See Risa in a surprising situation! You'll have fun! Strange events, discoveries, and more fun!

Before your eyes was an image that took you by surprise, making you stifle a gasp of shock. You knew Risa would be naked, but what you didn't expect was to see her like this.

Risa was on all fours, completely naked, and it seemed she was blindfolded. You could see her beautiful D-cup breasts and her swaying ass, but what surprised you was what was clearly visible between her legs: a large, hard cock swinging between them. You also noticed that Mikan was nowhere to be seen.

Risa seemed to sense a presence because, even with the blindfold on, she turned around, and you saw her smile. "Mikan, what are you waiting for?! Can't you see how I am?! Hurry up and bring that thing you were talking about!" Risa said in an excited voice, and you saw her swaying her ass.

You back away, still very embarrassed, and turn to walk away. But as you turn, you see Mikan a few feet away, approaching you with a mischievous smile. She's carrying several objects in her hands. "Well, brother, you're leaving already? As you can see, Risa is more than decided!" she says playfully. Then she takes your hand and leads you a little way. "If you're going in there, go ahead! But I want all the details afterward, got it?!" she says quietly. Then she gives you what she was holding. "Put this on, and stay quiet in there!" she says with amusement.

You look at your sister in surprise, and even more so when you see that what she's given you is a black thong and stockings. You're about to protest, but finally, you change your mind, nod, and go back to the room. You enter, take off your pants and panties, and put on the stockings and thong.

During this time, Risa had remained silent, but you could see that she was smiling in anticipation and that one of her hands was on her penis, stroking it. "Come on, Mikan! Bring that cute little ass here! I can't wait any longer!" she says sensually, and you see her moving her ass suggestively.

You smile in anticipation, noticing how your cock is getting even harder. Even so, you glance toward the door and see Lala there with Mikan, both watching you with amused expressions. You look at Lala, as if asking permission, and she nods and gives you a thumbs-up.

With determination, you nod and walk over to Risa, grabbing your cock as you position yourself behind her. Without saying a word, you begin to caress her lovely ass, watching with amusement as she sighs with pleasure and lets out moans of ecstasy.

After a few moments, she turns her head. "Come on, Mikan! Be good and make me enjoy this, okay?!" she says in an excited voice.

You smile, position yourself right behind her, and spread her buttocks, smiling as you begin to play with her anus. Listening to her moan and seeing her shudder, you smile mischievously, and finally, you bring the tip of your cock to the entrance of her anus and begin to insert it.

She laughs, startled by your cock, and begins to moan. "Mikan! You naughty girl! You too, huh?!" she moans loudly, and you see and feel her moving her ass to give you more room. "Come on, don't hold back! Give it to me hard!" she says passionately.

Hearing her, you frown in confusion, but finally, you shake your head, and without further ado, you thrust your entire cock into her ass and begin to fuck her hard, making her let out a loud moan of pleasure, while you, too, couldn't help but moan.

In a few moments, you were already pumping her ass intensely, while your moans were already very loud, and you gripped her hips tightly, enjoying the sensation, and feeling yourself reaching orgasm, unable to hold back any longer.

Finally, you gave the last few thrusts, and as you let out a loud moan, as you buried your cock deep inside her, you began to fill Risa's ass with your semen, while still gripping her hips. "It's all here, Risa, enjoy it!" you said between moans, forgetting about not saying anything.

Risa, who had been moaning, smiled mischievously when she heard you, but said nothing, and you both continued like that until she finally came too, shooting jets of semen. Then you pulled your cock out of her ass and playfully slapped her ass, which made her burst out laughing.

You looked towards the door and saw Lala and Mikan watching you and nodding contentedly. You were about to walk away when Risa turned towards you, and as she removed her blindfold, she smiled at you. "Damn! I didn't expect that, Rito! You and Mikan are just like each other!" she said playfully, winking at you. Then she looked towards the door. "You could have warned me, couldn't you? You knew I wouldn't mind!" she said with a slight annoyance, which faded, and then she looked at you again. "Okay, Rito! Now let me take care of everything, because this isn't over!" she says, before lunging at you.

When you realize it, Risa has you lying on the bed, and she's taken your entire cock into her mouth, giving you an intense blowjob while she caresses your balls, making you moan again. She pulls it out for a moment and looks at you lustfully. "You love the feeling, huh, Rito?!" she says playfully. "Relax, this is just the beginning! I'll make this the best experience of your life!" she finishes, before taking your cock back into her mouth.

You moan louder and enjoy her mouth, but you also feel an intense tingling that spreads throughout your body, becoming very intense and pleasurable. Along with that sensation, you have another orgasm, filling Risa's mouth with your semen, which she swallows completely.

Moments later, while you were still recovering, you heard Lala's voice. "Damn, Rito, that was amazing!" Lala said, having come closer and now standing beside you. "Come on, make room for me! I'll help you too!" And with that, she helped you up.

You saw Risa smiling, stretching out on the bed and opening her legs, grabbing her cock. "Much better, two! Come on, here you go!" she said, smiling at you.

You and Lala looked at each other and nodded, then climbed onto the bed together.

------One hour later----

As you bounced on Risa's cock, you moaned like crazy, while that cock entered your ass. Beside you, Lala smiled and encouraged you. "Come on, Rito, keep going! Now you see how much fun it is, huh?!" she says cheerfully, listening to you moan.

You're lost in pleasure and can't stop moaning, your moans becoming increasingly feminine, as another orgasm washes over you and you release another burst of semen. "It's the same! This is heaven! Don't stop!" you manage, as you bounce around.

You stay in that position for a while longer. During that time, Risa fills your ass with semen several times. After that, you switch positions, and you fuck Lala while Risa fucks you hard, making you both lose yourselves in pleasure for hours, until you finally collapse, exhausted. The tingling sensation intensifies.

You are helped by Lala and a smiling Mikan to Lala's bedroom, where she makes you get into bed with her, and although embarrassed, you go to sleep.

—————-

When you wake up the next morning, it takes you a while to remember what happened yesterday and where you were, but you finally remember and smile, looking around. Finally, you look at Lala beside you and smile, watching her sleep peacefully.

Not wanting to wake her, you move away from Lala and sit up in bed, heading towards the door. You wanted to take a shower in peace and wash away the remnants of the previous night that you felt on your body, but being still a little sleepy, you aren't very aware of the changes you've undergone.

As you leave Lala's room and enter the living room, you see Nana sitting with her arms crossed, and when she sees you come out, she frowns. "That's enough, you and Lala! What happened with Momo was enough, don't you think?! Rito just needed a push, not all this!" she says, clicking her tongue.

You look at her, confused, and frown. "What are you talking about, Nana?! A push? What?! What happened yesterday doesn't change anything!" you say with conviction, though you're surprised to hear that your voice sounded so much like Mikan's.

Nana suddenly stares at you, her eyes widening. "Wait a second! Are you Rito?!" she asks, surprised. When she sees you nod, she gasps. "Damn it! Lala!" she finally says, and as she walks toward the room you came from, she calls for her sister.

You look at Nana, confused, while you also see Momo come out of her room a little later, along with Mikan. When they see you, they stare at you in surprise, their eyes widening.

A short while later, Lala, still half asleep and naked except for her panties, comes out of her room with Nana. You can see how Lala initially looks at you, also surprised, before smiling and looking at Nana. "So, what was the rush, Rito? That's what I wanted, right?!" she says cheerfully, then becomes somewhat serious. "That said, those clothes don't suit you right now. We'll have to find you something more appropriate!" you finally say calmly.

You're about to ask her what she meant when you notice, for the first time, that the gray shirt you're wearing is making you feel something strange. You look down and gasp when you see obvious bumps pressing against your shirt. "What the heck!" you say, startled.

Lala looks at you, amused, and takes your hand. "What do you think, Rito?! I told you yesterday, be careful with that contraption! And look at you now! We'll have to find out what you did to cause this! Come on, come here! And you too, Momo!" she says, leading you back to her room, holding Momo along the way.

——————-

When you re-enter Lala's room, she and Momo lead you to the large mirror Lala keeps. You watch them smiling, though Momo still looks astonished. When you see yourself in the mirror, you gasp. "This can't be real!" you say in disbelief.

Your reflection shows a face very similar to your sister Mikan's, but with some of your own features. Your hair is now a darker shade, and you also see how it has grown, now past your shoulders. You also notice small bumps on your shirt, which, although subtle, are still visible. You also realize now that you've lost a few centimeters in height.

While you're still looking at yourself in the mirror, both Lala and Nana stand on either side of you. Lala looks at you intently, placing a hand on your shoulder. "It seems so, if it's true, Rito!" she says firmly. "Now, it's time you tell me exactly what you did yesterday at that party! And above all..." she says with a warning tone, as she pulls out a small package. "What on earth did you and Momo do yesterday?! And why is this empty?!" she says, showing you a small device, similar to the one in the bathroom.

You look at Momo and see that she was also puzzled. Finally, you look at Lala, nervously. "I can explain, Lala!" you say finally.

--- A while later----

You and Momo watched Lala pace in front of you, looking thoughtful, while she glared at you, annoyed. "I can't believe it, Rito! I warned you! It was a modification of my invention! I hadn't even tested it!" she says exasperatedly, then looks at Momo. "And you, Momo, you're really something, aren't you?! You should have been more careful!" she says, frowning.

You blush and look down, glancing sideways at Momo. "I'm sorry, I'm sorry! I don't know what happened!" you try to explain quickly, finally taking a deep breath and looking Lala straight in the eye. "But there's a solution, right?! I mean, from what you're saying, it's just a side effect!" you say hopefully.

Lala nods, hesitantly, but she seems nervous. "It should be possible, yes! But I need to know exactly what you did the other night! Because the effect of my invention doesn't explain these changes, or why that toy reacted that way!" she says nervously, pointing to the device that was now a few feet away, the one in the bathroom.

You look at her and nod, and begin to explain what happened at the party, and also, because of her insistence, about the bathroom incident. As you continue your explanation, you see how Lala's eyes widen and she becomes increasingly nervous, to the point that when you finish, she paces frantically and seems more and more restless. "Okay, Lala! What's wrong? Why are you so nervous? It's a matter of reversing it, isn't it? No, it's like it's permanent!" you say, trying to sound convinced.

But she stops and you see her hesitate, until she finally speaks. "What's happening, Rito! The thing is, the device wasn't designed to genetically change you into a woman, and it also wasn't designed to detect your orgasm and classify it as female! When it made you come the first time, it should have deactivated!" She says, visibly nervous, while glancing between you and Momo. "What I mean, and as Momo knows, is that it's designed to give women maximum pleasure. It would only make men ejaculate normally!" she says nervously.

You look at her, puzzled, then at Momo, who is nodding and looking at you nervously. You swallow hard and look back at Lala. "What exactly does that mean?!" you ask, increasingly nervous.

—————-

When you leave Lala's room, you try not to look depressed and smile, as you see Nana and Mikan turn to look at you with broad smiles, but you also see how disappointed they seem. "Solved! Lala was able to fix it!" you say with feigned enthusiasm, before looking at them both seriously. "And with that sorted out, you'd better not try any of those weird ideas again, got it?!" you say seriously.

In front of Nana and Mikan, you could see the same old Rito again, physically, but now wearing a red shirt and blue pants. Nothing remained of the features that used to resemble Mikan's. Behind him walked a smiling Lala and Momo.

Mikan is the first to speak, staring at you intently while frowning. "Well, next time, don't go around sticking your dick in any needy ass, brother!" she says with a slight hint of annoyance mixed with concern in her voice, then smiles. "I'm glad to see you sorted it out!" she says with genuine joy, then turns around and heads for the exit. "I'd better go make breakfast!" she says cheerfully, as she opens the door and leaves.

Nana, meanwhile, was looking at her sisters, and you could see that she wasn't entirely happy with your words, but she still smiled. "Well, if you say so, all the better! But, I'm telling you, next time, think twice!" she says wearily, before going to her room.

When Nana left, you sighed with relief and looked at Lala. "That was close! Now, I'd better go to my room! And please, if you find out anything, Lala, let me know right away!" you say in a pleading tone, before quickly leaving for your room as well.

------ One hour later----

As you lay in bed, you kept turning over in your mind what you had discovered. For some reason, the effects of Lala's invention were still lingering in your body, and it seemed that you were slowly becoming physically like your sister Mikan again. The tests Lala had performed left no doubt; genetically, it seemed you were turning into Mikan. Lala had promised to find out what had happened and investigate how to reverse these changes. For the time being, she had given you a small device that created an optical illusion, making everyone else see you with your normal physique.

You sighed and reflected. I also recommended that you refrain from any further sexual activity, including masturbation, just in case. Although it was very difficult to resist the temptation, as you noticed your penis was very hard and needy, and you also felt a strange itching in your anus that was making you very nervous.

Wanting to get those thoughts out of your head, you finally sat up and decided to go downstairs for breakfast, since you had plans to meet your friend Saruyama at midday, and you hoped that at least he would help you forget, for a while, those strange thoughts and the situation you were in.

You decide to change your clothes, and above all, put on something more comfortable. You put on red panties, and having no other choice, and swallowing your pride, you put on a red lace bra that Lala had given you. Even though it was for a bust like hers, at least it helped a little with the discomfort. Then you put on dark blue pants, a green shirt, and a jacket.

Once ready, you leave your room and go downstairs to the dining room, intending to have breakfast.

--- After a while-

While you were finishing breakfast, you listened to Celine and Mikan talking quietly. Lala had also finished breakfast but was very quiet, only responding vaguely when spoken to, and glancing at you from time to time with a thoughtful expression.

Momo and Nana appeared just as you were finishing, and it seemed they'd been arguing for a while, judging by their annoyed glances and whispers. But they finally stopped whispering and sat down.

When you finished breakfast, you got up and checked the time. Saruyama had said he would arrive in an hour. You were about to go and wait for him, but when Lala saw you get up, she stood up too, gave you an intense look, took your hand, and led you away.

------ Lala's Room----

You frown at Lala, trying to process what she's saying. "Are you sure, Lala? Don't you think there's another way?!" you ask, eyeing Lala's latest idea, which looks like an anal plug attached to a tube. "I mean, he's Saruyama, my friend! Nothing's going to happen between us, I don't think this is necessary!" you say hesitantly.

But Lala shakes her head and insists, still frowning. "I don't want to take any risks, Rito! Like I told you before, it's all very strange! This invention of mine makes it impossible for you to ejaculate, and the plug, instead of giving you pleasure, will give you a painful shock if it detects even the slightest arousal! I tested it on that idiot Zastin! The poor guy never wanted to be a pervert again after that!" he says confidently, then makes you pull down your pants and panties. "Besides, I see you're wearing those panties again! And I want to make sure you don't do anything reckless again! That's why I've made sure this works properly. Put it on, and I'll activate it. When you come back, I'll deactivate it!" he says, giving you a penetrating look.

You're going to protest, but you finally give in and let Lala place the tube on your cock, gently caressing it and making you sigh with pleasure. Then it was the plug's turn, which she smeared with a blue liquid and ruthlessly inserted into your ass, making your whole body shudder.

She ignores your reaction and, after sitting up, picks up a small device. "Now, finally, activate this!" she says with determination, and you see her press a couple of buttons. You feel both the plug and the tube contract, and you feel a strange sensation run through you, and you feel your cock finally soften.

Seconds later, a robotic voice comes from the device. "Setup complete, subject detected! All good!" the mechanical voice says. "Male libido suppressant activated! Subject recognition correct, detected correctly as male!" it finishes, and an orange light illuminates.

Lala nods contentedly and looks at you with joy. "Perfect! Now you don't have to worry about any more surprises! You can get dressed again!" she says cheerfully, then helps you get dressed and makes sure the illusion device is still working.

You nod and get dressed again, while Lala sets the device aside. What neither of you notices is that, when you briefly look back without the illusion, the other device changes colors from orange to blue, and a message briefly appears, lasting only a few seconds.

—————-

As you walk along, you listen to Saruyama talking cheerfully, laughing and joking with him, listening to his witty remarks, and feeling at ease, having forgotten for a few moments what had happened in the last few hours.

You were near a park, talking, when you saw a group of girls not far away, chatting happily and laughing. Among them were Hitomi and Ayumi, and with them were several other very beautiful girls. Some of them looked familiar; you thought they were Mikan's classmates. You couldn't help but stare intently.

Saruyama, seeing them, gave them his usual mischievous look, nudged you in the side, and smiled when he saw you looking at them. "Well, I see someone's having a playful day, huh?" he whispered, then placed a hand on your shoulder and nodded. "I like the idea! Let's see if those lovely ladies want some company!" he said playfully, pushing you toward them as you walked over.

You let yourself be led, feeling embarrassed, while you watch as Saruyama, upon reaching them, begins to flirt. You say nothing, still embarrassed, and just shyly glance at the girls, feeling uncomfortable. They look at Saruyama with some amusement, and some walk away, but Hitomi, Ayumi, and another girl with brown hair stay, watching as Ayumi whispers something in Hitomi's ear, and as Hitomi looks at you with what seems like surprise at first, before finally smiling.

Little by little, you gain confidence and engage in a pleasant conversation with Hitomi and Ayumi, while you watch the other girl, who introduced herself as Megumi, chatting happily with Saruyama. Gradually, you notice how Hitomi and Ayumi become very close to you, and how affectionate they are, something you observe with mild surprise.

You stay like that for a while, until finally you decide to go to a nearby cafe for something to eat.

------- A while later---

While you were having smoothies and snacks, you were chatting happily with Hitomi and Ayumi, who were also joking with you. You had to stifle a gasp of surprise when Hitomi's hand suddenly traveled to your pants and began caressing your crotch, while you watched as her expression remained unchanged.

Meanwhile, Saruyama seemed to be having quite a bit of success as well, because aside from an intense blush on his face, you saw him and Megumi get up after a while and apologize, saying they were going to order something else and would be right back. You smiled; Saruyama seemed to have been lucky.

When they left, Hitomi and Ayumi looked at each other and smiled, then turned to you with wide grins. "Well, it looks like your friend is going to be entertained, don't you think, Rito?!" Ayumi said cheerfully, winking at you as she let out a giggle.

You nodded shyly, but smiled. You were about to say something when Hitomi spoke up. "Now that we're alone, are you going to tell us, or not?!" she said with a mischievous look. "Do you want to imitate those two or not? Because your little friend is more than ready, huh?!" she said playfully, while caressing your crotch.

You looked at her nervously, but seeing their expectant looks, you nodded, even though you knew you shouldn't. You couldn't help it, and you were also surprised that Lala's invention didn't seem to be working. "Okay, let's go somewhere quieter!" You tell them needily.

They smile and nod, and as the three of you get up and pay, you don't go to the restrooms as you expected. Instead, they lead you to a house not far away, which you discover is Hitomi's house.

—————-

When you arrive at Hitomi's room, they rush to kiss you and lead you to the rather large bed, where they make you undress, leaving you in your bra and panties. You realize they were staring at you intently.

You try to say something, but it's Ayumi who looks at you with a frown. "So, what you were using to disguise yourself didn't include clothes, huh?! Now I understand everything!" She says with a hint of annoyance, and then she and Hitomi make you pull down your panties, revealing your powerful erection and the tube you were wearing, to which they look at you bewildered. "Why are you wearing this?! You're not going to need it, you know?!" Ayumi says, and makes a move to take it off.

You're about to tell her you can't, when you're surprised to see the tube slide easily off your cock, and how your cock trembles with anticipation. You also notice how the plug in your ass seems to vibrate, making you let out a moan of pleasure, due to that and to Hitomi and Ayumi's hands. "Wait, this isn't what it looks like! I have to stop...mhhhhhh!" You try to speak, but you can't finish the sentence because Hitomi lunges to suck your cock, making you moan and close your eyes.

Ayumi, meanwhile, while caressing your balls, looks at you. "Shh, relax! Don't get nervous. After all, you weren't this nervous the other night, were you?!" she says sensually in your ear, while caressing your chest. "Or am I mistaken, Rika, or should I call you Mikan?!" she finally asks.

Upon hearing her, you open your eyes wide and look at her with a mixture of fear and surprise. "You two... knew?" you say in a trembling voice, shuddering with pleasure and fear. Finally, you grab Hitomi's head. "Stop, please! And explain this to me!" you plead, as best you can.

Hitomi stops and looks at you, amused. "We suspected something the other night! But seeing you today, along with smelling that exquisite fragrance and that brand we saw on you, we had no doubt!" she says playfully, then places a kiss on the head of your cock. "Besides, we'll have time to talk later! Now let's get this over with and make sure you enjoy it to the fullest!" she finishes, and decisively, takes your cock back into her mouth.

You moan again, but you can't react, and you let yourself go, nodding, until finally, under Ayumi's approving gaze, you pull Lala's device out. Soon you fill Hitomi's mouth with your cum, while you grab her head and let out an intense moan.

After that, they separate from you and the three of you settle into bed, while you forget everything that came before and focus on enjoying the experience. Before you know it, Hitomi is on all fours, her ass being pounded hard, while behind you, Ayumi is fucking you, making all three of you soon moan like mad.

For the next two hours, you lose count of the orgasms you have, being fucked by both of them in multiple positions, while they fill your ass with cum, and you swallow quite a bit too, but you end up very happy and satisfied.

After that, the three of you went to take a shower to clean up before going back out. They were more than happy to help you clean up and promised not to say anything. They also finally explained the mystery of the whole thing, which made you swallow hard and feel very nervous, but when you saw your reflection, you understood that it was true, so you accepted their explanation.

When you left Hitomi's house again, you felt satisfied and more relaxed, with a new set of clothes for yourself. Even though you were still using the tube and the stopper, and especially the illusion device, you still held a faint hope that Lala could fix everything.

——————-

When you arrived back at the cafeteria, you were amused to see Saruyama beaming. Although blushing, he was chatting happily with Megumi. You also noticed he seemed to have gained muscle, and his features were more masculine. You smiled, realizing what had happened.

They smiled at you when they saw you arrive, and you saw Megumi looking surprised to see you unchanged, but she didn't say anything. You and Saruyama continued talking for quite a while longer, until finally, as it started to get dark, you said goodbye to them, and you and Saruyama headed home.

On the way, Saruyama gave you a mischievous look. "Damn, I don't know about you, but I wasn't expecting that today!" he said excitedly, then patted you on the back and laughed. "You'll have to explain to me another time how you managed not to get infected, because judging by your face, those two really gave you a good workout, didn't they, Rito?!" he says jokingly, and bursts out laughing.

You look at him with feigned annoyance and laugh, but you don't say anything. By the time you part ways and say goodbye until the next day, you're nervous again as you walk back into your house.

After taking off your shoes, you head straight to the dining room to see if Lala is there, but when you arrive, you find Nana and Momo, and Celine standing next to them. All three of them look at you and greet you with smiles. "Welcome, Rito! You're just in time. Mikan told us dinner will be ready in less than an hour!" Nana said kindly.

You nodded and smiled at them, then went to the kitchen. After exchanging a few words with your sister, you headed to your room, intending to change into something more comfortable and, while you were at it, go to the bathroom. Your cock was hard again.

----- Minutes later ---

After taking off the clothes you'd been wearing, you finally put on a new set of underwear and removed the illusion device. Looking in the mirror, the image was now more than disconcerting.

Your hair was practically the same shade as Mikan's, and it had grown longer, just like your eyes and face, which were also very similar. You were now almost the same height as your sister, and although your breasts were still considerably smaller than hers, your buttocks had also grown. Furthermore, your penis was now about eight inches long. You removed the tube and the plug and put the device back in.

Sighing, you grabbed a towel and headed towards the bathroom, but as you stepped out the door, you came face to face with Lala, who looked at you happily and smiled. "Well, Rito, you're back! Excellent! I have great news for you!" she said in a very cheerful voice, giving you a satisfied look.

You looked at her curiously and nodded, waiting for Lala to tell you the reason.