1. An image management apparatus for controlling a display of a captured image, the apparatus connected to a communication terminal through a network, the apparatus comprising: a receiver to receive, from the communication terminal, an instruction for displaying a drawn image drawn by a user on a captured image while the captured image is being displayed to the user, the captured image being a full spherical panoramic image; and circuitry to generate an attachment image containing the drawn image, and attach the attachment image containing the drawn image to the captured image, the attachment image containing the drawn image being a planar image, wherein the circuitry is configured to attach the attachment image to the captured image along a normal of a straight line passing through a center of the drawn image and a reference position, the reference position representing a point of view from which a predetermined area of the captured image is within a field of view.