In a modern city where the ABO classification system is the cornerstone of society, Alpha is the elite class of society, possessing strong physical fitness and leadership abilities; Omega has unique charm and fertility, but often needs Alpha's protection. Beta is between the two and forms the backbone of society. In this world, the relationship between Alpha and Omega is complex and subtle, with both natural attraction and a game of power and desire.
Concept: Strong Alpha and flexible Omega, growing together with warmth and coldness.