[MAJOR TBHK SPOILERS DONT READ UNLESS YOU'VE FINISHED THE MANGA] --- summary: the red house connects to a boundary --- theory below vvvv actual theory: i was looking for tsukasa for an edit & i found this i think there is a mirror connecting to the hell of mirrors/no 3's place in the red house, which may be where baby tsukasa will lead kou (or away) the one night, two dawns thing may refer to the severance, but though there apparently no way to cross to the boundaries after the severance, natsuhiko knows how to be a supernatural, & kou thinks it may work even after the severance since natsuhiko knows how to become a supernatural, he probably got it from tsukasa or sakura since tsukasa probably knows how a human can be a supernatural (& maybe vice versa), especially with the mitsuba stuff, he might know how to get humans (& possibly supernaturals) to the boundaries i think baby tsukasa is him, or at least knows how to get into a boundary, & the red house is his gateway to the boundaries also since teru says that the red house is cursed & not to enter, i dont think hes been inside there himself, so when he says hes checked all over for cracks into the boundaries, that could be an exception, nene was taken by some force/magic/supernatural & kou enters a weird room, meaning there are still supernaturals there, and possibly a crack
