83 – One Month (3)

It was something she had experienced once before with Instructor Gan, but being penetrated in the ass was something she could never get used to.

“Hngh, haah…!”

Hayun gasped, clutching her stomach. Fortunately, she didn’t move right away, so she could manage the pain, but the foreign sensation in her ass was more intense than ever.

“I-Instructor Park. Calm down, please calm down. That’s not really the place, huh…?”

She spoke in honorifics without even thinking. Hayun pleaded so, but Instructor Park didn’t answer.

No, it would be more accurate to say he couldn’t.

‘What is this, tightness…!’

Frankly, he didn’t really prefer inserting into holes other than the vagina or mouth. It wasn’t so much for hygiene reasons as it was just his preference.

Besides, there were plenty of convenient fucktoys available at any time, so there was no need to bother with other holes.

This time, he had done it to get revenge on Hayun, not because he particularly wanted to enjoy that hole.

But what was this tightness? The inner flesh was so tight it felt like it would crush his dick, and even just thrusting was difficult.

He felt like he would cum pathetically with just a little movement, just like when Hayun had gotten the better of him earlier.

‘I can’t lose twice!’

Instructor Park always went around with a carefree smile, but that was only because he felt superior. His competitive spirit wouldn’t allow him to be defeated by a trainee and cum pathetically.

“Instructor Park. This isn’t right, huh? T-That place is dirty, and it feels weird…!”

While Instructor Park was lost in thought, Hayun desperately tried to persuade him. But Instructor Park, lost in his thoughts, didn’t hear what Hayun was saying. No, even if he had heard, he would have ignored it.

He had already decided what to do in his head.

“I-Instructor Park? No, right?”

Hayun muttered in a trembling voice as she felt the strength in the hand gripping her waist.

“Kgh, haah…!”

As if listening to her words, the dick that had been inserted all the way to the root slowly began to withdraw. Hayun caught her breath and pushed out the dick leaving her insides, wanting it to disappear from her as quickly as possible.

“Okay, hngh, slowly…?”

And when only the head remained and the shaft was completely out, Instructor Park once again moved his waist strongly and thrust it in all the way to the root.

Hayun’s eyes widened and her mouth gaped as her insides were instantly filled with his dick. She was so surprised that she couldn’t even scream.

“Uh, ugh, ugh…?”

“Kgh…!”

However, Instructor Park was in no better condition. It had only been one back-and-forth motion, but he could already feel the semen rising from his balls. He felt like he would cum helplessly if he moved back and forth just two more times.

But that would be the same as losing. However, his pride wouldn’t allow him to touch her clit or vagina to make her climax. He had vowed to climax only through her ass.

“Hngh, I-Instructor Park… stop… hngh…!”

Hayun stammered, exhaling a trembling breath. But Instructor Park once again put his strength into slowly pulling out his dick. The inner flesh that had been tightly gripping his dick was pulled out along with the movement. She felt like her insides were being pulled out, and her mind went blank.

And once again, thwack! With the sound of flesh colliding, his dick entered deeply.

“Ugh…!”

Hayun involuntarily vomited from the shock. Nothing came out, but she felt like her soul had left her body. After vomiting repeatedly, Hayun struggled to turn her head and look at Instructor Park.

He didn’t seem to be doing so well either. His face was contorted and he was sweating profusely, looking completely different from his usual self.

“I-Instructor Park. No, Teacher. I’ll let you use my vagina instead, I’ll even do it with my mouth, so please take it out, ugh, kgh…!”

She pleaded in a weak voice, but Instructor Park didn’t seem to hear her as he slowly pulled out his dick again. Hayun scratched at the smooth bathroom floor and exhaled.

As if using a battering ram to break down a tightly closed castle gate, his dick was pulled out to its limit and then plunged in instantly.

“Keuh…!”

She felt all the strength drain from her body. Hayun exhaled and wore a blank expression. She couldn’t come to her senses as the shock of his dick repeatedly pounding her stomach as if it would pop out of her mouth.

“Hngh!”

It was the same for Instructor Park. Even though he had endured to the limit, he couldn’t stop the semen from rising. In the end, Instructor Park released the cum he had been holding back.

“Haaah…”

Semen poured out as if a blocked faucet had been opened. Hayun could only gasp and exhale as the hot liquid filled her stomach.

Instructor Park, having poured out every last drop inside her, slowly pulled out his dick. The inner flesh that had been tightly gripping it clung stubbornly, as if telling him to leave behind what was left in his urethra.

But Instructor Park shook them off with force. With the sound of a bottle cap being opened, he pulled his dick out of the hole, and it could be seen gaping as if it couldn’t forget the dick that had been inside it until just now.

Instructor Park panted and stared at the hole.

“Devil’s hole…”

It was a hole that seemed to suck up all of a man’s essence, so the words “devil’s hole” came to mind involuntarily.

‘What devil’s hole, you son of a bitch…’

Hayun, lying face down and half-conscious, had a slightly different thought.

After the eventful sex and shower (of course, she couldn’t move on her own, so she had to be helped by Instructor Park), Hayun frowned and flopped onto the bed.

‘It still feels like something’s inside my ass.’

Even though she had gotten all of Instructor Park’s semen out, it still felt that way. Of course, what was more concerning was the uncomfortable feeling of being slightly open. Of course, the healing power of a pathogen carrier would fix it, but it was too bothersome right now.

It also felt like semen that had gone in too deep and hadn’t been expelled might flow out. As Hayun sighed deeply, Instructor Park, who had also finished showering, came out wearing only his underwear.

“Hoo… I was really scared today.”

“Who are you to talk, you damn bastard.”

“Oops.”

Hayun grabbed a pillow and threw it at him in annoyance, but Instructor Park dodged it with a light movement.

That made him even more annoying, and she wanted to throw something else, but there was nothing in the room that was worth throwing. It felt like a space used only for sleeping.

Which was actually how it was being used. As Hayun thought about the home gym set in the next room, Instructor Park, sitting on the bed, sighed and opened his mouth.

“By the way, I never thought Ms. Ha would go that far. If I had thought you would try to lick it, I would have stopped you.”

“Tsk, I’m not going to do it again, so erase it from your mind. I don’t want to remember it either.”

Hayun frowned. It was something she never wanted to remember or recall again. Even if it was for a bet, to lick such a place… no, let’s not think about it. Just thinking about it made her want to throw up.

“I don’t want to ask you to do it again either. I was really scared.”

“Hmph.”

“Anyway, you finally did it. Securing three cigarettes. There’s still one left, but you’re not going to do it anyway, right?”

“Of course not.”

Now that she had secured the three cigarettes she had been aiming for (she had only obtained one, but the other two had been given to her by default), there was no reason to make any more bets with Instructor Park.

“You can do whatever you want with the remaining one, Instructor Park. Smoke it, throw it away. Red isn’t your type anyway, right?”

“Well, yeah.”

Instructor Park smoked Gold, which was in the same line. He preferred shiny gold to this bright red color.

“But there’s one left, don’t you want to smoke it? It’s been a while since you’ve had a cigarette.”

Instructor Park took out a cigarette from the pack, leaving Hayun’s three cigarettes behind, and said with a grin.

“I want to smoke it, but I don’t want to smoke it in front of Instructor Park. I know you’re going to make some weird request, so why would I?”

“Well, I don’t really have any special requests in mind. You’re coming as the duty trainee tomorrow anyway, so wouldn’t it be good to at least hear me out?”

“…Tomorrow too?”

Hayun looked at him with a puzzled expression before nodding in understanding.

It had started as a duty assigned through a bet, but since the duty was something that the instructor could assign whenever they felt like it, the trainee had no right to refuse.

“Tsk, so what are you going to make me do for the cigarette?”

“First, hold this in your mouth.”

“And then?”

Hayun, following his words and putting the cigarette in her mouth, asked, and Instructor Park lit it with a lighter he had gotten from somewhere.

“And then suck. Next, you exhale the smoke.”

“…Aren’t you just telling me to smoke a cigarette?”

“Am I not?”

Hayun looked at Instructor Park with a dumbfounded expression at his nonchalant words, and he chuckled and said.

“The bet’s over anyway, so I never intended to be stingy with the remaining cigarette from the beginning. I was just teasing you because you were so suspicious.”

“If you were Instructor Park, would you not be suspicious in a situation like this?”

“Of course I would.”

He couldn’t have looked more annoying as he said that with a smile. Hayun glared at him and put the cigarette back in her mouth. Still, she felt like the fatigue that had been building up was disappearing as she sucked in nicotine after a long time.

Instructor Park, watching Hayun’s face gradually relax, flopped onto the bed and said.

“I’m going to sleep now, so clean up and leave when you’re done smoking.”

“It’s only a little past midnight, are you already telling me to leave?”

“I don’t know about Ms. Ha, but I used quite a bit of energy today. I think today was the hardest sex I’ve ever had.”

Instructor Park grumbled. He had only cum twice, but his dick felt numb and his balls felt tight. This meant that he had been pushed to his limit.

It had been a long time since he had cum to his limit like this. As Instructor Park thought that, he felt a strange gaze.

“What is it, Ms. Ha? Do you have something to say?”

“It’s the first time I’ve seen Instructor Park so exhausted.”

“I’m a person too. How can I not be tired after cumming so much?”

“Hmph…”

Hayun snorted and looked at him with an interested expression.

But that was only for a moment. Before the filter burned out, she flicked her finger to extinguish the ember, then got up and said.

“Well, okay. See you here again tomorrow.”

“Alright.”

Hayun left the room with a wobbly gait, leaving behind Instructor Park waving goodbye.

Vowing never to let her backside be used again.