The rest of the evening settled into a comfortably mundane pattern. After she shared a quick summary of her day-noting the calm, steady boundary she had maintained at the office-they made dinner together and relaxed on the sofa, watching a quiet movie as the city lights twinkled outside the floor-to-ceiling windows.

Around ten o'clock, Jungkook stood up, turned off the main living room lights, and guided her toward the master bedroom. The familiar, comforting weight of routine was everywhere, yet there was a subtle, focused shift in his dark eyes that hinted he had something specific on his mind.

She changed into a simple, comfortable silk nightgown and sat on the edge of the mattress, brushing her hair. Jungkook walked over from his closet, holding a sleek black leather case in his hand. He set it down on the nightstand and took a seat beside her, wrapping one broad arm around her waist to draw her against his side.

"Sir?" she asked softly, leaning her head onto his shoulder. "What's in the case?"

Jungkook smoothed his hand up and down her arm, his thumb tracing slow, thoughtful circles against her skin.

"I was reading through some material recently," he began, his deep voice carrying a calm, intriguing tone. "Looking at different ways to expand our dynamic and deepen that feeling of complete surrender for you."

She looked up at him, her curiosity piqued by the quiet intensity in his voice.

"I want to introduce a new variation tonight," he continued, turning his head to look directly into her eyes. "A position of total restraint. I'm going to cuff both of your wrists to the upper corner posts of the headboard, and secure both of your ankles to the footposts."

Her breath hitched slightly, a tiny thrill of anticipation catching in her throat. "Fully spread out?"

"Fully spread out," Jungkook confirmed smoothly. "No room to shift, no room to adjust. You will be completely immobilized, open, and utterly reliant on me."

He raised a hand to gently cup her jaw, his thumb brushing over her lower lip.

"And here is the twist for tonight," he added, his dark eyes sparkling with a subtle, commanding authority. "I'm not going to do anything to you right away. No spanking, no intense play. I am simply going to secure you in that position, and you are going to stay right there for a long time-until I decide what comes next. I want you to sit in that feeling of total vulnerability, letting your mind completely let go of control while I hold space for you."

He leaned down, pressing a lingering, warm kiss to her forehead.

"How does that sound, sweetheart?" he asked, checking in with that quiet, unshakeable care that made her feel infinitely safe.

She took a slow, deep breath, looking at the black case on the nightstand, then back into his steady, dark gaze. The thought of being completely bound-hands and feet pinned to the heavy wooden frame, left entirely at his mercy for hours-sent a wave of deep, intoxicating surrender through her entire body.

"It sounds wonderful, Sir," she whispered, her hands resting over his chest. "I'm ready."

Jungkook's lips curved into a dark, approving smile. "Good girl. Get on the bed."

He opened the sleek black leather case, revealing plush padded cuffs linked to high-strength leather restraints. Moving with methodical, deliberate grace, he instructed her to lie back against the propped-up leather pillows, placing her in a half-sitting, half-lying position.

"Hands up, sweetheart," he commanded softly.

She lifted her arms above her head. Jungkook took her right wrist, wrapping the soft leather cuff around her skin before clipping the steel carabiner securely to the upper right post of the dark wooden bedframe. The metallic click echoed sharply in the quiet room. He repeated the process with her left wrist, pulling it to the opposite post. Her arms were stretched upward and outward, pinning her upper body completely.

Next, he moved to the foot of the bed. He cupped her right ankle, wrapping the matching restraint around it and securing the strap to the bottom right bedpost. Finally, he secured her left ankle to the remaining post.

She was now completely spread-eagled across the wide mattress. Her wrists were anchored above her head, her legs pulled taut to the lower posts, and her torso propped up against the pillows. She couldn't shift her hips, pull her knees together, or adjust her upper body even an inch.

Jungkook walked slowly around the bed, inspecting every buckle and clip with absolute focus. He leaned over her, his broad chest hovering inches above hers, looking down into her wide, expectant eyes.

"You look beautiful like this," he murmured, his fingers tracing the curve of her jaw. "Completely open. Completely held."

He brushed a soft kiss over her lips, then smiled-a slow, enigmatic curve of his mouth that made a sudden flutter of anticipation spike in her chest.

"There is a twist to this tonight," Jungkook added, his voice dropping into a low, mysterious whisper. "But I'm not going to tell you what it is yet."

Before she could ask a single question, he pulled back, climbed onto his side of the bed, and sat back against his own set of pillows, picking up his tablet to read as if nothing unusual was happening.

Ten minutes passed in heavy, expectant silence.

Jungkook set his tablet down, reached over to the nightstand, and picked up the first clear, quarter-litre bottle of room-temperature water. Uncapping it, he turned to her, resting his forearm on her thigh.

"Drink," he ordered softly, bringing the rim of the bottle to her lips.

She tilted her head forward as best she could in her bound state, taking continuous gulps until the bottle was completely empty.

"Good girl," he murmured, setting the empty bottle on the floor.

Every fifteen minutes like clockwork, he reached for another quarter-litre bottle. Without a word, he held bottle after bottle to her mouth, tipping them until she drank every single drop. By the time the first hour had passed, she had already drained four full quarter-litre bottle-one full litre of water in just sixty minutes.

By the end of the second hour, after consuming eight quarter-litre bottles in rapid succession, her body was struggling to process the immense volume of two full litres of fluid. A fierce, relentless pressure bloomed deep in her lower abdomen. She shifted her eyes toward him, but Jungkook remained perfectly composed on his side of the bed, reaching for the ninth bottle right on schedule.

"Sir..." she choked out softly, her voice strained. "I... I really need to go to the bathroom."

Jungkook didn't pause. He brought the ninth bottle straight to her parted lips, his gaze calm, stern, and entirely unyielding. "Drink it all."

Bound by her submission, she forced herself to swallow the entire ninth quarter-litre bottle, feeling her stomach stretch and the pressure in her lower abdomen multiply instantly.

The next fifteen minutes were agonizing. The urge to relieve herself intensified tenfold, pulsing through her body like a physical fever. She began to squirm against the restraints, her thighs trembling as her muscles instinctively fought to press her knees together, but the leather straps kept her limbs pulled wide and helpless. Yet, true to her nature, she locked her jaw and kept her mouth shut, refusing to voice her distress again, trying desperately to endure the overwhelming restriction.

Fifteen minutes passed.

Jungkook picked up the tenth bottle.

He leaned over her, tipping the mouth of the bottle against her trembling lips. She drank, gulping down the fluid with desperate speed just to get it over with, her entire frame shaking from the intense, overwhelming fullness pushing against her waistline.

The moment the last drop passed her throat, a violent spasm wracked her pelvic muscles. She gasped, trying with all her strength to lock her body down, but the sheer weight of two and a half full litres of water was impossible to suppress.

A sudden, warm leak escaped her control-a small, helpless spurt of liquid soaking straight through her silk nightgown and blooming into a dark wet patch on the crisp white bedsheet beneath her hips.

Gasping in pure shock, instant, burning embarrassment flooded her face, turning her cheeks a deep, fiery red. Unable to hide her body or cover herself with her bound hands, she jerked her head sharply to the left, turning her face completely away from Jungkook, staring blindly at the dark wall as silent, burning tears of shame filled her eyes.