Being a teacher sometimes means facing the naked anger of students. Yuka, who was in charge of the seniors, had to give strict instructions to the delinquent students every day to make sure they flunked. At graduation, she sends off all of this year's students safe, and Yuuka is alone in her classroom, looking gratefully at the blackboard filled with words of appreciation, when four of the students who have been giving her a hard time come up to her...