Same here.
It was going well before the ball, then the author choose to make him fight monsters while Leo goes instead. To me that broke the progress. At that moment, I'd ve preferred if they kept ot just about building their chemistry without having Leo go with her to the ball.
That would've been my choice.
This story was one of my favs, but lately I just read out of curiosity.

Im very happy for the new romantic dynamic, don't get me wrong, but I don't feel so much alchemy between the two. It would have been better maybe with some more chapters of "flirting" between the two for to make it feel more natural I think