Sagiri is a member of the Chuuma Ninja Army who work at night to exterminate evil Youkai. She was given the task to terminate a youkai who only attacks couples. So she asks Kogarashi to accompany her. The Youkai creates smoke which destroys fibre so the couples who were attacked by the Youkai lost their clothes. Kogarashi removes the smoke and Sagiri lands the final blow and they are able to defeat the Youkai. The next day the residents of Yuragi Inn hear the Chitose is leaving for a meeting at the association of hot springs for some days...