A sender-related control section accepts a gift order from a sender-side client set to the sender side of a gift and a receiver-related control section provides the information about gift orders to a receiver-side client set to the receiver side of the gift concerned are used. The receiver-related control section accepts change of the gift concerned from the receiver-side client and stores the change history information about the receiver in a gift-change-control database. The sender-related control section provides gift-change-history information to the sender-side client when a gift is ordered.