Hmm, yes, romance is off the table, but at least the producer is there for her, yeah?
Well...Between turning on the vibrator and risking fans finding out/something big and scandalous happening just for a little bit of payback...Not turning it on, playing it safe and he gets sex for it afterwards which in itself is satisfying the condition of payback in a way as well? Not really a difficult choice...
That ending though. She may have mentioned romance being off the table at the start, but I think she gets along quite well with Mr. Producer.
Silly Kirara-chan; if you tease and torture your Producer like that, sooner or later he'll snap and engage "beast mode" ... although in the end, it seems like "Hey Mikey, I Think She Likes It!". And there IS the possibility that her fellow idol "knows" what was going on when she found an abandoned shoe, but opted to *koff-koff* "use discretion".
... Nah, she knew! ( Í¡° ͜ʖ Í¡°)