In-vehicle system, vehicle, and information processing device

An information processing device comprising one or more processors configured to control a display device, wherein:

• the display device includes a first display and a second display;
• the first display is configured to display interfaces each including a manipulation icon that is manipulated by a driver of a vehicle, the interfaces being interfaces relating respectively to a plurality of first predetermined functions belonging to the vehicle;
• the second display is configured to display interfaces relating respectively to a plurality of second predetermined functions belonging to the vehicle, the second predetermined functions being functions other than the first predetermined functions and including an agent function of outputting proposal information for the driver;
• and
• the one or more processors are configured to execute outputting the proposal information to the first display in a case where an interface relating to one of the first predetermined functions that corresponds to a predetermined proposal condition being met is displayed on the first display when the predetermined proposal condition is met, the predetermined proposal condition being a condition under which information relating to one of the first predetermined functions is supposed to be output as the proposal information by the agent function.