Chapter Index

    After receiving Da-mi Lee’s suggestive selfie, I worked out really hard for the first time in a while.

    It was a day where I didn’t have much else to do anyway, so I planned to exhaust my body with exercise and fall asleep early.

    Of course, my dojo doesn’t have as many different exercise machines as a gym, but it’s very easy to overwork my body.

    Because even just doing proper cardio on the treadmill will make me exhausted before long.

    “Huff… Hah, huff…!”

    That’s what I thought, but it wasn’t as easy as I expected.

    “Damn it, why aren’t I getting tired!”

    I had been using the point treadmill consistently, but I hadn’t been working out hard enough to feel the effects, even based on my previous fitness level.

    But now, as I ran with the intention of exhausting myself, I didn’t get tired enough that I could have challenged a marathon runner.

    Even though I was running much faster than Ha-yuna.

    Eventually, I stopped running and got off the treadmill.

    “This won’t work. If I run this hard, I’ll become a real stamina monster later on. I shouldn’t run on the treadmill anymore.”

    It’s not bad to be in good shape, but being too excessive didn’t seem like a good thing either.

    I had been using point exercise equipment for a while because of its crazy efficiency, but now I was letting go of it because of that crazy efficiency.

    I stopped using the treadmill and instead used the burpee test to exhaust my stamina. Because it’s high-intensity interval training, there’s nothing better for overworking the body.

    “Hoo…! Heok… crazy… how many sets did I do, damn… huh…”

    But even that took quite a while. Even though it’s an exercise that makes your whole body tired with just a little bit.

    Still, I managed to sweat it out in one cool session, and as I sat down to rest in the dojo for a moment.

    “Hoo, hoo… even if I quit running, I have to do this.”

    I put the Kegel exercise device I bought with points between my thighs.

    To be honest, there were a few days when I neglected exercise a little while focusing on dojo work, but I never missed this Kegel exercise.

    Because the memory of Da-mi being impressed and happy with me for keeping my penis erect all night long without getting tired boosted my self-esteem endlessly.

    That was without even using this exercise device, so now I’ll be able to erect my penis even more confidently. With inexhaustible stamina.

    And I heard that doing a lot of Kegel exercises also improves ejaculation ability. It was an essential exercise for the members who wanted my semen nutritional supplements.

    Besides.

    “Ye-na… huh…! I haven’t seen her limits yet…!”

    Gu-miho Ye-na, whom I saw during the ultra-realistic role-playing the other day, still had no discernible limit to her sex stamina.

    I’m going to mix bodies with Ye-na intensely later on, and it would be embarrassing if my penis got tired before Ye-na did.

    It’s okay to do Kegel exercises to an excessive degree.

    Of course, first of all.

    “Store manager, seriously… huff! Hoo… makes people so horny… huh!”

    I have to make our store manager, who sent me a selfie with her breasts exposed, happy first.

    ***

    Wednesday.

    It’s the first day since I changed to a self-defense dojo that I have two officially booked sessions.

    Da-mi Lee in the morning, and Ha-yuna, who will come around 3 p.m. in the afternoon.

    I went to bed early last night and woke up early this morning to finish my preparations.

    “I don’t know exactly when she’s coming in the morning, so I’ll just go early and kill time.”

    I could send a reply to ask for the exact time, but the affair makes me feel uneasy.

    I guess she got a second phone to text me, but I was worried about sending a reply rashly, whether it was from a second phone or her original phone.

    So I decided to move quickly.

    “By now… the cafe must be opening soon. Let’s go.”

    If Da-mi came early, I expected it would be around the cafe’s opening time. So I left home at that time.

    And I stopped by the cafe on the first floor before going to the dojo.

    To ask Na-rae if Da-mi was there if she was there, and to get a cup of Americano to take upstairs.

    However, Da-mi’s car was not in the outside parking lot. So I thought she hadn’t arrived yet.

    Therefore, I didn’t bother to check inside the cafe through the glass window and opened the door.

    -Ting-a-ling!

    “Oh my?”

    “Huh?”

    But unexpectedly, it was Da-mi, not Na-rae, who greeted me at the cafe counter.

    She was standing in front of the counter POS machine with her arms crossed, her dark green hair hanging down.

    Seeing that she was wearing a similar shirt to the one in yesterday’s selfie, the large breasts and erect nipples in the photo kept flashing in my mind.

    As I stood blankly at the door thinking about that, Da-mi raised the corners of her lips and opened her mouth.

    “Seong-hyeon, you came early?”

    With those words, she moved from inside the bar to the pick-up area. She put her arm on it and rested her chin on one hand.

    -Tap, tap

    In that state, she beckoned me with her finger like last time.

    Receiving that call, I walked towards the pick-up area. And like her, I put my arm on the pick-up counter to support my upper body, and faced her with my body slightly bent.

    Da-mi’s beautiful face right in front of me, her eyes drawing seductive curves, her sharp nose, her red lips.

    Along with her good scent, it made my heart beat faster.

    “I wanted to see Da-mi, so I came early. You only said you’d come in the morning, so I didn’t know when you’d come.”

    “Hehe, why didn’t you ask?”

    “Is it okay to reply? I’m getting more careful about this…”

    “It’s okay. So that’s why you didn’t reply? I was a little disappointed yesterday without even knowing. I sent you ‘something good’…”

    As she spoke, Da-mi leaned her face a little closer.

    In response, I naturally leaned my body forward, forgetting that I was at the pick-up counter of an open cafe.

    -Peck…

    Then, for a very brief moment, Da-mi’s moist lips softly overlapped.

    “Haa… Seong-hyeon didn’t send me ‘something good’. I was so sad.”

    The married woman’s bird kiss, looking at me with seductive eyes and breathing hot breaths, set my body on fire.

    The way she playfully complained that she sent me a suggestive selfie but I didn’t send her one set my heart on fire.

    My penis was fully erect.

    “I’m sorry. Next time I receive ‘something good,’ I’ll be sure to repay you.”

    “Really? I’ll be looking forward to it.”

    “As much as you want.”

    “Kkuk-kkuk… Oh, by the way, that number from yesterday will be my number from now on, so save it. It’s a number just for me and Seong-hyeon♡”

    “Yes. I’ll save it right away.”

    “Hehe.”

    Da-mi’s bright smile in response to my answer was truly pretty. It was beautiful enough that it was hard to take my eyes off her.

    Da-mi was a special woman to me.

    Of course.

    She was the first woman I had sex with in my life, the only woman I mixed bodies with without the help of the dojo system, and a damn attractive woman who enjoyed the sense of transgression of having an affair behind her husband’s back.

    I felt something similar to the sense of transgression while doing role-playing with Jae-min and Ye-na, but that was an artificial situation setting derived from the power of the system.

    But the affair with Da-mi was 100% real documentary itself.

    Thanks to that, I couldn’t predict how the relationship would continue even an inch ahead.

    So a corner of my heart was incredibly uneasy, but that’s why it was more thrilling and exciting.

    It’s an attractive situation, but it’s a fantasy itself in reality, a love affair with a beautiful and seductive married woman.

    It couldn’t not be special.

    “Then shall we go up soon? I’ve come all prepared to exercise.”

    “Let’s go. I’ll do my best to help Da-mi with her exercise.”

    “Please do. Oh, by the way, why did you stop by the cafe?”

    “I came to check if Da-mi had arrived and to get a cup of coffee… Da-mi was there instead of Na-rae.”

    “Hehe, is that so? Did you hear that, Na-rae? Can you get Seong-hyeon an iced Americano?”

    “Huh?”

    Following her gaze as Da-mi suddenly turned her head and spoke, I followed her gaze.

    “Ye, ye-ye-ye, yenet! I, I’ll get it for you right away!”

    There was Na-rae, covering her face with both hands, but secretly looking at everything between her fingers, not knowing when she had come.

    At the sound of her name being called, she turned around behind Da-mi in a hurry and went inside the bar.

    And with her face flushed red, she stood in front of the coffee machine and made an Americano.

    ‘Hmm… Na-rae is cute too, after all. Should I recommend the dojo to her soon?’

    She usually talks cheerfully and lively like a puppy, but it was a very tasty reaction to see her show such an innocent appearance after learning about the relationship between me and Da-mi.

    So I was more curious about how she would pant when my penis was inserted.

    I was unknowingly looking at Na-rae for a moment thinking that.

    Thanks to that, I didn’t notice.

    “Hee-eung~?”

    Da-mi was watching my appearance with the corners of her mouth raised, as if she found it interesting.

    ***

    I went up to the dojo with Da-mi, holding an Americano in one hand.

    The moment I opened the locked dojo door and entered, leaving only me and Da-mi in the spacious space.

    -Whack…!

    “Jjoop… Ha-um… Chup, jjook…!”

    Da-mi rushed at me.

    She threw the bag she brought to the floor, wrapped her arms around my neck, pressed her body close to mine, and kissed my lips as if she would devour me.

    “Haa…! Eung… Chureup… Jjook…♡”

    She who had been following me with elegant steps just 10 seconds ago, was now like a beast, exploring my lips and tongue with a lot of excitement.

    She breathed hot breaths and wrapped her tongue around my tongue with a thick tongue. We exchanged sticky saliva.

    As I received the kiss, with the hand that wasn’t holding the Americano.

    -Squeeze… fondle!

    I fondled her butt. I naturally enjoyed this affair with the married woman.

    At the same time, a small question popped into my head.

    ‘How do they accept it if I mix bodies with someone I’ve already seen everything with in the dojo?’

    The moment I had that question, a hologram window popped up in front of me.

    ===============================

    [ Help ]

    “Members basically prioritize relationships outside the dojo.”

    “However, if head instructor Joo Seong-hyeon first mentions exercise, massage, or nutritional supplement injection as ‘things to do at the dojo,’ all actions are recognized as things between the head instructor and the member.”

    “For example, insertion immediately after saying ‘I’m going to inject nutritional supplements’ is not recognized as sex.”

    “Even if other members see head instructor Joo Seong-hyeon giving guidance in the dojo, they don’t find it strange.”

    “This system is applied flexibly for the happiness of head instructor Joo Seong-hyeon.”

    ===============================

    I see.

    If I start kissing like this and start having sex now, it’s just sex.

    For example, if I say to Da-mi, ‘I also provide nutritional supplements to the members. I’ll give it to Da-mi too~’ and then insert my penis.

    Even if I do the same thing as sex, it’s regarded as a massage of her vagina and injection of nutritional supplements, not sex?

    Okay. I acknowledge the flexible system.

    Reception completed.

    After checking the system’s help, I focused on skinship with Da-mi more comfortably.

    Anticipating the moment I inserted my penis into the vagina of this damn attractive married woman, whom I had tasted all night long last time.

    “Chuuup… Haa… Seong-hyeon… Does kissing me make you horny? I think your penis got hard…♡”

    “I’m going crazy with horniness. I thought I was going crazy since I saw the selfie you sent me yesterday.”

    “Hehe… Did you masturbate with it, by any chance?”

    “Of course I did. I did it while thinking about having sex with Da-mi.”

    “Peck… Me too… Haa… I did too. I sent Seong-hyeon a picture and… Seong-hyeon’s thing is…”

    -Slide

    Da-mi dropped her body slightly, lowered one arm and groped my penis over my pants.

    Even though it was felt over the pants, the cautious and affectionate touch made my body unbearably hot.

    “This big thing… Seong-hyeon’s penis, which is bigger than my husband’s… I remembered it poking my vagina… so I masturbated while thinking about it too…♡”

    “Is that why you perked up your nipples when you took the picture because you were thinking about my penis?”

    “Hehe… Not really?”

    “Not really?”

    “Because my nipples get hard just thinking about Seong-hyeon♡”

    “…….”

    -Squeeze…!

    “Oh my… Our head instructor is excited?”

    “Da-mi. I can’t stand it anymore…”

    “But not yet.”

    “Yes? You said not yet?”

    She kissed me stickyly with her lips, and excited me by touching my penis with her hands.

    When I tried to have sex right now, Da-mi shook her head, saying no.

    With her face flushed red, she had lust in her eyes, just like me.

    Thanks to that, I asked back stupidly as if I was stunned.

    “Eung… Peck!”

    Da-mi made a cute pecking sound with her lips and smiled with her eyes.

    “Can you go into the office for a while? I’ll get ready.”

    “Get ready…?”

    “Get ready. I’ll wash my body in the shower room and put on the gym clothes I brought.”

    “…….”

    “If you look at me with such hot eyes…♡ Really, you’re so eager to eat me up? Don’t worry. I want to be eaten up by Seong-hyeon too. But just a little bit… Just wait 20 minutes. Got it?”

    “……Yes. I’ll wait.”

    “Good boy, our head instructor.”

    -Peck!

    Da-mi, who gave me one more kiss at the end, took the bag she had brought and headed towards the shower room.

    “…….”

    I barely managed to hold back the urge to follow her right away and take off her clothes.

    If she had just come here as a member, I would have pushed her to say she didn’t have to wash and attacked her.

    But Da-mi is using exercise as an excuse… Yeah. Exercise is exercise, but it’s clear that she came here to have sexercise with me.

    Since she came to have an affair, I couldn’t just do what I wanted.

    I had no choice but to follow her words.

    “…Should I change my clothes too.”

    I changed into a uniform in the locker room. It’s a bit much to be naked already, and the uniform is definitely more comfortable for taking off and having sex right away.

    After that, I sat in the office and waited for Da-mi, shaking my legs.

    “But what kind of gym clothes did she bring? Didn’t she just come here to have sex with me? Did she bring it to make an alibi?”

    While worrying about the minor question, I calmed my head, which was about to go crazy with excitement, even a little bit.

    That 1 minute felt like an hour for 30 minutes.

    It exceeded 10 minutes. From around 20 minutes, 1 minute felt like 2 hours.

    Anyway, that time passed.

    “Seong-hyeon? I’m all ready.”

    “……!! Yes!!”

    When I heard Da-mi’s voice calling me from the dojo, I jumped up from my seat and burst out of the office door.

    And.

    In front of me, who had waited 30 minutes like an eternity.

    “I’ve never worn something like this before… Does it suit me?”

    “…….”

    Da-mi was there.

    In an outfit that seemed to be begging to be eaten.

    It’s definitely similar to what I put on Yu-na, but it gives a completely different feeling.

    Da-mi was wearing tight leggings.

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