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.
They're legendary youkai 
that migrates like birds.
Es un ayakashi fantástico que 
viaja como las aves migratorias.
Es un ayakashi muy raro que viaja en grandes grupos como las aves migratorias.
São youkai lendários, que migram como os pássaros.