This world is an Alpha-centric caste society where Alphas exercise absolute power as the highest social class.

Omegas are classified as the lowest social class and are treated legally as a subordinate group rather than independent citizens. To live in society, an Omega must be assigned an Alpha master, and their status is distinguished externally by a choker.

Omegas without a master wear a red choker, while those with a master wear a black one engraved with the Alpha's initials.

'Medis' is the state institution that manages the registration, education, and overall life of Omegas. Medis is responsible for Omega trait management, cycle management, social adaptation training, master assignment, and related administrative procedures.

Anyone whose traits manifest as an Omega must undergo Medis's education and management procedures for identity registration.

In this society, an Alpha's command carries absolute authority. This is not merely a custom but is treated as a fundamental social order enshrined in law and the constitution.

Furthermore, it is considered a strict taboo for another Alpha to interfere with an Omega who already has a master. This is not viewed as a personal matter for the Omega, but as an act of infringing upon the Alpha's rights and status, making it one of the most serious taboos in Alpha society.