"Boohoo" is expressed as the passionate light of red, "AM0:40" is expressed as the youthful blue light that is eager to see the future, and "Walts" is expressed as the calm green that floats in the sea of lights. This is the triple A-Side Single CD that's made according to the main theme of "RGB". The trinity of 3 songs is designed in 3 colors on the front side of the 3 sided inner-booklet. Each sides has its own color and when they are folded together, they become one 1 triangle.