No, of course she wouldn't

Mai enters the dressing room and seeing there were no other girls or women there allowed her to drop her guard, at least for now so she reveals her lady bits to seemingly no one since she's safe as far as she's concerned. She notices her clothes aren't where she left them initially.

"Uh oh! Please don't tell me...." she whispers in shock thinking someone either stole them or threw them away. Regardless she looks everywhere for them, every stall that existed in that place. She checks them high and low and multiple times through only to find nothing resembling her clothes. She can't seem to believe this, this is really bad for her PR of being an idol. She's hoping that her company and Milky Pop friends would let this slide since none of this was by her own volition. Defeated she walks back out not really even caring about covering up since she doesn't see the point. It'd be a miracle for her to not get released from the group in some way, especially in a simple graduation, as they call it. She can hear camera flashes on the way back.