Episode Title:Symposium.Episode Description:During a school assembly, Shinichi is dismayed upon discovering that Ryōko Tamiya, the new math teacher, is another Parasite and is aware of his secret. After math class, Shinichi privately meets with Ryōko in the counselor's office, where she requests to meet with her after school to discuss matters about Parasites, seeing as she is not interested in fighting him. At a restaurant, Ryōko introduces Shinichi to her partner Mr. A. Ryōko reveals that she is pregnant, therefore Parasites are capable of reproducing humans. Mr. A leaves the restaurant, considering Shinichi to be a threat. The next day during math class, Mr. A intrudes the campus, forcing the students to evacuate the school. Since Shinichi disagrees with Migi's suggestion to use the crowd of students as a shield, Shinichi runs to the top floor and barricades the area with desks in order to lure Mr. A away from the students.