Well, I guess it does work if Karon is actually secretly in love with Irish but is suppressing it because of work issues...
Hmm, that is actually a likely suggestion... She'd be nice to Irish, like she always does after realizing that she fell for Yuu-kun, but withholding it in order not to scare him, and not to let the other idols down. Karon and Irish's interactions would look the same before and after her realizing it, except there's a hidden meaning beneath her smile...
...like a true idol drama/romance...
...then situations like this make it appear for a brief moment!!
ERAS, YOU GENIUS, YOU GAVE ME THE ANSWER TO YOUR QUESTION!!!
