Adette, who by chance became a teacher at Gaynor's school. However, her personality didn't suddenly change, and she was violent and ended up stealing the students' food. Accused of food shortages, Adet summons the students in the middle of the night under the pretense of class and attacks a freight train on the Trans-Siberian Railway. In the midst of this, he runs into Shabori and the others who come to patrol the Undergolem, and the situation changes completely. Gainer struggled against the Siberian Railway's counterattack, but Adette's skillful guidance led Gainer to victory. Will this lead to Adette staying in Gaynor's room and teaching him directly?