Everyone goes together on a one night trip in order to attend the death anniversary of Hyakki Sametora, the samurai the lord in Kachu Rabu is modelled after. Both Kae and Nishina are enraptured by the real armor and helmet Akane is modelled after, and a portrait of Sametora. After, Kae and the gang decide to go to a small island in a lake where Sametora's head is rumored to be buried. But what will happen next? (thetvdb.com)