On-vehicle device, method of controlling on-vehicle device, and storage medium

An on-vehicle device includes: a plurality of agent function units configured to provide services including causing an output unit to output an audio response in response to an utterance of an occupant of a vehicle; and a content management unit configured to determine whether or not the instructed content is stored in an in-vehicle storage device mounted in the vehicle or a portable storage medium brought into the vehicle when the playback of the content is instructed by the utterance of the occupant, and to cause the playback device to play back the content present in the in-vehicle storage device or the portable storage medium when the instructed content is determined as being stored in the in-vehicle storage device or the portable storage medium.