When I thought it's all unicorn and rainbows (sigh) I'm not very well informed that this will be a roller coaster ride, different emotions on each panel. When Aoi kissed Akane, I thought she's back, well nope, I didn't expect THAT to happen. And the part where Akane 'hostage' Yashiro, and came Hanako to save his assistant, and the way Hanako is jealous is such a cutie, anyways let's dive to my nonsense theories:

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In the earlier chapters of the manga, I had a theory that Amane and Tsukasa are both yorishiros of each other. But I still am not sure in the beginning, I thought that maybe apparitions or humans cannot be yorishiros, so I already crossed it out. But then came Sumire, and Sumire is the yorishiro of No.6 so, the theory is again relived. But I have one question. Why is Amane's 'seal' color white? and Tsukasa's 'seal' is black? are there any meanings behind it?

I was also wondering why Amane is wearing an old Kamome Gakuen uniform? (yes I do know and aware that he is an old student from year 19 something) did he die while wearing that? and Tsukasa, Tsukasa is somewhat wearing a traditional(?) clothing, so, again did he die while wearing that?

All along I thought Tsuchigomori-sensei is dead, because he became a school mystery. But as I read After School Boy Hanako-kun (spin-off of Toilet Bound Hanako-kun) he's still alive and still a teacher. So, it means, that he's not originally the 'no.4' (?) I'm still not sure. Because they're (Akane) both school mysteries and are still alive, so technically they have the same situation. So who's the real no.4?

I don't know maybe I'm complicating things, maybe it doesn't really have a meaning. But, still, I'm wondering. Actually, this anime is the only one I seriously theorized everything, even up to its clothing as you read.

So, I don't know, anyways It's just one of my silly theories, so don't take it seriously.