Sayonara, Zetsubou-Sensei Episode 12 — Really, That's Annoying!
Published April 13, 2012
The first part of this episode introduces Ai Kaga, a girl who always takes the blame for everything, even though it is not her fault. Nozomu takes the class to a "guilt scramble" to explain that history has led to the "guilt complex" such as Ai's becoming the Japanese mentality. After being overcome with guilt himself, Nozomu and Ai travel the world to try to stop burdening others. The second part introduces another girl, Mayo Mitama. Her evil-looking eyes have led to her being misunderstood - that is, she actually is evil, but people try not to prejudge her and assume she is actually good. She commits several cruel acts that Nozomu bears witness to and is blamed for, being the only other nearby party. He becomes so concerned with not prejudging that he doesn't blame her when she hits Majiru over the head with an aluminum bat, drops a brick onto Nozomu's head, or detonates a bomb in his house.