Responses
Isn't that normal in Asian culture--they call the person by their title, even if they are in a relationship? So, Professor if they are that person's professor or Manager if they are that person's manager/superior. I'm not sure, but I've seen it a lot in mnaga/manhwa/webtoons/etc.
theyre literally in a whole ass relationship and hes still calling him professor!?? its just weirdddd ╮(￣▽￣)╭