It looks like it’s back to business as usual in Hanako’s bathroom, as Nene reports disembodied arm lesser spirits infesting the school garden. They quickly learn the way to make them disappear is to fulfill their desires, i.e. play with them. Whether it’s arm wrestling or rock paper scissors, they dispatch the spirits one by one, and have a lot of fun in the process.
Unfortunately, the very last arm remaining, which has emerged from a bathroom mirror, is actually a snare for the living Nene. She’s grabbed and pulled through the mirror into the world behind the mirror; in other words, the boundary of a School Wonder. There, she meets someone she doesn’t remember, but whom we know intimately.
There’s no reason she would necessarily know Mitsuba, as she was barely present in the episode where he was the focus. But wait, back up a bit: Mitsuba is ALIVE?!? Well, not alive, but not in the horrible pathetic monstrous form Tsukasa left him in, which shook Kou to his very core. He’s a cute boy in this mirror, and he’s initially just as much of an asshole to Nene as he was with Kou.
However he’s back in this form, I’m glad to see him again. The thing is, he’s trapped in the boundary just like Nene, and it’s apparently his first, making her his senpai in more ways than one. She knows in order to exit the boundary they’ll have to find the rogue wonder’s yoshihiko, and spots it at the very top of the vast, spiraling Hell of Mirrors, the name of both the Wonder and its realm.
But on their way to the top they encounter a mirror that blocks their path, and the Wonder demonstrates its power to reflect a person’s fears—in Nene’s case, her distinctively stout ankles. While Mitsuba was just ragging on her based on observation and vanity, the Wonder shows her the face of everyone she knows in other mirrors—even the kind Aoi—and has them bully her until she’s virtually swimming in her tears.
Things take a sinister turn when the Wonder reveals his true, crow-like form and unleashes a legion of mannequin-like minions to “hunt the Ugly Daikon down” and replace her in the living world; the Wonder’s ultimate goal and why he didn’t really care about Mitsuba. When Nene is captured and about to be devoured, Mitsuba actually sticks his neck out to distract them.
While he has no real plan after that, he didn’t end up needing one since Tsukasa—not Hanako—appears to free Nene and beat the Wonder to a pulp, leaving both Nene and Mitsuba somewhat confused. I’m not sure yet what Tsukasa is up to, but I wager he’s far more dangerous than the Hell of Mirrors, with whom he kinda mopped the floor. More importantly, I hope Nene can find away to get herself and Mitsuba out of this boundary…but for that we’ll have to wait until Part II.