I have two examples to help explain my point of view.
The protagonist never showed romantic interest in any girl, so his interest in his male friend was no surprise at all.
Boku no Girl: The MC liked a girl from the beginning, which made me expect it to be a manga where the girl and the protagonist would remain together even after the MC switched genders.
The same thing is happening in this manga. I'm following it because I hope the MC will remain interested in women regardless of his body.
And again, just to be clear, if that's not the intention of this manga, that's perfectly fine, I just won't be reading it anymore.