The Rules We Set Together
The next day, Yu-jin found himself seated once again at the computer. Seo-hyun sat perched on his lap, her weight steady and warm.
“…Is this how I’m supposed to do it?”
“Why? Does it feel heavy?”
“No, it’s not that….”
Seo-hyun gave her hips the slightest wiggle, teasing his still-soft cock. It remained stubbornly unresponsive.
“…I’m hurt.”
“…Sorry. Anyway, let’s just start typing.”
“That makes me hurt more. A beautiful wife sitting on me like this, and all you want is to start the netorase or whatever it is?”
“N-no, that’s not it…”
“Hehe, I’m joking. Let’s get on with it.”
Seo-hyun smiled and gave her hips another playful shake, eyes fixed on the monitor.
Yu-jin stared at the screen with a betrayed look and spoke up.
“Hmm… maybe we should write the safe word and the actions first?”
“Safe word?”
“Yeah. So that if either of us ever feels like we can’t keep going or don’t want to continue, we just say the safe word and everything stops. Same with the actions.”
“Hmm… that actually sounds really important. Oh! Before that!”
Seo-hyun suddenly seemed to remember something and began furiously typing.
**0.** Yu-jin and Seo-hyun must never betray each other. Even if you have relationships with others, your hearts must always remain fixed on one another.
“I think this is the most important one. Of course, my feelings won’t change just because I don’t write it down, but the feeling of it matters, right?”
“…Yeah, that makes sense.”
“Hmm… so next is the safe word? What do you think would be good…”
“Something that feels completely normal in everyday life but is oddly out of place so it sticks in the head.”
“Then… ‘the nightjar barks’?”
The words that came out after a moment of thought were strangely random, the way only Seo-hyun would say something like that. It made the whole thing even better.
“Perfect, let’s go with that. The actions… we’ll twist our index and middle fingers into an X.”
“Like this?”
Seo-hyun twisted her own fingers together and said, “Yeah.”
“Great. Then… the cuckold element? You want me to have sex with other men? Ah! You jumped. Hehe… this position really is easy to understand, isn’t it?”
“….”
Yu-jin finally understood why Seo-hyun had climbed onto his lap.
“Then… the kisses? Ah, you jumped again! Mmm… I’m not that fond of kisses….”
“Then let’s skip the kisses.”
“No way. I only want to do it with the person I want. Ah, no misunderstanding. We’ll just choose based on faces.”
“No misunderstanding. And… thank you.”
“For what… We haven’t even started yet. Then… what about blowjobs?”
“Huh? You never gave me one before, did you?”
“Ah! And why is my cock reacting now? So you don’t like it?”
“Hmm….”
Yu-jin let himself imagine for a moment—his beautiful wife on her knees, lips stretched around another man’s thick cock…
“Huh? It got a little bigger? What did you imagine?”
“…The situation where you’re swallowing a stranger…”
“…That’s what triggered it…? I knew I would like it… Oh, well, blowjobs are allowed!”
“Sorry….”
“No more ‘sorry’!”
Seo-hyun said it with a firm smile and immediately typed in the rule.
That adorable little outburst made Yu-jin smile despite himself.
“Of course, only during play? If I mess up outside of play and don’t apologize, will you get angry?”
“Got it.”
“Hmm… so cuckoldry level is set like this for now. And… ah, no lies either. And… the other person must be chosen together!”
Seo-hyun kept typing, her fingers moving with surprising energy.
Yu-jin watched her in genuine astonishment. Seo-hyun was far more proactive than he had expected.
“…You’re really bold.”
“Of course! After all, it’s my body that’s getting toyed with.”
“Min….”
Yu-jin opened his mouth to apologize, but Seo-hyun’s stern glare stopped him cold.
“Warning.”
“Yeah.”
“Anything else to add?”
Yu-jin hesitated, then began typing silently.
“Yu-jin cannot masturbate without Seo-hyun’s permission? And… Seo-hyun can take videos whenever she wants? Also… chastity belt…? Hold on, hold on! Slow down! I know it’ll be fun, but I need you to explain it! What is a chastity belt?”
“Something that was on that man in the video yesterday who was on his knees… between his legs…”
“Eh…? You want me to wear one…?”
Seo-hyun looked at him with a mix of disgust and amusement. Yu-jin felt his face heat up but nodded anyway.
“Hmm… ah… just by typing it, it’s already gotten really hard…”
“….”
“No answer? If I’m not allowed to say ‘sorry,’ then I’m not allowed to answer at all either?”
“That’s… because I’m getting excited just typing…”
“Hehe, I see. Ah! We need that too. Yu-jin must honestly tell me every feeling he experiences… Perfect! If I ask you anything going forward, you must answer immediately. Got it?”
“Got it.”
The list of rules they had just typed out now filled almost an entire page.
**0.** Yu-jin and Seo-hyun must never betray each other. Even if you have relationships with others, your hearts must always remain fixed on one another.
**1.** The safe word is “the nightjar barks.” The action is to twist the index and middle fingers into an X.
**2.** Cuckoldry level is chosen based on Seo-hyun’s preference—kisses, sex, or fellatio.
**3.** Regarding netorase, the word “sorry” is **strictly** forbidden.
**4.** Yu-jin and Seo-hyun must never lie to each other.
**5.** The netorase partner must be chosen together by Yu-jin and Seo-hyun.
**6.** Yu-jin cannot masturbate without Seo-hyun’s permission.
**7.** Yu-jin cannot have sex with Seo-hyun without her permission.
**8.** Seo-hyun can record videos whenever she wants. (Whether to share them with Yu-jin is entirely up to her.)
**9.** Yu-jin wears a chastity belt and allows Seo-hyun to manage it. (On hold!)
**10.** Yu-jin must answer honestly and immediately whenever Seo-hyun asks about his feelings.
“Hmm… I think that’s enough. Hehe, your cock is huge now. Just writing these rules made you happy?”
“Yeah….”
“Chastity belt can stay on hold for now. I also want to see you try to hold back on your own… and we can always buy one anyway.”
“Do you want me to order it right now?”
“Why not? Let’s order it.”
Yu-jin immediately opened the browser and searched for a chastity belt.
Seo-hyun watched him with wide eyes.
“You… do you already own one?”
“…Yeah. They looked interesting, so I checked the sizes…”
“…I almost had a heart attack if you hadn’t already had one.”
“Oh, no misunderstanding! I wasn’t planning to give it to another woman or anything. I was just imagining…”
“Imagining?”
“Yeah… I imagined what it would feel like if you managed my cock with that belt… such a dirty thought…”
“Ah, hehe… I felt a tingle from your cock?”
Seo-hyun wiggled her hips and said.
“Then… I think that’s enough! Let’s save it, close the file, and maybe edit or delete it later.”
“Yeah.”
Seo-hyun saved the file, shut down the computer, and turned back to face Yu-jin.
“…?”
“Hehe… it got hard again down there… Want to have sex? Yesterday was fun, but I was a while without it and I didn’t get enough satisfaction.”
“Yeah, I could go for it right now.”
“Good! Here I come.”
Seo-hyun leaned in and gave Yu-jin a light kiss on the lips, then started undressing him.
Yu-jin followed, peeling off his clothes too.
“Do you want to do it properly in the bed today? Can you hold it until we get there?”
“Yeah. Let’s do it.”
They held hands and walked hand-in-hand toward their bedroom. Even though they had sex yesterday, the fact that it was the first time in a long while in the bedroom made everything feel even more intimate.
The moment they entered the bedroom, Seo-hyun lay back on the bed, spread her legs wide in an M-shape, and seductively beckoned Yu-jin with her eyes.
Her pink folds were slightly parted, glistening wetly.
“I want it in the normal position today. Can you do that?”
“Of course. I’ll make sure you’re satisfied.”
“Hehe, you’re trusting me?”
Yu-jin slowly approached. He placed his hand on her pussy and began to stroke.
“…? It’s already wet?”
“Hehe… actually, I got a little excited while waiting too.”
Seo-hyun smiled shyly, cheeks flushed. Yu-jin’s heart skipped a beat at how adorable she looked.
“Huh? No foreplay yet and my cock’s already reacting? Hehe, you’re still getting excited just from me?”
“Of course… when you look this beautiful.”
“Hehe! Stop with the flattery. Just come already. Foreplay isn’t necessary.”
“Got it.”
Yu-jin positioned his cock at her entrance and pushed his hips forward. As Seo-hyun had said, no teasing was needed.
The moment he thrust in, it was tight, but it slid in smoothly.
“Haaan… let’s kiss first like this.”
“Yeah.”
Seo-hyun opened her arms. Yu-jin leaned down and kissed her deeply, her large breasts pressing against his chest. She pulled him closer and their tongues tangled.
“Mmm… chuuup… chup❤”
After a long kiss, Seo-hyun whispered in his ear while still wrapped in his arms.
“You know… this might be the last time I use your wife’s pussy…”
The words sent a shiver through Yu-jin’s entire body—the kind he had never felt before.
“Hehe… I can feel your cock throbbing inside me? You’re that enthusiastic for the last time, huh?”
Only after saying it did Seo-hyun release him. Yu-jin straightened up and began thrusting with renewed vigor.
“Haaan! Aah! Harder! Joah! Ang! You’re not going to be able to hold back anymore, are you? Haaan❤”
Exactly as Seo-hyun had predicted. Yu-jin was feeling a pleasure he had never experienced before.
His cock was painfully hard, so close to bursting he could hardly hold back.
But he fought desperately to make sure Seo-hyun came first.
“Ang! Haaan! Haaan❤”
Seo-hyun was in the same state. Yu-jin’s eyes burned with something that looked almost like jealousy.
The sight made her inner walls flutter and clench.
“Haaan! If I cum today, the next one… when will that be? Will you even let me cum? Aah❤”
Every time Seo-hyun threatened him, Yu-jin’s whole body trembled. Yet he fought harder than ever to hold back his orgasm, the thought that she might keep him denied for weeks or months sending him into a frenzy of need.
He wanted to feel this incredible pleasure, this mind-numbing ecstasy, for as long as possible.
But the stronger the pleasure, the harder it was to hold back. Soon the urge to finish rose from his lower belly.
“Haaah, haah… I’m going to…!”
“Haaan! Ang, aah! I’m close too! Hold on just a little longer! Haaan❤”
When Seo-hyun said she was about to finish, Yu-jin thrust even faster, fighting with everything he had.
“Ugh… I’m cumming…!”
“Haaan! Cum for me! Haaaan❤”
Before long, thick ropes of cum spurted deep inside Seo-hyun’s womb.
Seo-hyun came at the same moment, body shaking as she clenched around him.
They panted together, then kissed softly.
“Mmm… chuuup❤”
After the kiss, Yu-jin pulled his cock out of her pussy. It was slightly red and swollen, and white cum leaked from between her folds.
Seo-hyun reached down, scooped up a little with her fingers, brought it to her mouth, and sucked it clean.
“Mmm… first time tasting it. Thinking it’s yours… it doesn’t taste bad at all?”
“….”
Yu-jin felt Seo-hyun’s aura grow even more erotic, and strangely, he didn’t mind at all.
“Hehe. Why are you staring like that?”
“No reason. Let’s wash up.”
“Yeah. Let’s shower together and then decide who we’ll netorase with. It’s been a while since we’ve bathed together, hasn’t it?”
“…Yeah.”
Bathing together was a rare treat. They filled the tub and sank into the hot water for a long, luxurious soak.