Devilman has become an elementary school teacher. However his students are scared of him and they often run away. To get over this, Devilman often wears a paper bag over his head on the principal's recommendation. This way the students pay attention to listen to the lessons. Devilman is actually a good teacher despite his scary appearance and can get his students motivated. One day, a hungry Sirene shows up rampaging through the school and in order to protect his students Devilman confronts her without his paper bag.