The scene opens in a junior high school classroom, where the students are studying for their final exams. One of the students, wearing glasses, has accidentally spilled an experimental liquid on the floor. The other student, wearing a cube, has been experimenting with the liquid to see if it can help protect the environment. The student, who is called "zhugong" by his classmates, asks the other student if he is free to help him with his experiments. The two students discuss the effects of the liquid on their stomachs. The first student says that the liquid has made him drunk, and the second student says he can see the liquid. The second student asks the student to capture the liquid and use it as a weapon against the other students. The students decide to leave the classroom first, but the first student insists that he should stay.