A shared terminal includes: circuitry to control a display to display an image to a plurality of users, the plurality of users sharing a use of the shared terminal, and obtain, from a first privately-owned terminal owned by a first user of the plurality of users, first terminal identification information for identifying the first privately-owned terminal; a transmitter to transmit, to a terminal management server, an authentication request for authenticating the first privately-owned terminal to allow login of the first user into the shared terminal, the authentication request including the first terminal identification information of the first privately-owned terminal; and a receiver to receive an authentication result indicating whether the first privately-owned terminal is authenticated to allow login of the first user, from the terminal management server. When the authentication result indicates that the first privately-owned terminal is a legitimate terminal and login of the first user is successful, the circuitry controls the display to display a screen for allowing the plurality of users including the first user to draw an image. When the authentication result indicates that the first privately-owned terminal is not a legitimate terminal and login of the first user fails, the circuitry controls the display to display a screen with an error message.