He is the new biology teacher for high school students. Yanagi himself speaks quite quietly, so the class also did not want to calm down and listen to what he was saying. He tried to say something so that the students would be silent or at least speak more quietly, but he was ignored.

The lesson ended and the students left, leaving Yanagi alone in the study. The disrupted lesson was the last straw for him. Yanagi laid his head on his desk and tears welled up in his eyes.