
If for some instance, the Tsukasa in the Red House is the real Tsukasa, then who was the one abusing Amane until his teen years and who did he kill?
I'm thinking that maybe these all have to do with the revelation Kou learned about how someone can become a supernatural. What if after the house ate(?) the real Tsukasa, a fake Tsukasa (prolly a supernatural) who has the desires of real one became his substitute, then that would mean that the one abusing Amane before and the Tsukasa haunting the school was the fake one since the real Tsukasa can't leave the Red House. From chapter 75 (i think), Kou said that Mitsuba after becoming a supernatural was still like the real Mitsuba, but at the same time different from the real Mitsuba, which made me a little sure that maybe that's also what happened to Tsukasa. Idk, I'm just connecting things from the given details on the previous chapters.
Also chapter 34, Tsukasa mentioned about Frakentstein which I believe also got something to do with his situation.
Bigger? (⊙…⊙ )