Sorry for how long this took me... I've run out of inspiration to write anything at all and that includes the prompts here, but I tried to come up with a small story of how they would meet and their dynamic :0

I will choose Ms🌟 for this because I haven't seen anything like it before! And the younger they are the more insane I get.

Perhaps one day, after a certain visit to Saki in the hospital, Tsukasa leaves sits down on a bench in a park nearby to rest, a distant, empty expression replacing his usually smiling face while unfitting thoughts for an upbeat and undefeated future star swirl around his head. He is alone (or so he thinks) so he allows himself to have at least this moment to dwell on them before trying to do something to cheer himself up, but suddenly, a little kid with bright purple hair and yellow eyes approaches him with a kind smile and offers him a balloon that resembles a flower.

Dumbfounded, Tsukasa asks himself why, and before he can voice his question out loud, the boy says "You seemed so sad, sir! I hope this can help in bringing a smile to your face." And of course those strike a deep chord with Tsukasa, who as we know, shares the same objective in a way, to make happy those that surround him. Although, in this case, it's embarrassing to be cheered up by a kid.

That was the beginning of a good friendship, despite the age difference in between both of them. Every time Tsukasa went to that park after going to the hospital, Rui (he told him his name afterwards) would be there there, and they quickly bonded over their love for shows and acting. With time, Tsukasa would grow see him as just another little sibling, but Rui would develop a huge crush on his Tsukasa-nii instead, saying things like "When I grow up, I want to marry Tsukasa-nisan!" and starting to treat him like his fiancé. The middle schooler would be surprised and embarrassed to hear such things and he would tell Rui that he can't say that, that it's wrong and so on, but nothing would stop little Rui's determination... And he will make sure that Tsukasa becomes his wife!...

...No sex for now because I ran out of brain juice but suggestions will be appreciated when I open my retrosping inbox again 🥴 I need to see that shota dick inside Tsukasa too...

This is immediately going to Ruiverse x original!Tsuka which is always a delight of course 👍 and well, with how much Rui loves his Tsukasa-kun, they all would immediately want to get as near of him as possible and know more about him, since he clearly doesn't look like the Tsukasas they are used to. They would also get jealous and mad at each other because of this... Maybe everyone thinks this is "their" Tsukasa, just looking a bit different and nothing more, it would be a funny idea. And Tsukasa almost having a heart attack because what the hell is actually happening with so many Rui's around him? But of course, we all know this ends up in a Tsukasa gangbang 😔🙏 how it happens it's up to you, but I want to think about how some of the Ruis would act...

Ringmaster🎈: The first one to approach Tsukasa. The moment he set his eyes on him, he saw a new prey to tame. He's surprised to find out how different this Tsukasa is to the one he's used to -a bratty, provocative mess-, so he has to hold back on his usual sadistic demeanor and techniques, and although he is mean enough to make o!Tsukasa cry, he does so through pleasure.

Sorcerer🎈: Quite desperate to know more about this Tsukasa, who seems so weak and easily scared, compared to the Tsukasa he knows. He was genuinely curious, but that helpless attitude also wakes up his hunger for the boy, his need to see him ravished, to test his expressions and to hear him moaning because of his cock. He doesn't wait too long for the chance of acting upon his desires though, and is quick to grab his hips to proceed to fill his tight holes.

Gashadokuro🎈: After analyzing the situation and being aroused enough, he makes his move when he knows that this Tsukasa is just as sweet and sensitive as the one he knows. There isn't much difference between them, he notices, so he goes for one of the places he knows the boy will be very responsive to: his little perky nipples, taking one between his lips and pinching the other, just the way he would pay attention to both of Kori Tsukasa's nipples.

Staff Officer🎈: At first he doesn't show any interest (or so he wanted the others to think) but after a while, the tent in his pants and the blush on his face are almost impossible to hide. Begrudgingly, he makes his way in between the rest and decides to take his place and fuck Tsukasa's mouth, although he could almost feel guilty about how easy it is to make Tsukasa cry and choke every time he shoves his hard cock into that tight little mouth... Officer Tsukasa is definitely much more resistant to such things.

Dark Lily🎈: He was too afraid to get near Tsukasa at first. He would also bashfully call-out the other Ruis when they get too rough with Tsukasa... only to be ignored, since everyone is way too horny in the end, and Tsukasa is enjoying it anyway, so... Prompted by the rest, and not being strong enough to resist, he takes his turn in that sweet pussy, which feels just as amazing as the one he's used to. At this point he forgets all restraint and reservations he had, as he fucks Tsukasa senseless while crying in pleasure and asking for forgiveness to him, lol.

Sorry for taking so long answering, but THANK YOU SO MUCH FOR SHOWING ME THIS! It was a long, long read, but that's why I loved it too, and I really appreciated this one (I even shared it with some friends bshshbs)

Just the mere concept of a jealous Rui is something I would melt for, so this was a delight to read, especially seeing how that side of Rui became progressively worse as the story progressed, even he was aware of how irrational it was, since Tsukasa never did and never would cheat on him! And I think that was one of the things that made the story better: Tsukasa never betrayed him and never gave Rui any real reason to doubt him. Hell, even Akito was totally uninterested in Tsukasa, romantically speaking, and yet Rui's jealousy only got worse and worse... With how clearly unwell that man's brain was, I thought we were directed to a dark and sad ending. He was just so dismissive of Tsukasa's feelings during all this... He was even able to leave him crying on the floor, saying that he was leaving their home, their sanctuary, without further explanation, with the poor guy being left to starve himself for 3 days in pure depression (my favorite part ngl, you know I love fear and Tsukasa's suffering). I was very surprised at how... 'wholesome' it actually was 😭 while I do appreciate the insanely hot sex and by god I loved the scene where Rui comes home, sees Akito and Tsukasa in a compromising situation, then proceeds to knock them unconscious and tie them up so that Rui can breed Tsukasa right in front of Akito... I think Tsukasa's "mind break" (if I can call it that) was too fast... But I won't complain... I just wished that Rui didn't get his way so easily and without some remorse through all this bshwbwbwd, but seeing that the author likes completely happy endings, and that if Tsukasa had reacted in some negative way to everything he was put through, it wouldn't have been easy to get one, I can understand that. Overall, though, I had a very good time reading it, so thanks again! I love jealous, possessive Rui wanting to breed his wife, I love pretty wife Tsukasa wanting to be bred 💛💛💛

I still remember when this confession was sent to that Tsukasa page 💀 sorry for the delay, anon, but yeah, of course I agree! ! I'm a big npc x Tsukasa fan! I actually think every one of them should fuck him good, whether they are story npcs, vocaloids, or npcs from other unit stories. In fact, I had a fanfic in the works about the latter... Hopefully it will see the light of day one day...

That said, one npc I really liked to ship with Tsukasa, and I even talked with a friend about it, is that guy from L/N who's the director of a record label (forget his name) and yeah, he just gave us some of those good oji-san vibes soooo... 🤤 it wasn't hard to imagine them meeting through Saki for things to happen.

Anyway, with all the new npcs coming out lately, I think Tsukasa will never have a shortage of people to fill his holes!

WE ALL MZTK FANS POSSES THE SAME MENTALITY AAAAA!! She would practically gaslight and sweet-talk Tsukasa into doing whatever they want, and that mostly consists of trying out what Tsukasa considers "embarrassing" or even "inappropriate" outfits! Ah, but he loves his kouhai so much, and as Mizuki's model he has a responsibility to perform, and this might even help him to hone his skills as a future star!

Every time one of these sessions occurs, Mizuki showers him with praise, and even though Tsukasa is really embarrassed at first to be seen in these outfits, which he feels don't fit his style at all, he starts to get used to them and even enjoys wearing them... Because Mizuki always looks so happy and always tells him how cute and sexy he looks... He can't help but feel proud and excited.

So, when Mizuki finally goes for the catch and gets way too handsy when he's wearing those clothes, he hardly questions or resists the moment when Mizuki starts kissing him so intensely and touches his naked thighs, accentuated by the skimpy outfit he's wearing, nor when they pulls his panties aside to see his little pussy already so wet for his kouhai. Mizuki doesn't hold back anymore and takes the chance and fucks him good, leaving Tsukasa dizzy from the intensity and his tender hole full of cum 💛 He looks so cute like that, and Mizuki had already taken full advantage by taking countless pictures and videos of their senpai getting fucked while wearing such adorable outfits! And the idea of sharing those crosses images their mind... with Rui, who obviously has been crushing hard on Tsukasa all along, comes to their mind. They can't help but giggle as they imagine Rui's expression changing to one of pure shock at the sight of his beloved being snatched by Mizuki. Will he be sad or angry? Mizuki wonders as she snuggles up to the overwhelmed Tsukasa, who's knocked out by this point, still shivering yet satisfied.
Whatever will happen in the end, Mizuki is not against trying to convince Rui about sharing~

Ah, the scent of forbidden love between two brothers... Or in this case, more like one-sided obsession by our adored freak, Rui. That kind of vibe is why I love JohnWen ritk a lot, and anon, idk if you we're going for that au while writing that idea, but I love them too much so I'll use them for this scenario.

Rui knows he's been in love with his beloved older brother for quite a while, yet he's been holding back from actually acting on those instincts, too afraid to taint his relationship with Tsukasa, and Tsukasa himself with those dirty, forbidden feelings.

Naturally, it gets harder and harder to control them as time goes by, his love and obsession only growing despite his best efforts to bury and hide them, and the straw that breaks the camel's back is the day Rui "accidentally" goes into the bathroom while Tsukasa is having a bath, and he finds his brother's used clothes hanging next to the door, his eyes immediately fixating on some cute white panties with frills and a little bow on the front. A dangerous thought flashes through his mind, and before he can't find the strength to resist it, those panties are already in his hands and he's running for dear life to his own room, locking himself in it once he's inside.

His breaths are quick and his face is red, not only from the adrenaline, but from knowing that in his trembling, sweaty hands it's something so intimate and precious, and that it belongs to his dear Tsukasa. It feels wrong, but the hormones in his teenage body don't care as he takes a sniff and immediately gets drunk on the smell of his brother's fresh scent. He can only imagine that delicate, tender pussy brushing against the soft cloth on his nose and it makes Rui get so damn hard. He's pumping his erection into his fist like mad and comes again and again with only the lovely smell of Tsukasa's body, and even if he feels so guilty after he finishes his reckless session, he keeps those panties for himself in his own room and uses them for countless times in the future. Poor Tsukasa will never know where his panties went after that bath...

PD: So sorry for the delay in a response. 😭😭😭

...I know who you are. Anyways, in case you aren't who I think, everyone must know I absolutely ADORE Toukasa noncon, they truly made my mind function differently after I first drew them for the nsfw week. And what I love the most is how unique their fucked-up dynamic would be. I really can't see Touya being aggressive and rash with his personality, but if we just keep his canon personality and take his admiration for Tsukasa to the next level, we get Yandere Touya, the creator of gentle rape, and that is simply... NGGHHHGGGHGG MWAH!!! I LOVE IT!

He would invite Tsukasa over to his house, and Tsukasa would think nothing of it, oblivious to the fact that he will never get out of there! Touya would sedate him with a drink and take him to a room he had prepared especially for his beloved senpai, where he would live from now on, full of the things he loves, but also, he has to maintain him being obedient and docile, so he's tied up and chained!! Tsukasa then wakes up to his kouhai fingering his little virgin pussy on a bed where he's half naked and spread out, lots of lube being poured in between his legs that make the squelching of his fingers thrust oh, so obscene to his ears.
He would trash and squirm and try to yell through his gag asking what is Touya doing, or even if he's okay because his inofensive kouhai would never do this. Touya cooes and shushes him. He's a little nervous seeing his senpai like that, but he starts thinking that maybe it was because Tsukasa just felt so good that he didn't know how to express it, so Touya kept moving his fingers in and out, deeper and deeper, faster and faster. Tsukasa would scream louder, but also moan from the forced pleasure his body is receiving, never having felt anything like this before, until he can't hold himself back anymore and comes, his thighs twitching and soaking wet with his own bodily fluids at the end. Touya stands still and kisses his senpai's soft temple, though covered in tears and sweat, and whispers to him that they can continue now, to finally be one.

Needless to say, Touya fucks Tsukasa thoroughly and relentlessly. After years of pent up, one sided feelings, he completely relishes again and again in the sweet sensation of taking his adorable senpai and having him all for himself... forever.

Absolutely scrumptious. If you have been following me for a while you should already know that I have a fixation on Tanuki Kasa, so that fucker will have all his holes obliterated once I pronounce the command, but the time is not there yet. Let me talk about youkai Kasa as a whole (like, the three in one).

One idea I really like for this prompt is Rui tricking youkai Tsukasa into making a deal with him to work for him. It would be the first time Tsukasa makes a contract with a human and even though he shows a tough face and attitude, he's really naive, and doesn't realize the way he has just sealed his future with darkness. The fine print is, that Rui's control over the human-looking youkai is practically unlimited, and with each thing he says, no matter if Tsukasa's mind disagrees, he'll have to do it. So it comes as no surprise to Rui that one time when they were alone in the woods at night, the turn of Tsukasa's usually confident a cocky expression into an horrified face as he realizes he can't move away when Rui decides to give him the "stay in place" command out of nowhere, which thanks to the contract, Tsukasa can't do anything but automatically obey in spite of himself, and that allows Rui to grope and fondle him all over, chuckling against Tsukasa's ear and biting his lobe asserting his dominance over the powerful spirit who had been his loyal companion until now.

"I thought youkais were smarter than this..." He mumbles as he strips the blond of his clothes and his dignity, and as much as Tsukasa screams and growls, he can't do anything to get out of the situation he's recklessly gotten himself into. Rui ends up fucking him against a tree, pounding him mercilessly from behind and enjoying how the youkai's screams turn into cries of shame and pleasure as he fills his pussy to the brim over and over.

If only our young youkaikasa had been a bit brighter...

😭😭😭 Oh God that was a delight to read, AND THE PLOT TWIST!! I LOVE THIS IDEA!
NGhshshshs only Rui would be unhinged and obsessed enough to make a complex plan to get that star for himself and only Tsukasa would dumb and trusting enough to believe him... And to take everything his savior gives him, nonetheless! I absolutely love the idea of Tsukasa obeying to Rui as if he was a God, thanking him for every little bit of attention, even if it hurts.

In my case, I've always been unhinged, but Tsukasa just takes the worst in me, not that is a bad thing... It took me out from years of art and writing block!

And yes I fucking agree, who wouldn't faint from that big dick, Tsukasa is so lucky, I hope he enjoyed it thoroughly! Rui will be sweet enough to take care of him after he passes out and will pamper him when he wakes up to make up for it, I'm sure of that!

To get MS Rui and little Tsuka in the mix together only leads to one single result~

First of all, let me thank you for enjoying my fic, it really means a lot to me since fanfics take even more time than drawings to me! And yeah, I've thought about something similar in that universe hehe, there's so much one can do with hypnosis. Now let's see what can I flesh out of both of these excellent ideas.

//cw: underage, shota, age gap

It's easy for Tsukasa to accept staying with the neighbor's son while the parents are away, and more than easy, he's eager to spend all that time with Rui-niisan because he's so much fun!

Rui has taken care of Tsukasa several times before, so Tsukasa really trusts him, and especially loves the way Rui tells him stories or plays with Tsukasa, putting on little shows together, and that's not even mentioning Rui's workshop, full of so many toys and inventions, a wonderland for a kid like Tsukasa. And to be able to enjoy it for such a long time?! It's a dream come true! No more "Tsukasa, come home" from his parents interrupting their fun, he'll practically live with his beloved Rui-niisan!

Tsukasa has never questioned the way Rui touches him, after all, Rui is his friend and he likes him too much. He always pats his head with his big rough hands or tickles his belly to make him laugh... He also tends to stroke Tsukasa's chubby, squishy cheeks, small shoulders, thin arms and legs when they're watching cartoons together. It makes Tsukasa feel relaxed and very good, but something feels different when on the first day of his stay, while Tsukasa is distracted by the colors on the TV, Rui slides his hand lower than his stomach, something he had never done before. The little blonde can't help but whimper in surprise.

"R-Rui-nii-" He is cut off by the hand sliding under his shorts and underwear, Rui's fingers now in direct contact with his hairless, unblemished sex, stroking the wetness in a gentle back and forth motion.

"Shhh... It feels good, doesn't it, Tsukasa-kun?" Rui's voice is deep and raspy, as if he's barely containing something within himself, making Tsukasa shudder along with the sensation his onii-san is giving him. And he's right, it does feel good. The little boy grinds his hips unconsciously, searching for more of that new and nice sensation that he's quickly beginning to accept, after all, it's from his friend Rui.

After a while of this, Tsukasa has his first orgasm, dry and quick because he is so sensitive and so young, his body still undeveloped, and the expression in Rui's face is one of absolute delight. He showers the little boy in praise and caresses, and Tsukasa feels so warm inside that he wants to do this again, the cartoons on TV already forgotten. And Rui will take advantage of that for this next week.

I wanted to write more but I might as well write a fanfic instead 😭 And we still have to discuss the hypnosis's idea!

I bet Tsukasa would be so confused, feeling his body all warm and tingly at sudden intervals, and he would get hornier more and more often, making him feel ashamed of himself and try to deal with it by overworking himself to avoid those thoughts and feelings. That doesn't work since for some reason, whenever he's close to Rui his body reacts by itself. And oh, Rui would absolutely notice it and take advantage of that, giving him the confidence to maybe one day, fuck Tsukasa without hypnosis. He will never get tired of taking and taking from Tsukasa. 💕

SORRY I JUST NOTICED THIS! Maybe I should start using retrospring more!
Anyways dear anon, let's get to the point! I HAVE A WHOLE AU OF PRESENT 🎈🌟 MEETING MIDDLE SCHOOL 🎈🌟 so I have already foreseen how their introductions and relationship would go...

Guess this is where I put the warnings, because you'll hardly see anything healthy here 😭

//Non-con mentions

The moment Rui meets that small blonde boy, it's hard not to recognize him immediately as Tsukasa. The baby face, those big sunset eyes, the peach colored tips of his hair... But somehow, he doesn't really feel like the Tsukasa he knows. It must make sense, since this is the past (here Rui has traveled to the past using a time machine), but still, seeing Tsukasa with this aura of quietness and affliction, almost solemn, it's quite the shock for Rui. The boy is wearing a black gakuran, which doesn't match with the white, clear colored outfits Rui is used to seeing Tsukasa in, which matches his bright personality. Rui never holds his curiosity back, and after s bit of contemplating, he strikes up a conversation with this new Tsukasa. At first, Tsukasa is surprised to see this stranger approaching him like that, but he quickly warms up to him as Rui touches on every topic he knows Tsukasa would be interested in, all while maintaining an incredibly friendly and charming personality.

Rui ends up being enchanted by this Tsukasa, way too enchanted. He is clearly just... so innocent, so soft, even though he's just as loud and stubborn like his own Tsukasa, this one just seems... so vulnerable. With arrangements to meet again, Rui tries to get closer to this younger Tsukasa, and Tsukasa is happy about it, feeling like he finally has a friend who understands him, who can make his dream come true. But Rui's mind never stops telling him to take advantage of him, to abuse him, even when they talk about something as innocent as their favorite plays or the shows they'd like to perform in. Only time will tell if Rui can repress this side of himself that even he finds repulsive.