Iroha has a new home with Yachiyo and Felicia in Kamihama and has transferred to the same school as Tsuruno, Kaede, and Rena, but still feels like something is “missing” from herself. This is probably due in part to all of the recent upheaval in her life—not to mention the normal isolation that comes from becoming a magical girl—but for now she’s determined to fill that void with the investigation and search for Ui, and hopefully Ui herself.
To proceed, she needs more rumors, so she goes to the rooftop and finds Rena, who along with Kaede hadn’t been answering texts, but didn’t receive any. What with the strange behavior of Iroha’s phone in the cold open, it’s a good bet something is up with peoples’ devices. Rena is still uncomfortable being friendly with…well, anyone, but appreciates Iroha reaching out enough to share two rumors: “the Invisible Girl” and “Endless Solitude.”
Like Rena, Felicia seems unaccustomed to the give-and-take of a conventional friendship, and even flashes a bit of tsundere when she reveals she got in trouble fighting high school girls who were talking shit about Iroha and Rena. Felicia accompanies Iroha to the Chuo radio tower where a third “Radio Wave Girl” rumor was started, and sure enough, they hear the voice of a girl. Only she’s not crying, she seems to be giggling; never a good sign.
As Iroha deals with the other girls in class talking about her, she continually receives odd texts on her phone she dismisses as spam, but eventually grow specific, and start to overlap with the rumors about Radio Wave Girl. That leads her back to the tower, where she encounters one of the twin sisters with the Wings of the Magius, who mentions the name “Sana Futaba” when Iroha mentions the texts, but isn’t about to let Iroha leave.
Reinforcing the overall feeling that many magical girls are often uncomfortable or awkward in friendships but still come to each others’ aid in a pinch, Iroha is backed up by Yachiyo (whom she texted earlier just in case), Tsuruno and Felicia.
The twin’s “pet” witch is dispatched by Yachiyo and the four magical girls regroup at a restaurant, where Iroha finally responds to the spam-that-is-more-than-spam. The mystery text-sender urges Iroha to come to the Endless Solitude. No doubt that’s where they’ll find this Futaba girl.