Before my sister and I looked on, the teacher returned to his original appearance.

    I took off the wig, removed the special lenses, removed the makeup seals on my eyes and mouth, and finally, with a “Whoop!” push, I heard a cracking sound as if something was ripping, and my chest swelled up.

    “Ah, it’s better to fill it up than to reduce it.”

    ““… .””

    As my sister and I stood there speechless, the teacher tilted his head.

    “Why?”

    “It’s more of a transformation than a disguise… .”

    “If you don’t know the other person well and they have an impressive point like a scar on their face, it’s easy to fool them. Even if you have a limited number of points to pay attention to when recognizing the other person, it’s hard to notice the disguise.”

    The teacher said, pulling out the cloth from inside her blouse that was probably binding her chest.

    Ah, indeed… . I understand… .

    “Why is the chairman still naked? Can he put on clothes now?”

    “Ouch!”

    My sister screamed softly and ran towards the door where she had first appeared. The teacher smiled and spoke to me.

    “Okay, now that you’ve done it, put your hands up.”

    “?”

    I wondered what he was talking about, then realized I was still holding the knife I had just made in my hand.

    I let go of his hand in surprise, and the teacher grabbed it out of the air and spun it around to check its appearance.

    “It must have been drawn in a hurry, but the details are good. You even recreated the slight scratches on the side of the blade.”

    “I was so… focused… .”

    If you quickly draw a picture and realize it, it won’t last long and will quickly disappear if it collides with something.

    When you think about it, the level of completion of this knife, drawn in just a few seconds, is truly amazing.

    Because I was really focused.

    Because the imagery was sufficient.

    “I don’t know much about drawing, but anyway, it’s important to focus. You did well. If you learn how to maintain that focus, it will help you in many ways.”

    That suddenly reminded me of the conversation I had with Saya this morning.

    “Did you hear something from Saya Unnie?”

    “Yeah. I guess I’m depressed because I can’t be of any help. But, well, I don’t think I really need to do anything. Look, I’ve proven that I can use my powers without a writing instrument, and that I can draw quickly and still complete it to a high standard.”

    If you say it like that… that seems to be the case.

    It was more like something I did out of desperation.

    “So this is… something you did to help me discover new ways to use my powers…?”

    “… Well, I did think that it would be good if it happened that way. However, I can’t agree with the idea of artificially pushing them into extreme situations to grow them. The original purpose was different, and the current result is closer to an unexpected harvest. ”

    “Original purpose…?”

    “Yeah. What kind of sister is that… .”

    My sister, who didn’t know English, raised her hand slightly as she came back dressed.

    “… It’s probably because of my consultation.”

    “Advice to sister?”

    The story seems to go back to last night.

    Seha, the teacher said that she received counseling from her older sister. The content was….

    “My younger sibling has been trying to do some really dangerous things lately, and I don’t know what to do. Like touching myself in public, or leaving kiss marks in places where people can see me.”

    I looked at my sister.

    My sister lowered her head and muttered, ““I’m sorry… .”.”

    “Oh, it’s not something you should feel sorry about, Sister… .”

    “No… . It’s my fault. I should have said properly that this wasn’t right, but I didn’t, and most importantly, I shouldn’t have consulted Seha about it… .”

    “That evaluation is too harsh. This side also worked very hard for the family welfare.”

    My head was a little sore, but I decided to ask the question I was most curious about first.

    “… What on earth is this place?”

    The photographs on the wall did not appear to be manipulated. If they were not real people but someone who had manipulated or edited them, then in a sense they would be the work of a very mad artist.

    “An exhibition hall of crazy serial killers as you see them.”

    “What about that serial killer?”

    “It hit me a few days ago while I was working… It’s gone now. I was wondering what to do with this place, and I thought I had a chance to use it effectively, so I used it. It was very persuasive, right?”

    The teacher answered refreshingly. Contrary to the refreshing tone, the content was terrifying.

    “… It wasn’t at the level where you could discuss persuasiveness. It would be traumatic.”

    I just said that because I didn’t want to get into the scary part.

    Then the teacher smiled and answered.

    “I thought it wouldn’t be a bad thing to be a little scared. If you knew that there was a guy out there who wanted to catch pretty girls and ruin them, you wouldn’t be the type to tie up your guardian and wander off alone.”

    After consulting with my sister, she followed us around today, but she said she originally thought she was just going to take dangerous pictures and threaten us (or pretend to).

    The reason why the level suddenly went up is because I crossed the line.

    I couldn’t help but sigh at those harsh words.

    “… I’ll reflect on it. I’m sorry, sis.”

    My sister didn’t know what to do. I think she felt sorry for tricking me by taking advantage of the teacher.

    Looking back, I think what my sister said was subtly different from what the teacher said. It certainly wouldn’t have been easy to respond with a clear mind to the words, “How many times more sensitive?”

    “Really. It’s scary, but… I hated seeing my sister being held by someone else, so I’ll never do something dangerous like that again.”

    Something similar has happened before.

    At that time, our situations were opposite.

    “Th-forget about that. Why on earth did you do that, Se-ha? Acting was so hard!”

    “The chairman said that Yuren’s mistakes were his own fault. And it’s not like he’s not really at fault, right? Yuren is a dangerous beast right now, right? If the chairman keeps accepting everything like that, he might end up walking around naked with a leash on?”

    “Don’t make my little brother into a person without common sense! No matter what, don’t go that far…!”

    … … .

    … … … … … .

    … … … … What should I do, I can’t look into your eyes… .

    “… … Yuren?”

    “Bah, I reflected on it… so I won’t do it… .”

    “… .”

    When I answered quietly, my sister remained silent. She must have been thinking, ‘You were thinking about doing it before?’

    “Don’t worry too much. It’s not because you don’t have common sense. It’s because you like it so much that you want to do every dirty thing you can think of with the chairman. It’s common. If the chairman had just said ‘no’ seriously, it wouldn’t have happened. But… can you do it?”

    “… .”

    My sister kept her mouth shut.

    … Sister?

    “… I don’t have… confidence.”

    “… .”

    “… If it was just a joke, I could say no, but if Yuren… really wants it… I don’t have the confidence to say no… .”

    “… … … … … … Sister?”

    I raised my head and looked at my sister.

    My sister looked seriously worried. She wasn’t joking.

    And the teacher took it seriously.

    “Of course, if rumors spread or something like that has a negative impact on my younger sibling, I’m going to be careful not to let that happen, but the problem starts when I can’t say ‘no’ in the first place.”

    “Over there, over there… . I, I reflected on it! I won’t do it!”

    “Really? You still think so after hearing what the chairman just said? Didn’t the chairman just say that you couldn’t refuse anything he asked you to do? ”

    “읏… .”

    This is probably a sure thing… I’ve probably been exposed to a lot more dirty stuff than my sister. Things that my sister couldn’t even imagine came to mind in an instant. My reason… felt like it was melting… .

    The teacher sighed.

    “I’m not trying to blame you because if Senior Saya wanted it, I would never say no. But if only one of us steps on the brakes, it’s dangerous if neither of us has the will to do so.”

    My sister and I just remained silent, our faces turning bright red.

    The teacher, who was watching our reaction, said:

    “Okay, then let’s try this?”

    ▷▷▷▷▷▷▷▷▷▷▷▷▷▷▷

    30 minutes later, the teacher took my sister and me back to the mall. We bought something from the leather fashion store we had stopped by earlier and said goodbye.

    “Then I’ll be going now. I have debts to repay.”

    “Jo, be careful on your way in… .”

    “Yeah. Then, Chairman, you know, right?”

    “… Is this really the solution, Seha?”

    The teacher looked at me and smiled meaningfully.

    “Imagining something in your head and actually experiencing it are completely different. If you experience it from the perspective of the person being hit, you will make fewer excessive demands… and even if it doesn’t work out, it will create a new play pattern, so isn’t that a benefit?”

    After saying that, the teacher really left.

    My sister sighed and carefully adjusted my ‘leash’ so that it wouldn’t be seen by others. Although her expression was clearly unwilling, the [order] left by the teacher was still binding my sister.

    The content of the order that the teacher carefully left for me and my sister was as follows.

    First, before starting play, create a ‘safe word’ that can stop each other at any time.

    Two, I’ll say the most obscene thing that comes to mind at that time.

    3. If there is a play that ends without using the safe word… Next time, switch positions and try again.

    … That is, my sister and I came here to do the ‘soft bondage + rotor attachment + leash shopping’ that we were doing earlier.

    This time, instead of my sister, I wore the bracelet, attached the leash, and attached the rotor to a sensitive area. Since I wasn’t going to be controlling it, I also made a wireless switch. It’s not like it sends out any signals or anything…

    We changed our clothes and faces completely to reflect on our previous mistakes, so no one would recognize us, but we couldn’t avoid blushing.

    It seems like my sister was in a difficult situation as well, but it didn’t end with just standing still.

    “Then shall we go… .”

    “… Yeah.”

    I moved carefully following my sister.

    The vibration of the rotor seemed to be something I was getting used to, but it was a different story when I started walking. The gentle vibration stimulated my sensitive parts, and my steps became unsteady without me realizing it.

    My sister reached out and grabbed my arm. I barely found a place to lean on and hung on to her arm. As I did, the rotor attached to my chest dug into my chest even further, and the vibrations seemed to intensify.

    “Oh, sis… .”

    What made my heart race more than the sensation of being stimulated by the vibration was the thought that my sister’s arm was also feeling this sensation.

    In that state, I followed my sister through the shopping mall, feeling almost like a cicada hanging from a tree.

    I was as concerned about the surrounding gaze as the vibration of the rotor. I redrawn it with a completely different face, but… If there is no special model, I end up drawing it as a pretty face.

    “… Do you want to say a safe word?”

    My sister whispered, seeming worried.

    Safewords also have the limitation that only the ‘subject’ can say them. Otherwise, my sister would run away right away, so I put it there.

    “Okay, it’s okay… . I should get what I deserve for what I did to you earlier. I wish you would be as bad as I was earlier.”

    “I didn’t treat you that badly.”

    My sister said that and sighed.

    “But if we’re going to do it, we’d better finish it quickly. Let’s go.”

    My sister said that and kissed my neck. The eyes of the people around me who had been glancing at me openly gathered.

    It wouldn’t be surprising if someone noticed the hidden collar under this neck cuff. My heart started pounding harder at the thought.

    And the vibration of the rotor also became more intense.

    “Oh, sis…?”

    “Every time you were embarrassed while kissing in public like this, you would vibrate hard? There were three times when you intentionally rubbed your chest in front of the clerk.”

    My sister’s gaze was very serious.

    I know. Those are my sister’s eyes in fighter mode when she’s challenging a difficult situation. It was clear that she was actively trying to overcome this situation.

    “Black… Ahh♥”

    The vibration of the rotor suddenly became stronger and then decreased significantly.

    Even without a motor, if you use the highest intensity, your body and clothes will shake and be exposed. So, I just used the highest intensity for a very short time and then reduced it… It had an additional effect that I couldn’t tell from the position of the person operating it.

    The movement of the rotor, which was overly regular and therefore somewhat disappointing, now has irregular dynamics.

    A strong stimulus that comes just as you are getting used to the vibration. The nipples become sensitive as blood flows to them, increasing the effect of the rotor.

    But by the time the moans start to flow out, the vibrations have weakened… and you find yourself waiting anxiously for the stimulation to come again.

    “Sister… .”

    “Are you having a hard time?”

    I looked at my sister pleadingly, but my sister, unaware of my feelings, only gave me a worried look.

    “Oh, no… .”

    I could never say things like, “I don’t mind getting caught, so please turn up the strength of the rotor,” or “I wish you would actively touch it so that it doesn’t stop with the twitching.”

    If I could, I would like to fill this void with my own hands, but I can’t do that with my hands tied and everyone’s eyes on me.

    The fact that I had no choice but to cling to my sister’s finger weighed heavily on my heart.

    I realized that earlier, I was so caught up in watching my sister’s embarrassed expression that I had no idea what I was doing.

    In conclusion, I had no choice but to walk inside the shopping mall, barely holding myself up, mentally and physically clinging to my sister.

    I visit stores that I haven’t been to before and that I’m not usually interested in. My sister, who was determined to finish her homework quickly, did the same things I did before, including the number of times and the order, but she almost eliminated the gaps between them.

    As a result, we ended up with a strange sister who would go to the store, show off her affection, and then run away.

    “Now… it’s a movie theater.”

    “Ugh, uhm♥”

    I can’t say that the stimulation from the rotor was that great. But it was true that it kept my body agitated. I went into the theater wondering if it would be okay until I left.

    The film my sister chose was an art film from an unfamiliar country, so maybe that’s why we were the only ones in the audience even after the lights went out and about five minutes had passed.

    I felt a little relieved….

    At this point, I think it’s okay to make a little noise before the screening ends.

    … While I was thinking that, my sister suddenly pushed me and laid me down on the seat.

    “Oh, sis…?”

    “I’m sorry. It was so hard to hold back because you had such a dirty expression on your face. I wondered why you were doing this… I really get it… .”

    My sister bent down and kissed me deeply.

    A passionate kiss, as if pressing down on me, something my sister had never done before.

    He lifted up his top and exposed his chest. He took off the rotor attached to his chest and started sucking it, hanging on to it like a child.

    “Haha♥ Aahhh♥ Hey sis♥”

    I felt like crying.

    I realized that toys are toys after all. There may be advantages. It may be possible to fondle them without others knowing, and to keep them hot for a long time.

    But still, I liked it best when my sister touched me… .

    When I was hugged by my older sister, I felt the best and happiest.

    It was so amazing and happy to see my sister hug me so tightly that it was clear that it would leave a mark, as if she had lost her self-control more than usual.

    I’m usually the active one.

    My sister accepts whatever I ask for and holds me affectionately, but there is always a consideration there, as if she were handling a piece of glass.

    I don’t hate it, but I’m so thrilled by the fact that I’m loved, but I have a little bit of regret. So I…

    “Hey, unnie♥?”

    “I wish you would look at me… . I wish you wouldn’t think of anything else… .”

    The only remaining rotor on the clitoris side began to cry with the greatest intensity. When I looked at it in surprise, my sister lifted her face from my chest and blushed brightly as she said this.

    “Of course♥ Oh, I’m only thinking of you♥”

    When I said that, my sister made a face of obvious relief.

    And then he put his face between her legs.

    Okay, wait a minute… The rotor is still attached… .

    Even though the rotor was vibrating in top mode and would have been disturbing, my sister didn’t hesitate and buried her face between her legs.

    And then… he started sucking loudly and openly.

    “Ah♥ Aah♥ That, that hard♥”

    After being stimulated for so long and seeing a completely different side of my sister, I was already overly excited.

    I felt something so strong I had never felt before coming towards me, and I felt afraid without realizing it, so I tried to pull my legs back, but my sister wouldn’t let me.

    He held onto both legs tightly and continued to caress them.

    The flickering of her tongue as it dug through the narrow gap, mixed with the sound of air and liquid being sucked in together, made my head spin at the fact that sounds that could only be described as obscene kept coming out of my sister’s mouth.

    “Unnie♥ Unnie has become strange♥”

    The caressing stopped for a moment. I looked down, flinching, and my sister looked at me with eyes filled with a mixture of shame, embarrassment, and desire and asked.

    “Then… Is that not okay…? Is it not appropriate for me to be your older sister?”

    In that question, I could tell that my sister was just as surprised and confused by her transformation as I was.

    He spoke carefully, trying to calm his rapid breathing.

    “Oh, you said before. We’re perfect sisters… . You still fit me so well… You’re such a sweet sister… .”

    For a moment, my sister looked very relieved. For a moment, it felt like I was looking at a child much younger than me, and I found myself thinking that she was cute.

    But what my sister did when she dug between my legs again was not cute at all. The brief moment of silence could not cool down my heated body.

    “Euhhh♥ Ahhhh♥ Ah, no♥ That, that’s aaan♥!!”

    But even as she cried like that, I knew that my sister wouldn’t stop, that she couldn’t stop, because I had my legs wrapped tightly around her neck.

    My sister had to make me climax twice before she could release me… .

    ▷▷▷▷▷▷▷▷▷▷▷▷▷▷▷

    It was a 1 hour and 40 minute movie, but I left around the 1 hour mark. I made the usual excuse that I left before I could finish watching it, but the truth is that my sister and I couldn’t stand it because we wanted to see each other’s real faces again.

    I left the shopping mall and took a taxi.

    I couldn’t wait to get home, so I went to a motel a little further away. There, I erased my fake face and just kept kissing for a few dozen minutes.

    Only then did I come to my senses.

    My sister and I were both too embarrassed to say anything for a while. But my sister was the first to speak.

    “This time, Seha Yang’s solution doesn’t seem to help much either.”

    “Is that… true…?”

    “Isn’t asking them to try to replicate what they did by changing their positions the intention to be careful not to go too far? Like putting yourself in their shoes, or mutual checks and balances… .”

    Generally speaking, I think so.

    “But it didn’t work out at all. … Now that I know why you did that… I don’t have the courage to refuse you even if you want something like that. On the contrary, I can only see a future that becomes more violent… .”

    I, who was on the receiving end, felt the same way. I felt helpless, scared, and pitiful, but that feeling was somehow addictive and I was drawn to it. Now that I know how much I can endure, I think I want more.

    If your actions become more extreme with each exchange, the only thing that awaits you in the end is destruction. It seems like you will find that destruction sweet and run away.

    but….

    “No, that’s why I’ll be careful. I don’t want to be with my favorite sister like this. I know that if I cross the line even a little bit, it’ll be dangerous… .”

    “Oh, what is it… . My sister is a little nervous, but is Yuren okay? No. I don’t like the fact that Yuren has become an adult before my sister… .”

    It was a playful voice, but I also heard a hint of genuine disappointment.

    I felt like it would be the perfect crime if I kept my mouth shut, but my conscience wouldn’t forgive me.

    “Excuse me, Sister… Actually, the teacher’s plan isn’t to learn mutual checks and balances or anything like that.”

    “Huh?”

    I mustered up my courage and confessed honestly.

    “Actually… I also consulted with the teacher yesterday… .”

    Last night, I met the teacher in the hallway who came home early for the first time in a while and talked to him.

    “Nowadays, I’m the one who mostly bullies my sister… but sometimes I wish my sister would do the same, so I asked if there was a way…”

    “… … … … … … … … … … … … … … … What?”

    “Then he said he would think of a way… Now that I think about it, this seems like the solution… right… ?”

    “… … … … … … … … … .”

    So, the teacher has sorted out several things at once with this one thing.

    He granted all my sister’s requests, and although he said he didn’t expect much, he made me realize another way to use my powers, made me aware that there could be unexpected threats, and while he was at it, reported the serial killer’s exhibition to the Inspector General’s Office. I even passed the responsibility on to my older sister.

    “How many things does Sehayang have to do in a day to be satisfied… .”

    “As expected, the teacher is amazing.”

    “I admit that, but I think the method he chose was too much… . When I think about it, I have some complaints about what he was doing to meet a serial killer, and why he doesn’t say anything about it.”

    That’s what it was.

    I didn’t know because the teacher spoke so casually, but I wonder what he did specifically. He may have solved it without much danger, but he didn’t even mention it…

    “And my older sister… I feel a little jealous because my younger sister seems to be attracted to the teacher. If I work hard and become competent, will I be able to earn my younger sister’s respect like before?”

    Although the tone was playful, it was really rare for my sister to even mention jealousy.

    “Attracted? That’s not it. The reason I call Se-ha-ssi teacher is because… he taught me something really important.”

    “… Something important?”

    I grabbed my sister’s hand as she spoke and placed it on my chest.

    My heart starts beating like crazy.

    I’ve felt this way before when I’ve come into contact with my sister, but at that time it was a really painful feeling. Because… I thought it was an emotion I shouldn’t harbor.

    But then the teacher showed up. I thought he was an unidentified, untrustworthy enemy… .

    “You were the first person to notice my feelings and tell me what was wrong with it. You taught me that I could like my sister and cheered me on, so I call you teacher.”

    Of course, there may have been a problem with the means… but if the teacher hadn’t shown up, I definitely wouldn’t have been able to be honest with my sister yet.

    This experience of being bullied so violently and forcibly by my older sister was also something I would never have been able to experience.

    “But, Sister, if you still feel jealous… Is it okay to take it out on this playboy brother…?”

    I placed my hand on my sister’s hand, which was on my chest, and squeezed it tightly. My sister’s hand dug into my chest, and a pleasant pain spread throughout my body.

    My sister smiled bitterly.

    “I don’t know how I became such a slut. But we’re perfect sisters… So I should become a slutty older sister to match that, right?”

    My sister laid me down on the bed and kissed me.

    It was a very rough kiss with a hand movement that seemed to squeeze my chest, but it was a very affectionate kiss that contained my heart.

    <>

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