Yandere BTS Oneshots.

The Darkness Within || KNJ

Y/n's life had changed dramatically since her parents entrusted her and her younger brother, Jihoon, to Namjoon. Their parents, frequently abroad for work, believed they were securing the best education for their children by hiring Namjoon, a highly regarded tutor with an impeccable reputation. However, beneath Namjoon's polished exterior lay a sinister darkness that no one could have anticipated.

Jihoon, Y/n's little brother, was a sweet, gentle boy with autism. He thrived on routine and the comfort of Y/n's presence. Y/n had always been his protector, ensuring he felt safe and loved. The siblings shared a bond that transcended words, their silent understanding more profound than any spoken language.

Namjoon's arrival seemed like a blessing at first. He was meticulous, intelligent, and appeared genuinely invested in their academic success. But as the days turned into weeks, a creeping unease settled over Y/n. Namjoon's stern demeanor shifted towards something far more menacing.

At first, it was the small things—harsh words, unreasonable demands, and extended study hours that left Y/n exhausted. Namjoon would berate her for the smallest mistakes, his eyes cold and unforgiving. Jihoon, sensitive to the changes, became increasingly anxious, clinging to Y/n whenever he could.

One evening, after a particularly grueling study session, Namjoon demanded Y/n stay behind while Jihoon was sent to his room. "You need to focus more, Y/n," Namjoon said, his voice unnervingly calm. "Your performance is unacceptable."

"I'm trying my best," Y/n replied, her voice trembling. "Please, I need to check on Jihoon."

Namjoon's expression hardened. "You're not leaving until I'm satisfied," he said, his grip tightening around her wrist.

The real nightmare began one night after dinner. Jihoon was playing quietly in the living room while Y/n cleaned up the kitchen. Namjoon's voice cut through the silence, summoning Y/n to his study. She obeyed, her heart pounding in her chest.

Namjoon sat behind his desk, his eyes cold and calculating. "Y/n, you've been very disappointing lately," he said, standing up and moving towards her. "You need to be punished for your failures."

Y/n's blood ran cold. "Please, Namjoon. I'll try harder. Just don't—"

Her plea was cut short as Namjoon grabbed her arm and dragged her to the living room. Jihoon looked up, sensing the tension, his eyes wide with fear.

"Sit," Namjoon commanded, pushing Y/n onto a chair. He turned to Jihoon, who was visibly distressed. "Watch," he ordered the boy. "Your sister needs to learn her lesson."

Jihoon whimpered, rocking back and forth, but Namjoon's cold gaze kept him frozen in place. Y/n's heart broke seeing her brother so scared, but she was powerless to stop what was coming.

Namjoon produced a thin, flexible rod and struck Y/n across the back. She cried out in pain, her body jolting with each blow. Jihoon's cries echoed in the room, a haunting chorus to Y/n's suffering.

"Stop! Please, stop!" Y/n begged, tears streaming down her face. But Namjoon was relentless. He struck her again and again, his face twisted with a perverse satisfaction.

When he finally stopped, Y/n was left trembling, her back a canvas of welts and bruises. Namjoon wasn't done, though. He forced her to kneel, her knees scraping against the rough carpet.

"You will learn to obey," he hissed, holding a candle dangerously close to her skin. The heat was unbearable, and Y/n screamed as he pressed it against her arm, the smell of burning flesh filling the air.

Jihoon's sobs grew louder, but Namjoon ignored him. He seemed to take pleasure in Y/n's agony, a twisted smile playing on his lips.

After what felt like an eternity, Namjoon finally released her. He pushed her to the floor, his face a mask of feigned regret. "Now, now, Y/n. This hurts me more than it hurts you," he said, his voice dripping with false kindness.

Y/n lay on the floor, her body a throbbing mass of pain. Namjoon turned to Jihoon, his expression softening. "Come here, Jihoon," he said gently. "Your sister is fine. She just needed to learn a lesson."

Jihoon, terrified and confused, crawled towards Y/n, his small hands trembling as he touched her face. "Y/n, are you okay?" he whispered, his voice broken.

Y/n forced a smile, wincing at the pain. "I'm okay, Jihoon. I'm okay," she lied, pulling him into a weak embrace.

Namjoon watched them for a moment before crouching down beside Y/n. "I'm sorry it had to be this way," he said, his tone nauseatingly sincere. "But you must understand the importance of discipline."

He reached out, stroking her hair with a mock tenderness. "I'll take care of you now. Both of you."

Y/n's stomach churned at his touch, but she was too weak to resist. She closed her eyes, focusing on Jihoon's warmth, drawing strength from her love for him.

In the days that followed, Namjoon maintained his facade of kindness, tending to Y/n's wounds with gentle hands and whispering hollow apologies. He brought her favorite foods, read to Jihoon, and tried to weave himself into their lives as a caring guardian.

But the darkness within him was always there, lurking beneath the surface. Y/n knew that any defiance, any sign of disobedience, would bring out the monster again.

Despite the pain and fear, Y/n's spirit remained unbroken. She knew she had to protect Jihoon from Namjoon's wrath. She had to find a way to escape this nightmare.

She began to observe Namjoon closely, noting his routines, his habits, looking for any weakness she could exploit. She pretended to accept his authority, playing the part of the obedient student, all the while planning their escape.

Every night, she whispered to Jihoon, comforting him, reassuring him that they would be free someday. Jihoon, in his innocence, believed her, drawing strength from her unwavering determination.

Months passed, and Y/n's wounds healed, but the scars remained, both on her body and in her heart. She continued to gather information, waiting for the perfect moment to strike.

Finally, the opportunity came. Namjoon announced he would be away for a few hours, leaving them alone in the house. It was a rare chance, and Y/n knew they had to seize it.

As soon as Namjoon left, Y/n hurried to Jihoon's room. "Jihoon, we're leaving," she whispered urgently. "We have to go now."

Jihoon, sensing the seriousness in her voice, nodded and grabbed his favorite toy. Y/n packed a small bag with essentials, and together they slipped out of the house, their hearts pounding with fear and hope.

They moved quickly, sticking to the shadows, avoiding any familiar routes. Y/n's mind raced with possibilities, but she knew they had to reach somewhere safe. She decided to head to a nearby shelter she had researched, hoping they would find refuge there.

After what felt like an eternity, they arrived at the shelter. Y/n explained their situation to the staff, who immediately took them in, providing a safe haven from Namjoon's reach.

For the first time in months, Y/n and Jihoon slept peacefully, free from the oppressive presence of their psychotic tutor.

The authorities were contacted, and an investigation into Namjoon's actions was launched. Y/n and Jihoon were placed under protective custody, ensuring their safety while the legal process unfolded.

Namjoon's dark secrets were exposed, his reputation shattered. He was arrested and faced charges for his heinous acts, the full extent of his cruelty laid bare for the world to see.

Y/n and Jihoon began the long journey of healing. The trauma they endured had left deep scars, but they were together, and that was all that mattered. With the support of kind-hearted people and the strength of their bond, they slowly rebuilt their lives.

Y/n vowed to protect Jihoon at all costs, ensuring he grew up in a world where love and kindness prevailed over darkness and fear. And as the days turned into months, the light in their lives began to shine brighter, pushing away the shadows that had once threatened to consume them.