[Hmm, a thoughtful look on Hifumi's face, because that is a very good question indeed. What does truly happen when a person is no longer here and no one saw them leave? He puts a hand on his head, thinking too hard about this.]

I don't really know how it happens; people just disappear. Kinda like how one day you were at home, then found yourself here out of nowhere. I'm guessing it was like that with him too.

[Hifumi notices the house up ahead, and points over to it.]

The commute isn't that long. Home is just up ahead! Megumi-chan has been keeping your bedroom from before clean since I- [Was he really about to say he hasn't been able to because it makes him sad? Surely he cannot admit to that.] you know, I keep busy with all the other parts of the house and stuff and she likes to help when she can! So maybe after you get some rest --and I cook you something, since you're probably starving-- I'll give you a tour.

[And give him some time to hide stuff in his own room to pretend they didn't eventually share it before...]