Chapter Index

    “No, it’s been a while since I’ve done this so I’m a little anxious, but… … . Could you please assist me from behind?”

    Iria, who had been exercising without any problems so far, suddenly asked for my assistance. And while looking at me with strangely curved eyes.

    “Ugh… huh? Want assistance?”

    I stutter all my words due to a sense of incongruity.

    A different intention flashed in her eyes.

    The eyes are strange. Unstable.

    Could it be that the side effects of speaking out disappeared in that short period of time? I should have recognized it from when I took off the mask earlier.

    “Yes. It’s been a while, so you feel less relaxed? Do you really hate it?”

    “Oh, no… It’s not like that, but with a body like this, it helps… … .”

    “Foot, I’m not asking you to support my weight. I’m just asking you to look at my posture from behind.”

    “Posture? From what I saw from behind, his posture was completely flawless… … ?”

    “No, I think my pelvis is a little unstable. So, just stay behind and watch my posture. It’s not that difficult of a request, right?”

    “Ah, uh… … .”

    Even though I sensed anxiety, I couldn’t refuse her request. He wasn’t the kind of person who would quit just because he said no… … .

    -Gulp!

    Now, I too was secretly looking forward to this situation. Because my body was already accustomed to Iria’s touch… … .

    ‘And what man wouldn’t be swayed when you tempt him like this… … ?’

    Sweat had already formed on Iria’s face. Due to the increase in body temperature caused by hemolysis and hot breath, the entire body quickly became moist.

    Thanks to that, her training clothes gradually became wet with sweat, and even her body became shiny. Her already perfect body is highlighted by glistening sweat.

    A sight more fascinating than a naked body. The sight of her dizzying backside is deeply embedded in my mind.

    ㅡWindle, wince… … .

    I grabbed my trembling lower body and stood up. Although my legs were throbbing, my instinctual desire offset the pain and helped me stand up.

    There’s nothing I can’t help you with.

    And this gym date… … .

    It was one of the things I always wanted to do in my life.

    Of course, it was a date in a healthy sense.

    We help each other maintain posture… … .

    Of course, we couldn’t rule out subtle skinship.

    ‘Tsk, I think Iria lifts more weight than me… … . Well, I don’t think that’s the purpose, so I guess it’s nothing to worry about?’

    I steeled my resolve and stood behind her.

    Taking off the mask you were wearing means that you will soon be replacing it with a new mask. I was willing to cooperate as much as I could in calming down her madness.

    But it was unclear how it would stimulate me.

    “Sit on the bench there and check your posture. Got it?”

    As I step back, Iria looks at my face reflected in the wall mirror and says. I was surprised because it was a more normal request than I thought.

    “I understand. Posture is my specialty.”

    Maybe I’m serious about exercising.

    Well, it doesn’t matter one way or another.

    Since I decided to look after Bo Jo, I have to do my best.

    “Hehe, yes. Then, should you take a good look at my pelvis?”

    -Nod, nod

    You can see it clearly without having to ask for it.

    Rather, it’s harder not to look.

    How can you turn away when you see such a desirable lower body in front of you?

    Just looking at it makes me feel excited.

    ㅡClick, click… !

    While I was commenting, Iria slowly started moving the barbell.

    ㅡShoo, shoo… !

    ㅡUgh… ! Push-hik… !!!

    Contrary to what I expected, Iria continued squatting normally. I thought about asking for something strange, but I was really focused on exercising.

    ‘I don’t really need to look at your posture? It’s so perfect. Even my posture… Pelvis too… Butt too… … .’

    This time, sit down with perfect posture and stand up again. I sat slightly behind on the bench and admired her figure.

    No matter how you look at it, it was perfect posture.

    The balance of the lower body muscles was also perfect.

    Looking at my pelvis so openly again, I felt something strange.

    ‘Meanwhile… It was squeezed out with such a perfect lower body. Somehow the tightening wasn’t a joke… … .’

    My lower body reacts to the new emotions I feel. It felt like a heavy, thick barbell was lifting its head straight up.

    “Hmm… … ?”

    It was while I was admiring the back of Iria for about a set. Did I lose strength after just one set?

    It felt like my butt was moving further back than before. Feeling of being pulled back excessively. Because of this, the curves of her firm buttocks are clearly visible through the slightly wet leggings.

    Even every time I lowered my posture, it felt like it was coming towards me for no reason.

    It feels like it keeps coming back.

    “Noona… ? My posture… … .”

    “Right? Isn’t it a little strange now? Can you please check my posture right now?”

    “The pelvis is too protruding… ! Breathe in slowly and push it in a little more… … .”

    “How will you understand if I say it that way? Please bring the bench I’m sitting on and take a closer look. Because it’s okay to touch.”

    “Ah, I understand. Wait a minute!”

    I dragged the bench closer to me. Looking at her disheveled posture makes me feel anxious for no reason.

    Of course, if the pelvis is tilted backwards in such an unstable manner, it puts a strain on the lower back. In severe cases, the disk may become damaged.

    For these things, you need to have a firm posture.

    “Sister? Just wake up. My pelvis is protruding too far back. If you keep it in this excessively backward position… … .”

    It was when I was helping him correct his posture in an enthusiastic voice.

    ㅡSrurruk… … !

    The barbell of the Smith Machine goes down rather than going up. Of course, at the same time, Iria’s pelvis also moves further backwards.

    “Ahh… ? What are you doing now? … ?!”

    ㅡKuuuuk!

    I feel a heavy sensation in my lower abdomen.

    Her butt touched the crotch.

    It seems like I fell into a trap that wasn’t a trap.

    There was a reason why the hips were extended backwards excessively.

    There was no other grand reason.

    It was just to stimulate me.

    With your elastic and soft buttocks… … .

    ㅡKkuwoouk♡ Bubibubu… … .

    Iria deliberately bent her lower body and moved her hips from side to side.

    “Kk-?!”

    “Sihuya? Why didn’t you say anything when I asked you to check your posture? This is my posture right now… … ?”

    “No… ! This is dangerous… … !”

    “Kukuk-♡ What is dangerous? What is my posture? or not… … . Your dick got crushed in my ass?”

    Iria fixed the barbell in the middle,

    I kept pushing my butt back.

    Every time I lower my posture, the ridge of her hips puts sticky pressure on my crotch.

    ㅡKkuguguguguk… ♡

    A dizzying sensation is sent to the cock that was already raising its head in response to Iria’s lower body.

    ‘Oh, so much pressure… ! This is really dangerous… … ?!’

    Iria moved her flexible lower body freely. It’s a shame because she fixed the barbell in the middle. If that heavy load had been passed on to her lower body, it would have been crushed.

    “Noona… ? Not anymore… ! Haha… … ?”

    My lower torso, which has become convex in the front, rubs between Iria’s buttocks, stimulating my lust.

    “Wow, cute reaction… … .”

    Iria’s lower body, which had been rubbing for a while, finally rose.

    “But what about Sihu? It seems like your words have become shorter again? Maybe it’s my mood?”

    Iria looks back and mutters in a low voice. Her eyes were fixed on my crotch. By the way, it seems like the focus is slowly fading away.

    I roughly expected it to happen like this, but

    When I look at these eyes, I feel scared.

    I’m afraid I’ll start crying up and down at the same time again.

    “Yeah, but… ! Suddenly sitting like this… … .”

    “Don’t be funny. You were staring at my butt with your lower body upright, right?”

    “… … .”

    “You have nothing to say, right?”

    In an instant, you become completely dumb.

    There was no room for excuses.

    Because it was an undeniable fact that I lusted after seeing Iria’s body.

    “Don’t sit around like that, get up. Stand up and stand up properly behind me. Then I will forgive you.”

    “Ah, I understand─ No, yes… … .”

    In the suddenly chilly atmosphere, polite words pop out without me even realizing it. I definitely remember saying that it would be nice to use the honorific language at times like this.

    “… … .”

    I obediently got up from my seat and stood behind her. Unable to hide the swollen lower abdomen.

    Is this okay?

    If you reach it all, you will end up reaching it again.

    But what kind of posture are you asking me to look at again?

    ㅡTeoup, tup… !

    Contrary to what I feared, Iria was holding the barbell tightly again as if nothing had happened.

    I thought he was just saying it to tease me, but I felt like he might forgive me if I just corrected my posture.

    “Oh… ? sister? The gap between legs is too narrow.”

    “Narrow? I’m not sure? You have to explain it well so they understand, right?”

    “I think you can do it the same way as before… … . First, place a space between your legs about shoulder-width apart… ”

    “Hmm? okay? I don’t know from what I’ve heard, right? Will you come closer and let me know?”

    “That… Like this?”

    I hesitated and walked up behind her.

    As I close behind my back, Iria’s hair tied back in my field of vision tickles my nose. By the way, I feel like if I get closer, my erect dick will touch it, so I become cautious.

    I’m already more careful because of the height difference. As expected, the front of the pants, which had become stiff, was located between Iria’s thighs.

    ‘If I get any closer, it might end up between my legs… … .’

    ㅡAaaahhh… !

    It was a moment I was muttering to myself.

    “Haaah… ?! Whoa, sister… … ?”

    What I imagined actually happened.

    I feel a heavy pressure in my lower abdomen.

    Iria was squeezing my dick with her two soft legs.

    The elastic thighs press against my dick as if crushing it. Cover the sensitive area tightly and continue to apply force. I could feel the muscle fibers writhing through my clothes.

    “Kkkeut… … ?!”

    ㅡFull!

    I was surprised and pulled my back back.

    I sat down, my legs shaking.

    It was a huge pressure, but

    It was easier to get out than I thought.

    It was because I was wearing pants.

    Of course, if our bare skin had been touching, it would have been a different story.

    “Sihuya? You better come back soon? Didn’t you get turned on by looking at my butt and legs?”

    “Well, that’s not true… … .”

    “When I give you a chance, take off your pants and come back? Sihoo’s favorite part of my lower body… … . I’ll give you permission to do whatever you want♥”

    “Haaah… … ?”

    Iria was still looking down at me with eyes full of sinisterness.

    “Come on? Are you really going to refuse?”

    “Well, it can’t be… … .”

    It was a really obvious story, but

    I couldn’t refuse the offer.

    No, rather, it went one step further.

    “Hey… But sister?”

    “Hmm? I can’t believe you’re saying you can’t do it now… ”

    “Could it be okay to wear a transformation suit? … ?”

    “… … ?”

    “… What?”

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