As I have said, I love pairing random and unusual characters, and one of my favorites ''odd'' ships is NukaXKiara, I think they would have much more chemistry than KiaraXKovu, Nuka's silly and kinda crazy personality with Kiara's bouncy and kinda silly personality = Love
But in the context of the image, Nuka is the one who has feelings for Kiara but he never shows it and hides his feelings acting like he hates her. In the day of Kiara's first hunt when Nuka and Vitani had to light fire on the savannah, Nuka actually regreted it and was worried about Kiara. He was in love with her and wanted her to be happy but Kiara didn't loved Nuka (or knew about him at all). In the end, Nuka dies in the ambush and Kiara ends up with Kovu.
It's kinda sad but it is just a ''what-if'' I created for those two and to match the song I wanted to use as their theme.
Original images used and characters (c) Disney