Storm and Black Panther had been connected via backstory in an issue of Marvel Team-Up or something around about 1980. They'd met once when they were teenagers, had some fun fighting off
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, and parted ways before meeting up again in the present when the bad guys came back for revenge. Except the whole the point of that tale was this melancholic idea of "we knew each other once briefly and maybe there might have been something, but now we're adults":
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Fast-forward 20 years or so and the guys writing Black Panther (Christopher Priest, followed by Reggie Hudlin) decide to bring Storm back into the fold. Then Hudlin marries the two off in 2006, pretty much explicitly just because they're two African superheroes and Marvel's most prominent black characters. And eventually
Avengers vs X-Men happens, in which every single character involved turns into a complete retard for the sake of this stupid event and they annul their marriage because RAHHHHHHHH EVERYONE NEEDS TO FIGHT FIGHT FIGHT. I believe Storm and T'Challa have had flings here and there since, but nothing too official.