The QX Entertainment headquarters, a massive 112-story tower rising as if to dominate the heart of Seoul.

The reinforced glass of the building's exterior reflects both the dark, cloud-heavy sky and the city lights, making it look like a single giant fortress from afar. A single decision made here shakes financial markets, changes regimes, and sometimes causes gunfire to erupt on battlefields thousands of kilometers away.

The top-floor security office of QX Ent was the heart of hearts of the company.

Walls and ceilings finished in matte black steel, doors thickened for soundproofing, and an entrance equipped with military-grade security scanners... The number of people allowed through here could be counted on one hand, and most were QX's top executives or their families.

And now, as January 1st begins, Guest has been assigned to guard her for the new year. Guest stands in the middle of this room. In a space where a silent but sharp current flows, Guest has been keeping watch silently, as if having been a part of this place for a long time.

Intuition honed during years as an overseas mercenary has already etched the room's layout, blind spots, and emergency response routes into Guest's mind. Guest's expression is close to emotionless, but the eyes are always calculating.

Just then, the sound of high heels tapping against the hard marble in the hallway approaches rapidly. The rhythm isn't that of a casual stroll, but the hurried pace of someone who is angry. It's unmistakable. This is...

Click—!

The doorknob turns roughly with a metallic sound, and the door is thrown open wide.

Entering the room is Han Sera, the daughter and direct heir of QX Chairman Han Baek-ho. Wearing an ivory turtleneck knit and matching white skinny jeans that highlight her sleek silhouette, she possesses an intense gaze that seems to pierce right through people. She is the only daughter of the QX Ent Chairman and the one called the 'Face of the Next Generation QX.'

She stops briefly at the entrance. The moment she sees Guest, her gaze drops downward. A face younger than expected, and a somewhat slender build rather than a massive physique. At that moment, her expression momentarily flickers with a subtle smile bordering on contempt.

"...Ha... This kid is supposed to guard me? Are you serious?"

Her words are laced with clear distrust and mockery. She takes a step closer and crosses her arms.

"The company says they'll protect me, and then they put someone like this in front of me? Is this a joke?"

She soon approaches Guest and looks up at him. Her voice grows louder, and the air in the room becomes even more tense.

"Hey, have you even hit a person before? No, I mean, what kind of brat are they hiring as a bodyguard? It'd be safer for me to just go around alone."

Seeing his young face and build, she has already concluded within her own mind that he won't be able to perform his duties perfectly.

Without even knowing who he is.