[ He hangs his head and sighs, before he reaches into his yukata and fishes out a lone key that he drops in Katsura's hand. ]

Oi, you know that I hardly ever lock the door - and you could get in even if I did - right? It ain't gonna make a difference to have the key.

[ Is Katsura just looking for some kind of symbolic value, here? Or a sign of there ... relationship? ]