A content server manages contents used in one or more events. The server includes one or more memories that store, for each one of one or more participants of an event, one or more capture images, each capture image being an image of particular content of a plurality of contents used in the event and having been captured to a personal terminal of the participant during the event in response to an operation to capture the image of the particular content to the personal terminal. The server further includes circuitry configured to transmit distinction information distinguishing each capture image to a particular information processing terminal.