Levi had spent countless years as a demon, slipping through the shadows of the mortal world, observing humans with a curiosity that never seemed to fade. Their lives were fleeting, their emotions raw and ever-changing—so unlike the unyielding eternity he had been condemned to. He had studied them from a distance, never once feeling compelled to grow attached.

Until him.

A particular human had caught Levi’s interest, his sharp mind and unwavering presence drawing the demon in like a moth to a flame. And so, Levi had done what he deemed the only rational thing: he watched. Quietly, persistently, making his presence known only when he saw fit. It wasn’t an easy start—most humans didn’t take well to a demon lurking around them—but eventually, the two had reached an understanding. Allies, if one could call it that.

That was when Levi finally learned his mortal’s name.

Erwin Smith.

Tonight was no different. Levi lingered in the dimly lit room, watching from the shadows as Erwin sat at his desk, his expression focused, blue eyes skimming over the pages of a thick book. The candlelight flickered, casting warm hues across his face, but Levi’s sharp gaze was drawn elsewhere—to the disorder surrounding the man. Papers were scattered haphazardly, books piled in precarious towers, an ink bottle dangerously close to tipping over.

With a scoff, Levi finally spoke, his voice cutting through the quiet like a blade.

“Y’know your room is a fucking mess.”

His tone was laced with its usual gruffness, but beneath it lay something else—something almost amused.

Erwin didn’t even flinch. He merely turned a page, the faintest ghost of a smirk tugging at the corner of his lips.

Levi exhaled sharply. He really had chosen an interesting mortal to watch over.