A present giving system gives a present corresponding to a category within an estimated cost on an occasion for presents and allows a present receiver to accept or reject the present selected by a present sender. A server conducting the electronic commercial transaction requests input of information of a date, information uniquely specifying a second client device, and selection items associated with the date information from a first client device, and reminds the first client device of an the date and details of the selection items associated with the date information at a proper date and time before the input date. Then, the server device notifies the second client device of the selected items in accordance with the selected items selected by the first client, notifies the first client device of an item selected by the second client device, and allows the first client device to determine acceptance and rejection of the selected item.
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