[after five seconds, Mafuyu might hear the sound of feet running up to the door (but she's probably hammering too hard to hear anything else)

after ten seconds, the door gets yanked clear open, because frankly there is no one else Tatsuo knows who would abuse his poor door in such a manner except a certain tough-talking teenage girl

he makes sure to stand well back though, so as to avoid getting punched in the neck or something]

There's a doorbell, right there, you know.