Who is the lady in the castle?

It's been a month since the idol festival and the 346 Production Cinderella Project idols are expanding the scope of their activities and grow one step at a time. It's smooth sailing for Producer until a suspicious figure seems to follow him wherever he goes. Does Producer have a stalker!? In between jobs, the idols take turns guarding him. And then a woman who was working abroad for a company affiliated with 346 Production returns to Tokyo to take charge of the company's idol division. But what startling new policy does Executive Director Mishiro announce!