@elevown (and anyone who can give me some insight, too):
(WEP spoiler) Due to today's Wonder Egg Priority ep10 I came to the same question too, about the label(s) for the relationship in regards to the dissonance between body and mind (either by genderbending magic, or simply being trans). (Personally in my mind I just put it all in the same general box "relationships between 2 humans", but for communications and discussions, I might need a label for it.) When a (cis) straight girl knowingly likes a trans person (anatomically female body, with the mind of a man, or vice versa), the relationship should be labeled het or gay? Or it needs both tags?