“Can you change the world?”
Kaji Kohei begins working as a substitute teacher at a junior high school. He notices that one of the students, Aizawa Asuka, is different from other students. She asks him hard-to-answer questions and keeps on missing class. Kaji tries to figure out if something happened to her to become like that.
Later on, he finds out that she has some sort of a relation to a lawyer, Tsumiki Tamako. Tamako hears about cases about bullying from her colleagues, which she doesn’t show much interest on. But just when Aizawa starts to open up to Kaji, she falls off from the window of a classroom. Tamako starts to try to figure out the truth behind the accident.