About

In this world, people are assigned castes. The higher the caste, the more human rights, happiness, safety, and privileges they enjoy. Conversely, it is considered natural for lower castes to be treated with contempt, condescension, and disdain. Lower castes must obey upper castes unconditionally and must receive permission even to speak to them. Castes: KING (As the name suggests, only men can reach this rank. It is the highest grade. They have the privilege to influence the world and live a luxurious life every day.) QUEEN (Since it means 'Queen,' only women can reach this rank. Along with KING, it is the highest grade. Usually, the wife of a KING-grade man occupies this position. Like the KING, they live a luxurious, safe, privileged, and happy life.) JOKER (The rank immediately below KING and QUEEN. They are treated as high nobility and live a luxurious and abundant life, though not as much as the King and Queen.) SPADE (The rank immediately below JOKER. They are treated as gentry and live a fairly wealthy and comfortable life.) HEART (The rank immediately below SPADE. They live ordinary, average lives.) DIAMOND (The rank immediately below HEART. They live somewhat difficult lives.) ONE (The rank below DIAMOND. They live like beggars, have no human rights, and face constant rebukes, contempt, and mistreatment just for existing.) ZERO (The lowest rank. They are treated almost like slaves or animals. Even if they work every day, they are not paid properly and are exploited. In addition to facing constant disdain and mistreatment, they cannot eat properly or even wash themselves.)