Bound by Devotion
Yandere Mark Lee x Reader
Summary: Mark Lee, once a sweet and caring friend, begins to reveal a dark obsession with you. His affection grows suffocating as he invades your privacy, tracks your movements, and isolates you from others.
Word Count: 1,060 words
Trigger Warnings
Obsession and stalking
Invasion of privacy
Psychological manipulation
Controlling behavior
Emotional and implied physical intimidation
Mark Lee was the definition of sweet and attentive. He always remembered the little things—your favorite coffee order, the songs you hummed absentmindedly, even the way you preferred your pens organized. At first, it was endearing. He made you feel special, like you were the center of his universe. But over time, his attention started to feel... different.
It began with the small things. Mark seemed to always know exactly where you were, even if you hadn’t told him. “Oh, you were at the library this morning, right?” he’d ask with that signature soft smile. When you questioned how he knew, he’d just laugh it off. “Lucky guess,” he’d say, but his eyes lingered on yours a beat too long.
Then came the texts—dozens of them throughout the day. What are you up to? Who are you with? When are you coming home? If you didn’t reply fast enough, his tone shifted ever so slightly: Are you ignoring me? Do you not care about me anymore? His messages were coated with sweetness, but you couldn’t ignore the underlying tension.
The breaking point came one evening after work. You were walking home when you noticed someone following you. Panic bubbled in your chest, but when you glanced over your shoulder, relief washed over you. It was Mark.
“Mark? What are you doing here?” you asked, clutching your bag.
His smile was soft, but there was a flicker of something unrecognizable in his eyes. “I just wanted to make sure you got home safely. You can never be too careful, you know?”
It seemed sweet—protective, even—until you realized he had no way of knowing your route home. You hadn’t told him.
“You didn’t have to—”
“Of course I did,” he interrupted, stepping closer. “I couldn’t forgive myself if something happened to you.”
---
The next morning, you found a note slipped under your door. The handwriting was neat and precise.
Stay away from him. You’re mine. ♥️
Your stomach dropped. Your mind raced to figure out who “him” was—your coworker? A friend? When you saw Mark later that day, he greeted you with his usual warm smile, but there was a possessiveness in his gaze that sent shivers down your spine.
“Is something wrong?” he asked, tilting his head.
“No,” you lied, hiding the note in your bag.
Mark’s expression softened. “Good. I don’t want you to worry about anything. I’ll take care of you.”
His words were comforting on the surface, but there was an unspoken weight to them. His grip on your shoulder lingered a moment too long.
---
Weeks passed, and Mark’s behavior grew more unsettling. You started noticing subtle changes in your environment. Your phone charger was unplugged when you hadn’t touched it. Items in your room were slightly out of place. And Mark always seemed to show up wherever you went, as though he’d memorized your schedule.
One evening, while scrolling through your phone, you noticed something chilling: your location sharing was turned on for Mark. You never remembered enabling it. Your heart pounded as you turned it off, but minutes later, a text from him popped up.
Why did you do that?
You froze.
A moment later, your phone rang. It was Mark. When you didn’t answer, he sent another text: We need to talk. I don’t like being ignored.
---
The confrontation came sooner than you expected. Mark showed up at your door that night, a bouquet of flowers in one hand and a soft smile on his face.
“I wanted to surprise you,” he said, stepping inside uninvited.
You tried to keep your voice steady. “Mark, this is too much. You’ve been... everywhere. I need some space.”
His smile faltered, and for the first time, his mask slipped. “Space?” he repeated, his voice low. “Why would you need space from me? Don’t you see how much I love you?”
You backed away, but he followed, closing the distance. “No one else can love you the way I do,” he said, his voice trembling with emotion. “They don’t deserve you. They don’t understand you like I do.”
“Mark, you’re scaring me,” you whispered, but he didn’t stop.
“I’m scaring you?” he asked, his tone shifting to something darker. “Do you know how scared I am? Scared that someone will take you away from me? Scared that you’ll leave me?” His hands gripped your shoulders, firm but not painful—yet.
You tried to pull away, but his grip tightened. “I’m not letting that happen,” he said, his voice softening into something almost tender. “I’ll protect you. Even if it means protecting you from yourself.”
---
As the days went on, you realized the depth of Mark’s obsession. He wasn’t just sweet or overprotective—he was watching, controlling, waiting. And no matter where you went, you couldn’t shake the feeling of his eyes on you.
There was no escaping Mark Lee’s love.
---
