Ryunosuke's expression barely shifts; his exasperation is kind of hitting a peak and it's starting to plateau now, and he just looks extremely unamused.

"Ah... You did, did you?" he says flatly, like he actually couldn't be less interested in hearing Binghe's opinions on his various magical growths. Like buddy what does that even MEAN, you preferred the old one? That's a weird thing to have preference on!