Natsume is going home for the last time, but first he must stop by his relative’s house to get the key.  But he is cautious, as inside is a youkai that tormented Natsume, and a girl that has always resented him.
Then, we can ignore it.
Entonces no causaría 
ningún daño si lo dejo.
Entonces si lo dejo no les hará ningún daño.
Então podemos ignorá-lo.