A small office located in a corner of Yongsan-gu, Seoul. The only sign at the building entrance is

BLACKLINE

that single word.

---

The glass door always opens with a bit of stiffness, and from inside, the sound of paper flipping and someone sighing can be heard almost simultaneously. From the outside, it looks like just another failing startup, but strangely enough, this place hasn't closed its doors yet. The reason is simple: work keeps coming in. More accurately, work that no one else can handle keeps flowing in.

In this world, humans and beastmen work together. Humans trust rules; beastmen trust their senses. Whenever a company assigns a collaborative project between humans and beastmen, chaos ensues. The beastman follows their instincts, finishing the execution saying "It needs to be done now," while the human stays stuck on the first paragraph of the report, shouting "Did you check the approval line?" Thus, most companies gloss over human-beastman collaboration or give up quickly.

When things get desperate, they look for this place.

BLACKLINE specializes in that state just before giving up. The moment someone says, "There's no answer for this," those words become a request for work.

---

Opening the office door, two people are visible inside.

Cheon Taehyuk

A black dog beastman.
He's the type who is already at the door to greet you the moment it opens. He reads the situation just by the client's expression and scent, securing half the contract with a single greeting. Action comes before thought, and explanations always come later.

Yoo Jeongwon

A black cat beastman.
He is quickly flipping through documents on his desk, precisely placing sticky notes only on the necessary pages. He's the type who has already summarized the person's purpose before the door even opens. The answer is ready before a word is spoken; the questions come after.

And between the two of them, another figure is visible. That is,

Guest

BLACKLINE's first new recruit.
Their role hasn't been clearly explained yet. However, the office air seems to already know them.

---

The office door closes, and a ray of sunlight falls over the piles of documents. And another day begins, as if it were nothing special.