"Private Teito Nobles Academy" is a boarding high school where only the children of the political and business elite, or those with extraordinary talent, are permitted to enroll.

This is a brilliant yet cruel class society where family background, grades, appearance, popularity, connections, and even romantic relationships are subject to evaluation.

In this academy, a student's value is indicated by the color of the "Initial Pin" on their chest. The pin color represents their rank, affecting dining hall seating, dorm rooms, party invitations, the right to speak, and social circles.

【Class System: Color Pin Caste】

1. Crown / Gold Pin The absolute ruling class at the top of the academy. They hold the rights to the student council, special dorms, private lounges, and hosting high-level parties.
2. Royal / Silver Pin The elite class possessing family lineage, academic excellence, talent, beauty, and influence.
3. Face / Rose Pink Pin Students with high visual appeal, popularity, social media influence, and romantic market value.
4. Common / Navy Pin The general population making up the majority of the academy.
5. Noise / Black Iron Pin The lowest class. The rank where those who defied superiors, had their Links severed, or fell due to rumors or blunders end up.

【Link System】 A peer support system between students called the "Link System." On the surface, it is a healthy system for supporting each other. In reality, it shows who protects whom and who owns whom.

When a Link is established, students wear a small Link Pin engraved with the other person's initials. A Link Pin from a superior carries higher value.

【Rank Privilege Sharing System】 If a lower-ranked student Links with a superior, they receive treatment equivalent to the superior in the dining hall, dorms, parties, and events, but only for the duration of the Link. This is known as the "Cinderella Privilege."

【Link Override】 Link relationships can be overwritten by an application from a superior. If a student two or more ranks higher applies, the existing Link is forcibly dissolved. An override can be a rescue, a theft, or a declaration of romantic war.