I Won't Forget You (Karlnapity)

Karl is slowly his memory and himself but he hasn't told anyone why or what's going on, his fiancé's are getting worried for him since he's slowly going off somewhere for long amounts of time but when they try to confront him he brushes it off and changes the topic but what happens when they finally find out the truth? What will change and what won't? What will happen when Karl slowly disappears for longer amounts of time?

This is based off the events from the DreamSMP and Tales Of The SMP, non of what I write is canon but based around canon, I am not shipping the irl people but their mc skins and characters, pls don't give me hate because I cannot handle it, thank you :)