After Natsume returned Amana’s name, she accused him of stealing her ring.  He has three days to find and return it before she burns down his house.  To make matters worse, the ring is trapped in the hair of a migratory youkai, and Nyanko-sensei is unable to use his powers.
You just couldn't let her 
be alone, could you?
No pudiste dejarla así.
No podías abandonarla, ¿verdad?
Você não suportava vê-la sozinha, não é?