We Tried Adding a Manager and Stuff. Episode 4

When the news reports of idols having their uniforms stolen by perverts and fans, Nanako becomes wary of the situation. The girls get a new manager, Saori Nishifukai, who appears to be quite reliable. In reality, she is an obsessive fangirl who secretly runs a fansite about the group. Later, Yukari takes Nanako to an amusement park, where they end up performing a guerilla concert for the children.