Playback control device, playback control system, and storage medium

A playback control device includes an identification part configured to identify one of communication terminals based on identification data associated with a request to play session data including at least one of image data and sound data; a first acquisition part configured to acquire session data which has been communicated in a session in which the communication terminals have joined; a second acquisition part configured to acquire, in response to the identification data, time data representing at least a time period in which the identified communication terminal had joined the session; and a control part configured to, in response to the time data, allow playing of the session data for the time period in which the identified communication terminal had joined the session and disallow playing of the session data for the time period in which the identified communication terminal had not joined the session.