A server apparatus is communicably connected to multiple information processing devices and is configured to manage a session in which content data are transmitted and received between the multiple information processing devices. A communication management unit is configured to manage a connection to the session by each of the information processing devices. An information management unit is configured to receive a request from at least one of the information processing devices and to associate collateral information about an environment with the session. An information transmission unit is configured to transmit the collateral information to the at least one of the information processing devices.