The colors are mainly used for the annual battle of the classes, known as Fantastics. Fantastics was formed as a spirit activity first held in 1995. The event takes place in March, and all the classes compete against each other in various physical contests (such as a tug of war). There is also a multitude of dances that each grade performs - opening dance, boys dance, girls dance, couples dance, advanced dance, and the finale dance. The competitors wear shirts with the color of their class.