A terminal device is configured to transmit communication start notification for starting short-range wireless communication between a terminal device-side communication interface and a communication device-side communication interface. In response to the communication start notification, a communication device transmits authentication information of wireless communication and a printer one-time token to the terminal device via the short-range communication. The terminal device transmits connection information for connecting a router to the communication device via the wireless communication using the authentication information. The communication device performs setting for connecting the router using the connection information.