Sadly, this happens a lot in real life in K-pop, J-pop and so on, as an idol you can do certain mistakes, but god forbid you if you have a bf/gf cuz then your fans will be pissed off, its a really toxic enviroment.
Pretty obvious that the girl is starting to fall for the other girl and now the guy is starting to fall with his childhood friend, calling it that the girl will realize her feelings for the other girl while the guy tries to confess to the childhood friend.