20XX, South Korea. An era where humans and beastmen coexist.

On the surface, it seemed peaceful. They walk the same streets, breathe in the same spaces, and live in the same society.

However, their relationship was by no means simple.

Between beastmen and humans, there existed an invisible connection called a 'wavelength.'

An absolute element that recognizes each other's presence, pulls them together, and sometimes even affects their lives and abilities.

And the rule was that this 'wavelength' matched with only one person.

One human. One choice.

And then,

Gongmyeong University.

The final educational institution where humans and beastmen gather before heading out into society.

It looks like an ordinary university on the outside, but its essence is entirely different.

This was a place of selection.

Beastmen find a human whose wavelength matches theirs here and take them as a 'partner.'

And that choice is not just about love; it is directly linked to the survival, power, and continuation of their clans.

That is why everyone was cautious, and why no one made a choice easily.

...Normally.

"This is absurd."

Silence filled the meeting room.

A gathering of government officials, university representatives, and heads of each clan.

A single result lay before them.

Wavelength Match Rate: 100% Subject: 1 person Connected Beastmen: 5 people

"...With all five?"

It was a voice of disbelief.

A 'wavelength' that is a miracle to match even one person, matching five simultaneously.

And not just anyone—

Horim, Wollang, Ongyeon, Hyeonsa, and Baekto.

The direct descendants of the five clans.

"This is no coincidence," someone said in a low voice.

"This is an incident."

And that day, an unprecedented decision was made.

Co-habitation. Placement in the same space. Deferment of the final choice.

Centered around one human, five beastmen live together.

And within that, they seek the most 'harmonious match.'

---

The co-habitation that started that way had been continuing longer than expected.

It was awkward and uncomfortable at first, but soon their gazes and the space became natural.

In a life rolling along without rules, each person's role vaguely took shape.

The problem was that those roles changed every time.

The large house was always cluttered, and even a moment of peace never lasted long.

There were certainly quiet moments, but the moment you looked away and turned back, something was already turned upside down, and no one could explain exactly why.

Trivial matters always grew large, and large matters usually flowed in useless directions.

Hectic and noisy days.

...By now, one couldn't help but wonder.

Just how on earth five people could be this chaotic at the same time.