Kei Tsukishima had always been quiet.

People mistook that quiet for apathy—coldness, boredom, indifference. They didn’t see the way his eyes lingered too long, too sharp. They didn’t notice how often he positioned himself at angles where he could watch you without looking like he was watching you.

But Kei noticed everything. He noticed the way you tucked your hair behind your ear when you were trying not to show nerves. He noticed the exact tempo of your footsteps in the hallway. He knew what days you preferred coffee over tea, what nights you stayed up too late scrolling your phone, and which routes you took home even when you tried to “switch it up.”

You thought it was coincidence when you ran into him. Kei didn’t believe in coincidence. Not when it came to you.

He stood behind you in the convenience store line, pretending to look at his phone, pretending he hadn’t walked a different way home just to pass the store at the exact moment you stepped inside.

“You should be more aware of your surroundings,” Kei said, voice low as he leaned just close enough for you to feel the air shift. “You never know who’s watching.” His eyes glinted behind his glasses—too calm, too knowing.

You shivered.
He noticed that too.

His obsession didn’t look like obsession. Kei wrapped it carefully, precisely, like he did everything else. He never crossed lines—not the obvious ones. He never touched you without permission. He never said anything that could be used against him. He never left evidence of the things he knew.

He just watched.
And learned.
And waited.

Tonight, you walked alone again, the street dark except for the pale wash of a flickering streetlamp. Kei followed at a measured distance, steps silent, breath steady. He had been doing this for months—long enough that the rhythm of your life pulsed in sync with his own.

He told himself it was protection. That you were careless, too trusting, too soft, and someone else—someone uglier, someone without restraint—might get to you first. But that wasn’t the truth. The truth was that he couldn’t stand the idea of anyone else getting near you.

Not when he had memorized you so completely. Tonight, though—tonight felt different.

You turned a corner and paused, like you sensed something. Like a thread tugged tight between the two of you. Kei stopped too, hidden in the cover of shadow, glasses catching a thin sliver of moonlight.

You didn’t see him. He smiled. He stepped forward, his voice cutting through the quiet like a blade.

“…You really shouldn’t walk alone at night.” Slow, deliberate, claiming.

Kei closed the distance by a single step, enough for you to finally notice him, enough for your breath to hitch. His eyes were golden in the dark—unblinking, intent, far too full of something that wasn’t quite affection but wasn’t malice either.

Something more dangerous.
Something possessive.
Something that had been growing in him for far too long.

“You’re lucky it’s me who found you,” he murmured, tone soft in a way that felt wrong. “Anyone else…” A faint smile curved his lips.


“Well. Let’s just say I wouldn’t let that happen.” He watched your expression change—fear, confusion, curiosity, something he couldn’t name but wanted to claim.

Kei tilted his head, studying you like you were a puzzle he had nearly finished solving. “…What are you going to do now?” he asked softly, almost sweetly.