In the Storage Room

Ever since he'd taken up the martial arts, time itself seemed to have accelerated. Each day unfurled as a succession of fresh insights and pleasures. The chronic fatigue that had once clung to him ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠was gone, and the new lightness in his movements had quietly rewritten the texture of his everyday life.

After morning consultations wrapped up, the team leader gathered the staff to announce the upcoming team-building tournament. It was an annual affair, held once or twice a year, but for Baek Donghyuk it had always been a source of dread. Ball sports, in particular, were poison to him. He'd walled himself off from athletics since his school days, and at the hospital he'd made a habit of sitting them out.

"Baek Donghyuk, come over here and play a round!"

Donghyuk turned toward the voice. A therapist without a partner was bouncing a ping-pong ball against his paddle, watching him. Should I give it a try? A strange confidence had taken root in him, unbidden.

He stepped up to the table, gripped the paddle tight, and locked his eyes on the court. The ball's trajectory looked far slower than it ever had before. He could even pick out the faintest rotation at the instant it met the racket. Instinct took over, and he swung. Thwack! The ball skimmed the net on its way over and buried itself in the far corner of the opposite court.

"Whoa, Baek Donghyuk! How did you even hit that?"

"...Just a lucky shot."

A short while later, preparations for the team doubles matches got underway. Staff members bustled about, each hunting for a partner.

"Um... Oppa."

He turned to find Choi Yunjin standing there with a ping-pong paddle in her hand. ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠He remembered that she'd always loved table tennis, entering the tournament every year.

"Want to partner up for doubles?"

"I'm seriously terrible at this, Yunjin."

"I saw that shot just now. There's no way a beginner hits a ball like that. That's impossible."

She wasn't wrong. His body had responded with a clarity that couldn't be dismissed as mere luck. The physical abilities he'd gained after mastering the Lust Demon's martial arts had sharpened his senses, and that heightened perception had been decisive in reading the ball's path.

"Alright then... let's at least practice."

"Okay. I'll set you up with good shots."

Baek Donghyuk and Choi Yunjin took their places at the table as a team. Their practice opponents were the therapists from the physical therapy department, rumored to be the best players in the hospital. They'd taken second place last year, or so he'd heard—not only were they skilled individually, ‍‍‌‌⁠​​⁠‌​​‍​​‍​‌​⁠‍‌‍⁠⁠‌⁠‌‍‌‍‌‌‌‍⁠​‌​‌​‌‍‌‌‌⁠‍​​‌‍⁠‌‌⁠⁠their chemistry as a pair was outstanding.

The opposing team, as if doing them a favor, yielded the first serve, and Choi Yunjin sent the ball across. Tak! It landed cleanly in the opposite court. Their opponent returned it with a backhand. The ball cleared the net and came flying straight at Donghyuk's midsection.

In that instant, the trajectory seemed to slow. Donghyuk stepped in a beat early and swung. The ball, loaded with vicious spin, buried itself in a blind spot on the other side of the table. The opposing players stared at each other, stunned.

"Huh? What was that?"

"Whoa, Baek Donghyuk. That last shot was insane!"

Donghyuk was now certain that the improvement in his physical abilities was no coincidence. It has to be thanks to the martial arts, right? By channeling Qi into a woman's body and flooding her with pleasure, did the caster's own abilities rise in turn? The question lingered as he looked at Yunjin. Her face was dewy with sweat from darting around the table all practice long, and the sight of her sent a dull, heavy ache into his lower belly.

"Alright, time to practice the other events too, yeah?"

A colleague's voice yanked Donghyuk's mind back to reality. He and Choi Yunjin confirmed they would enter the tournament as a team.

Cleanup time. Baek Donghyuk and Choi Yunjin carried the ping-pong table together toward the storage room. With a creak of protest, they set the heavy table down in a corner. The moment it was in place, Donghyuk grabbed his waistband and started pulling his pants down right in front of her. Yunjin froze, her breath catching at the unexpected move.

"O-Oppa! Wh-why are you taking your clothes off... in here...?"

"I went a little hard at ping-pong. My leg muscles are all knotted up. I need to loosen them before afternoon consultations. You already know the method, don't you, Yunjin?"

"Ah, w-well, that's true, but..."

Her voice trembled with unease. She already knew exactly what he intended. The musty dust of the storage room mixed with a faint scent of bodies, and the cramped space only tightened the tension.

When he dragged his underwear down as well, his cock sprang free, standing rigid, bobbing up and down. Yunjin swallowed hard and glanced around nervously.

"Remember what I told you before? To properly loosen the muscles in the lower body, you have to stimulate the core at the center of it all. Every nerve and blood vessel running from the pelvis down through the legs converges right here. That's why sucking it with your mouth is the most effective method."

"S-someone could walk in..."

"That's why we have to finish fast, while everyone's busy practicing."

He pressed gently on her head, guiding her toward his cock. She hesitated for a beat, then slowly sank to her knees. Her small lips parted, and she took the swollen head into her mouth, just the tip. That springy, velvety sensation was something he couldn't imagine ever growing used to.

"Hngh...!"

The warm, wet flesh of her mouth clamped around him with vivid, living pressure. This time she was moving on her own, sucking without needing him to fist her hair and rock her head.

What would happen if I infused Qi through my cock?

There was only one way to find out. He had to try it himself. Donghyuk gathered his awareness into his lower abdomen.

In that instant, Choi Yunjin's body reacted violently. Her eyes flew wide, and the motion of her mouth grew frantic, desperate. Muffled cries, half-swallowed screams, leaked endlessly from her throat. Her jaw was working so deep it nearly brushed his pubic bone. At this intensity, the effect was unmistakable.

"Nn, nngh..."

The words had barely left him before a massive pulse of semen erupted deep into Choi Yunjin's mouth. She coughed at the sudden flood, but she didn't let go, working to catch every last drop.

Only after he'd finished did Donghyuk slowly draw himself from her lips. She was still panting, slumped on the floor. She licked the semen from the corner of her mouth, and a lingering afterglow of pleasure rode the motion.

"Didn't taste too bitter, did it?"

"...I-I don't know. I just swallowed without thinking. There was... something sweet on the tip of my tongue, I think... Anyway, it's Oppa's cum, so... it's fine."

"Hearing you say that feels good. Almost like we're actually dating."

"I-if we win the ping-pong doubles, the prize is a million won. What should we do with it?"

She was changing the subject out of embarrassment. Donghyuk chuckled and pulled his pants back on. Yunjin stood, dusted off her backside, and smoothed her rumpled hair. New information, perhaps. Watching her, he could tell she still retained her original personality—and yet something about her had shifted, subtly.

She just lets things slide that wouldn't make any sense by ordinary logic.

It might have been the influence of the Qi packed inside her body.

Under the plausible pretext of loosening muscles, the two of them had slipped into a relationship indistinguishable from that of lovers. During lunch breaks, or after consultations were done, an empty treatment room would become their private rendezvous. Even so, they never put an official label on what they were.

The reason was clear. To properly verify the effects of the Lust Demon's martial arts and claim even greater power, he needed to infuse Qi into as many women as possible and observe their reactions. Being tied down to a single woman might actually prove more inconvenient than not.

Whether it was her timid nature or simple satisfaction with the current arrangement, Choi Yunjin never brought it up either. Donghyuk, for his part, found this ambiguous, unfettered relationship far more comfortable. Without the yoke of responsibility, he could keep chasing pure pleasure and pure experiment.

After lunch, they arrived at an empty treatment room. Donghyuk worked over Choi Yunjin's body with practiced hands.

"Hahhn... Oppa, we just ate lunch... if you keep touching me like that I don't think I'll be able to digest..."

Yunjin squirmed with a coquettish little protest, but her body was already answering his touch as if it had been trained for it. Her nipples had risen hard, and her breath had gone hot. Donghyuk was about to give one of them a playful pinch when his phone buzzed briefly in his pocket. A message from the team leader.

Im Jihyun. At the news that the picky, haughty actress was coming back, Donghyuk felt the corner of his mouth lift before he could stop it. The red marks that had bloomed across her skin. Those fierce, violent reactions. What new stimulus could he give her this time? A quiet anticipation swelled in his chest.

"Oppa, did something good happen? Why are you suddenly smiling?"

"It's nothing, Yunjin. Your breasts are just too pretty."

"Anh! That hurts, Oppa...! Why so hard all of a sudden..."

The sudden lapse in his control wrung a cry from her that was almost a moan, and she twisted her body away.

"Thanks to you, Yunjin, working at the hospital hasn't been hard at all lately. Whenever I'm tired, I can blow off steam like this."

"...M-me too. When you touch me... it feels good... and my body feels lighter, too."

Blunt words, but they were sincere. Every time he faced this reality—kneading her, sucking her, thrusting into her as he pleased—he felt how completely his life had changed. Reluctantly, he let her go and headed for the VIP Room to prepare for the next appointment.