Color Filled[Mikayuu]

This is a world where people show there emotions by there hair color. So if your mad your hair would turn red. But there is only one strip of hair that shows the color.
Yuu doesn't like people knowing about his emotions, so he tries to hide it and tuck it behind his ear so nobody can tell. Mika, who comes in later, is proud to show it off, and he just wants Yuu-chan to express himself.