I don't want to be a spoilsport but don't idols in Japan always busy and have tight schedules?
How the hell did she still has the free time to do some stalking?
Heck, this is just a work of fiction so what do I know.
@Kyxr
Give it a few chapters and we might see.
It's not that uncommon for authors to give a crossdressing chapter or two for these kinds of characters.