While the rivalry between Magius and independent magical girls continues to escalate, but for Iroha, this isn’t about factions or loyalties. It’s about her sister Ui. As soon as Sana mentions Nemu, she seeks out Amane Tsukuyo at her school, where her family name is “Akatsuki” and she leads the koto club. Tsukuyo demonstrates the contrast between she views Iroha (a threat who intends to interrogate or even torture her) and how Iroha views her (a someone she can have a calm coffee chat with).
By the time they’ve had their calm chat, Tsukuyo has learned that there need not always be rancor and mistrust between their sides. She can even relate to Iroha’s need to find her sister, being so close to her own. That said, she’s still not ready to say anything about Nemu, and tells Iroha she’ll have to clear things with Miufuyu first.
While waiting for an answer, Iroha joins Tsuruno, Felicia and Sana on another shopping trip, this time to purchase some coasters as a thank you for the personal mugs Yachiyo bought them.
They find some pretty sakura-themed ones, but they’re immediately stolen by a witch, which they make quick work of to secure the gift. They set up a cute plan to surprise Yachiyo, who is coming home late.
What was to be another goodwill bonding exercise to bring the girls of the Villa closer together and feeling more like a family is pretty much ruined with the unexpected arrival of Mifuyu, who strides right in and treats the place like it’s her own home—because it was, for seven years.
Mifuyu dismisses Iroha’s attempts to play hostess and grabs her own mug from the cabinet Yachiyo warned her never to open. But Mifuyu isn’t there for Yachiyo—whom she’s apparently given up trying to convert—but Iroha. If she wants to learn about Nemu, she should consider joining Magius.
Mifuyu also invites Iroha and the others to a Saturday afternoon “lecture” on how Magius is “liberating” magical girls, at a place called the “Memory Museum”, itself home to another Uwasa. Yachiyo comes home shocked to see Mifuyu, and Mifuyu doesn’t hesitate to prick her in the side with a verbal thorn about having “made friends again,” and how it will probably go as well as last time.
This puts Yachiyo in such a sour mood she simply retires to her room, before her roommates can present her with a gift. It’s just not the right mood anymore anyway. But once she’s in her room, she’s greeted by her witch-ified reflection (perhaps her Doppel) thanking her for “bringing more friends” to her. Could this be Mikazuki Villa’s Uwasa? Should Iroha and the others be worried for their safety?
Clearly against Yachiyo’s wishes, Iroha, Tsuruno, Felicia, and Sana head to the lecture, leaving her alone. Iroha asks Yakumo and Momoko for the location of the museum, and Momoko later tracks down Rena to tell her the truth about Yachiyo’s Villa. It’s a good thing Iroha told them where she was going, since the Museum looks more and more like a trap the deeper they explore.
That said, after climbing a wall full of drawers (no doubt containing memories), they are met by a voice expressing surprise they actually showed up. It’s not Nemu, but the other girl who was with Ui in the hospital: Satomi Touka. It may have been a circuitous path, but maybe Iroha will finally get some answers about her sister’s whereabouts.