to collect and present to a user, as reservable events, a plurality of events that correspond to each of a plurality of genres, said genres being for categorizing events for which reservations are made, to then receive reservations for the presented plurality of events, and to manage the received reservations for the plurality of events, a reservation processing module 221 issues at least one of the following: one first identification ID that collectively identifies reservations for a plurality of events as one reservation, a plurality of second identification IDs that individually identify a reservation for each of a plurality of events, and a plurality of third identification IDs that identify, for each prescribed reservation reception unit, reservations for a plurality of events.
