A system includes a member terminal configured to operate by a processor; and a server configured to operate by a processor, and to make public, on a network, original image data uploaded from the member terminal or tone-changed image data obtained by changing a tone of the original image data such that the image data can be browsed by a plurality of members, wherein the server is configured to: create the tone-changed image data by changing a tone of the original image data to a tone of a type selected by one of the members from a plurality of types of tones: and group a member who has uploaded the original image data and the member who has created the tone-changed image data, wherein the member terminal is configured to: wirelessly exchange data with a wrist terminal which is wearable on an arm and includes a display; and make a notification if the wrist terminal of the member grouped with the member who has uploaded the original image data comes within a predetermined range.