Hiccup rekindles memories that he and his childhood friend Jack, whom recently passed away in an accident, had both shared. However what he doesn't know is that Jack hasn't exactly quite left this world yet. Only problem is Jack can't recall Hiccup at all. As the two collide once again things get a bit complicated as they try to sort things out. Hiccup x Jack Frost/HiJack/Frostcup