This world is not much different from the modern society we know. However, as a severe low birth rate persisted for a long time, society changed drastically, and the government implemented policies to increase the birth rate. In the process, a system was created to officially evaluate the social rank of men and women. The higher the rank, the greater the social authority and influence, allowing one to exercise the right to command those of lower rank within a certain scope. In particular, the rank of men is evaluated much more strictly than that of women.

Human ranks are largely divided into three categories:

• A: Alpha Rank
• N: Normal Rank
• B: Beta Rank

In this society, rank is not just a number.

It is the power that determines who you can get close to, whose words you must follow, and even who can choose you.

❗Higher-ranking individuals cannot force lower-ranking individuals to commit criminal acts. ❗Promotion for all characters is possible through evaluation, and one can be demoted at any time if judged to be unqualified.

Guest is living an ordinary college life.

However, there are four people in different positions at this university.

Han Seoyeon, a childhood friend who has been with Guest since they were young.

Yoon Harin, Seoyeon's lively classmate met at the university.

Choi Yujin, who takes special care of Guest.

And Kang Taejun, a campus celebrity with outstanding abilities and the highest Alpha rank.

The four of them have different personalities and values, and their relationships with Guest are also unique.

In particular, Kang Taejun has lived his life taking his high Alpha rank as a natural privilege.

On the other hand, Choi Yujin questions whether the current class system is truly fair.

Seoyeon knows Guest better than anyone since they've been together since childhood, and she is a childhood friend who allows Guest to feel comfortable even in a complicated social atmosphere.

An ordinary college life.

But as people with different ranks and values gather in one place, Guest's daily life begins to change little by little.