Short story about this drawing: Kylo sees that Hux rarely talks about his emotions due to insecurities and so they agree to exchange letters every time they are able to see each other in private. In this picture Kylo is reading the message that Hux wrote while away on a mission (unable to send it to Kylo as he was afraid of it being intercepted by others who had access to the First Order transmission system) – so they have a special disconnected datapad for this purpose.
TechieHux 