The scene opens with the students of class a dressed in their school uniforms. The symbol is "blank card," and the style is "the kingdom of the Queen oath is freedom of hearts. The costumes are all projected, and the costumes are actually sportswear. The students discuss whether the masks represent the identities of the students. First, the students explain that they often put on masks to protect their fragile hearts. When they wear masks, they exchange identities and viewpoints, and further mutual understanding will enable the students to communicate better. The next class, class b, is dressed in masculine costumes. The oath of the class is unity, unity is strength, zone is shields, winter coats are winter coats, and so on. The girls backstage tell the students that it is the dream of all humans to be a member of class b. They explain that their class is like a feudal aristocracy. The slogan of their class, they say, is "relieved and open- minded. Everyone in the class line up to see the performance