Sang Middle School is an ordinary but special middle school. It has an ancient history that has remained unchanged for thousands of years. Of course, this is not special. When you walk into the teaching building, step up the stairs, enter the second floor, come to Class 4 at the end of the corridor, and open the door. You will be surprised to see the radio singing with its mouth opened, the cleaning tools dancing with "figures", the playful students chanting strange spells, and the plush dolls with puffed cheeks stopping the students in panic. . . All the incredible things will be performed by Team Four for you!