Kazuya wakes up with the mother of all hangovers, but also an odd fuzzy memory of Chizuru having taken care of him last night. He’s not sure if it’s just a fantasy, but what is real is that he was invited to a chat group that includes Chizuru’s private contact (not the Rental GF one he has and cannot use when not renting her).
He stops himself from adding her as a friend as it would send her a notification, but fantasy and reality once again collide in his booze-addled brain when he finds an energy drink in his fridge with a hand-written note from Chizuru (reading “Drunkard!”) that proves she was indeed there. We also cut to Chizuru also contemplating hitting the “add a friend” button for Kazuya.
To me, all this means that Kazuya and Chizuru want to and probably should start acting like the neighbors and good friends they so clearly are, only their personal hangups and the fact Kazuya is always renting her services keep things cloudy and complicated. This week also reminds us that Ruka is technically his actual girlfriend, and at work she checks in with him on whether he’s ready to make them “official.”
Kazuya is saved by a customer arriving at the otherwise-deserted parlor, but that customer turns out to be Mami, who heard from Kibe that he was working here and decided to stop by and mess with him (she says she’s kidding, but she isn’t). Her plans are utterly stymied by the presence of Ruka.
After Kazuya tries to sidestep Mami’s and Ruka’s curiosity towards one another, Mami is simply too friendly to Kazuya for Ruka to remain silent and professional. She grabs Kazuya and makes it clear that they’re dating, then embellishes things by claiming they’ve gone all the way, and basically condemns Mami as his ex for coming by his work at all.
Mami has her knowledge of Chizuru as a rental girlfriend loaded, and decides to use it, but it misfires, as Ruka is not only aware but seemingly okay with it? Mami retreats for now, if not defeated, utterly bewildered by what the heck is going on with her ex. Ruka ends up in tears over the ordeal, and Kazuya can only sit and wait for her to cry it out.
Note, Kazuya is not to be sympathized with here—all of this is his doing, and if he were honest to Ruka about not having feelings for her, they wouldn’t be in this unsustainable “half-relationship” that is so easily threatened by a passing ex. If anything, I sympathize with Mami, who on one occasion asks herself why she’s wasting her time even thinking about Kazuya and his palace of lies.
The answer the show implies is that as much as she doesn’t want to admit it, she’s not over the guy. I prefer the interpretation that she’s infected by the same brain worms as Chizuru and Ruka, which beyond all logic and reason render Kazuya a halfway tolerable presence. (Sumi, the best girl, is either immune or not infected due to how rarely she and Kazuya interact.)
Speaking of Chizuru, she returns at the end of the episode boarding the same train as Mami, and a deeply awkward train ride ensues, with Mami being not subtle at all about the concept of obtaining items while they’re as new as possible lest they fall out of fashion. On the surface, she’s talking about Chizuru’s bag, which Mami identifies as having been in Kazuya’s apartment that one night.
Because Mami cannot for whatever reason stop thinking about Kazuya, the gears in her brain continue to churn late into the night, as she attempts, like a private eye, to piece together Kazuya’s intricate galaxy of stupidity. While Ruka’s account is locked, Mami finds Kazuya’s grandma, and decides to follow her in hopes of gathering more intel.
From Yuuki Aoi’s half-bored, half-threatening, alway mocking sing-song lilt to the design of her disheveled hair and dead eyes, Mami is always portrayed as a potential chaos-spreading force, and the show seems more often than not to side with Kazuya and the others over her, as if she were reaping what she sowed by dumping Kazuya before fully realizing how she felt about him.
But I don’t see Mami as a villain. What Kazuya is doing is far more villainous. Mami may be looking to score points or exact some kind of vengeance, but she’s also trying to get at the truth of matters, and the truth is Kazuya’s relationships with Chizuru and Ruka are fundamentally flawed and require serious work.
Kazuya should have dumped Ruka, confessed to Chizuru and been rejected, get over it, then asked out Sumi, with whom he is the best version of himself, long ago. The excuse of not wanting to disappoint his grandma has long since ceased holding water. If he insists on maintaining the status quo, stringing Ruka along while he and Chizuru push and pull towards and away from one another, I welcome Mami’s efforts to break that status quo.