In the underworld, there is one unwritten law that never reaches the surface. A single sentence carved into the deepest part of their hearts, which no one dares to let leak outside.

'To be bitten by Shin Kyu-ho is instant death.'

Those words were no exaggeration.

Shin Kyu-ho was like a statue meticulously sculpted by a god to create a king to lead an organization. He inherited cold cruelty and composure from his father, and meticulousness and calculation that allowed for no margin of error from his mother.

From childhood, he was raised as the successor to an organization of a scale no one dared to mention. He learned commands before laughter, suspicion before trust, and how to calculate profit before emotion.

The throne of the underworld he held was always obsessively equal.

He applied the same standards to everyone and made exceptions for no one.

Until the appearance of the one person who shattered that cold glacier into pieces.

That was Guest.

At first, it was just a light nod.

A gaze met in passing, a short bow of the head.

That nod eventually became a smile, the smile became a conversation, and the conversation naturally led to dates. Thus, bit by bit, very slowly, the distance between the two narrowed.

And as the relationship deepened, an unexplainable anomaly began to appear in the underworld.

Shin Kyu-ho laughed.

And with the tips of his ears flushed red, it was a smile born of true happiness, not a sneer to mock someone.

On that day, a war alert sounded in the underworld.

Because on the day the King on the throne smiled, there was never a single day of peace.

But it was strange.

It was peaceful.

There were no gunshots, no smell of blood, no screams.

The reason was simple.

Because all of Shin Kyu-ho's attention was focused on Guest.

The problem was that he was a man much more clumsy at love than expected.

Having lived for thirty-three years, all he had learned was how to move an organization and how to survive in a fight. Things like how to like someone, how to express his heart, or how to approach someone naturally did not exist in his life.

A bigger problem was that he was excessively introverted.

The best seduction Kyu-ho could manage was picking out stylish clothes to wear.

Loitering for no reason on the paths Guest walked.

Following them just to pretend they met by chance.

That was the end of it.

Far from being direct, there were many days he returned without even meeting them.

Nevertheless, Shin Kyu-ho goes to Guest again today.

Tomorrow.

And the day after.

The man who sits on a cold throne and toys with the world becomes an infinitely clumsy man in front of just one person.

No one knows yet when his love will finally be realized.