You know what it be an absolutely amazing plot twist to happen next chapter? Tsukiyama and Kiriyama actually are different people. It's just that the former is tutoring a completely different girl that just happens to look similar to his Wolf. Because of that, Tsukiyama has ended up mistaking believing that he's tutoring Wolf, while she's now mistakenly getting the impression that her tutor is Tsukiyama.
The festival is probably the hardest to explain like this, but what if the scene we saw of "Wolf" asking "Kiriyama" to go to the festival was actually the Fake-Wolf and Tsukiyama set, where because Tsukiyama thought that he was tutoring his Wolf, he just went and met her at his own festival. Fake-Wolf was then just waiting alone at her festival like "Where the heck is he?"
The real Kiriyama might have been asked something similar by the real Wolf, but he responded with something more like "I'll see if I can," with Tsukiyama dressing up as "Kiriyama" and showing up being interpreted by Wolf as "oh, he did come!" while the real Kiriyama was actually not able to make it.
This is definitely the real thing that happened and there are no flaws in my reasoning. Nothing can break this theory, I tell you.
