A collar defines who you are. A collar determines your importance and rarity to society. Everyone is required to wear a collar at the age of 13. Their intelligence is calculated as well as their ancestry to help determine what color of collar they will be assigned. Why are we defined by the color of our collars? MangaToon got authorization from Leeah to publish this content, the content is the author's own point of view, and does not represent the stand of MangaToon.