Shido's bedroom.

"Request. Please claim Yuzuru's anal virginity."

After covering Kaguya with a blanket and settling her in the Spirit bedroom, Yuzuru got on all fours and turned around, spreading her butt so that he could see her pink asshole.

"Whoa, easy there. Why are you suggesting such a thing?" Shido was genuinely shocked by this sudden request. He knew that Yuzuru had learned multiple lewd plays from Origami, but he didn't expect her to go this far.

"Assurance. Yuzuru has washed the butthole thoroughly inside and out, so no need to worry." Yuzuru turned her head with a lusty expression.

"It's not that I'm worrying about," Shido almost chuckled at the lewd girl's concerns, but he was more focused on one thing, "I'm worrying that you might be pushing yourself too far because of Origami."

"Confession. Origami has never taught this, Yuzuru wants to do it."

Yuzuru sat up and turned around, looking Shido in the eyes seriously.

"Reveal. Ever since Miku has done it with Shido, she will always be No.1, and Yuzuru will always be No.2."

Although she had always mentioned that she had no problem with Shido having a polygamous relationship, she couldn't help it when she heard that someone else successfully seduced Shido.

Truthfully speaking, Yuzuru was slightly jealous of Miku when she heard that she had claimed Shido's first time. After all, even Origami didn't make Shido lose his sanity and become a monkey in heat. In addition, she felt remorseful for her master, since she had always wanted to be the first woman to become one with Shido.

As of now, more and more girls had done the deed with Shido, and she, on the other hand, didn't feel so special anymore. Therefore, she wanted to be first in something creative, and to her joy, she learned from Origami that he had never done anal before.

If she had him fuck her in the ass, she would be No.1 in having all her holes claimed!

Now that Yuzuru had explained everything, she felt her face turning hot, probably due to embarrassment, which was surprising since she usually had no shame like her master. She turned around with her hands covering her red face, nervously awaiting his answer.

Shido took a deep breath, still surprised by the new side of Yuzuru. He felt blessed to have gotten so many wonderful girls, not to mention learning new things about them every once in a while. If she had confessed something personal, he must respond in a proper way…

"Alright, Yuzuru. I understand fully." Shido nodded with a smile. "You are a wonderful girl, voicing out your wishes straightforwardly."

"Gratitude. Thank you, Shido." Yuzuru was relieved, her hands sliding slightly apart to reveal her blushed face. It made Shido's heart skip a beat, so much cuteness.

"However…"Shido suddenly changed his tone, which made Yuzuru nervous again, "I don't like the idea of doing it in the ass, so I will pass."

Yuzuru was silent for a moment, then she smiled sadly.

"...Acceptance. If Shido is not for it, Yuzuru won't force it."

Shido was not surprised, for he knew that Yuzuru was always an understanding girl. She only wanted the best for him, always putting his needs in priority. It touched his heart for a few seconds.

"But are you sure? You are still technically my master, you know?" Shido then asked. "You can order me to do it instead of asking."

"Negative. Yuzuru won't ask anything that Shido dislikes." Yuzuru shook her head firmly, then she said softly. "Yuzuru would rather ...be ordered around..."

What an amazing girl… Shido thought to himself. He anticipated such an answer, so he smirked and said. "I see, you aren't really the type to be masters, are you?"

Yuzuru nodded in silence, looking at Shido with a needy look, as if implying him to do something.

Receiving the results he wanted, Shido revealed his plan by asking:

"In this case, how about I make you special — by turning you into my personal sex slave?"

Surprised by the sudden proposal, Yuzuru covered her mouth in shock, but her body felt itchy in the lower part, as if anticipating something.

"If you accept, you will always be known as my personal sex slave~" Shido added more ammunition in this attack. "Just think about it, the busty twin who always teases Kaguya - is actually the more submissive and masochistic one in bed~ !"

Those words really made Yuzuru turn on, as she got wet at hearing that and started touching her clit in lust. Then, surprisingly, she reached under Shido's book and took out a box, opening the lid and taking out the items inside.

There was a leash, two nipple clamps, a mouth ball, a blindfold, and a handcuff.

She prostrated fully in front of Shido, asking in an earnest tone.

"Gratitude. Please make Yuzuru your personal sex slave, and mark Yuzuru as yours with those training tools!"

As it turned out, she had prepared those items for more S-M plays, but she never expected Shido to actually pull a reverse uno on her so quickly. Nevertheless, this only made her happier.

Shido was completely flabbergasted when he witnessed such an erotic scene, probably more shocking than any play that he had done before. He thought his plan was a genius one, you know, stuff about a good hunter disguising as a prey, and he did surprise Kaguya a little earlier. However, Yuzuru's vigorous move was just a critical hit!

Yuzuru rested her head against the quilt, awaiting her soon-to-be-master's orders.

After taking a few deep breaths, Shido finally obliged.

"Alright, from now on, you are my personal sex slave, Yuzuru!"

With that, he attached the leash to Yuzuru's slender neck, marking her his from now on. Then, he slided the mouth ball into Yuzuru's sexy mouth, sealing her ability to speak. Next, he wrapped the blindfold around Yuzur's pretty eyes, blocking her sense of sight. Finally, he put the nipple clamps on her hard pink nipples, along with the "sex slave" tag on them!

Yuzuru felt her entire body was being dominated by her new master, ultimate pleasure derived from losing her speech and sense of sight, along with the electronic bolt feelings from her sensitive nipples. Even with these, something was missing.

"Mmm… Mmmm… Mmmm…" She made muffled sounds, as if trying to speak, but wasn't able to due to the object in her mouth.

"What's wrong, Yuzuru?" Shido asked in concern, taking the mouth ball off Yuzuru.

"Reminder. Master forgot to handcuff Yuzuru." Yuzuru put her delicate hands behind her back.

"No, that will hurt your wrists." Shido shook his head.

"Sighing. Master is too kind, despite the obscene proposal from earlier." Although she had a blindfold on, a mixture of disappointment and affection was clearly displayed on her face. "But Yuzuru is a Spirit, so this handcuff is nothing."

After that, she suddenly grabbed Shido's dick and bit on the tip. Although she didn't apply much force, it still hurt a lot!

"Aww! What was that for?" Shido cried.

"Mockery. Master is so pathetic, can't even train his sex slave right." Yuzuru pouted as she bit him again, causing him to step back. "Provocation. Your bitch is so undisciplined, don't you think she needs a lesson?"

Acknowledging her advice, he grabbed both of Yuzuru's hands and put them behind her back, before handcuffing her forcibly. Even so, she ridiculed him by poking her tongue out.

Wasting no time, he grabbed her hair roughly before slapping her cheeks with his dick! Yuzuru couldn't see at all, so she could only kneel as she was being degraded by her master.

"You bitch, I will make you….!" Shido enjoyed the sensation of dominating her, but suddenly, he stopped as he realized something. "Sorry… I just called you…"

Sighing in annoyance, Yuzuru bit on Shido's dick for the third time!

Crying in pain, Shido backed off and tried to soothe his dick —

"Pride. Bitch Yuzuru is really good at biting~"

Yuzuru stood with her chest up, swaying her melons left to right with nipple clamps attached. Despite the fact that she couldn't see and had her hands cuffed behind her back, not to mention a leash attached to her neck, she acted as if she was the one in control, which was totally a taboo for a sex slave.

At this point, Shido finally understood Yuzuru's message: No mercy on her!

As if reborn as a new man, Shido grabbed the end of the leash and pulled it forcibly, making Yuzuru stumble forward. Then, he grabbed her head and slammed her down on her knees, shoving his dick inside her throat deeply! Feeling the wonderful hotness and wetness of her mouth, Shido held back her gratifying moans, as if fearing that he would show her his weakness.

Yuzuru performed her fellatio for him actively. Although her master's shaft reached the back of her throat, she still skillfully licked the root of it with her tongue.

"Bitch, you like your master's lollipop?"

Shido asked.

"Mmm…Mmph…."

Yuzuru muffled her moans, as her unreasonable master blocked her mouth.

"Answer me, you slut!"

He continued shoving his cock inside her lewd mouth, and yelled in an annoyed tone.

"Mmph…Mmph…"

Yuzuru shook her breasts, but that only annoyed him more.

"You seem very proud of those damn tits, whore!"

Shido grabbed Yuzuru's nipple clamps and pulled on them harshly.

"Mmmmmmmmm~~"

Yuzuru's body started trembling, not sure if she was enjoying it or feeling pain.

Seeing her like this, Shido almost stopped, but reminiscing the lessons from earlier, he decided not to.

Even so, he only kept at it for two or three seconds, before letting go of her tormented nipples and withdrawing his dick from her mouth. He took off her blindfold and inspected her conditions.

Coughing as she recovered her breath, Yuzuru uttered:

"Happiness. Yuzuru …. prefers to be a sex slave … than a master."

She looked up at Shido, affection and admiration clearly shown in her eyes. It seemed that she enjoyed how he manhandled her earlier. Even so, he felt that he needed to set up boundaries.

"Hey, say the code 'red red red' if it's too much for you." He scratched his cheek while looking away, then he continued. "If your mouth is blocked by something, moan three times in a row, and I will know."

This time, Yuzuru didn't show any sign of annoyance. Rather, she was touched that he had considered so much for her. He really was a benevolent master.

Therefore, she nodded with a smile.

After getting his message across, Shido smiled back, and as he stepped forward —

Smack!

He slapped Yuzuru's face with his hand, making her cheeks slightly red.

Yuzuru gasped in surprise, but she didn't protest, simply staring at Shido.

"Do you know why I slapped you?"

Despite feeling guilty, Shido still asked coldly.

"Negative. Why, master?"

Yuzuru asked blankly. She didn't say the code from earlier, meaning this act was okay.

"You spoke without permission, slave." Shido spoke as he slapped her other cheek. "Don't you know better than that?"

"Explanation. Yuzuru didn't…" Yuzuru tried to protest, only to be pulled up by the neck as Shido pulled the leash. While her speech was interrupted, she froze as her master pressed his forehead against hers, staring at her with deadly eyes. "Don't talk back to me, bitch!"

Yuzuru felt a chill down her spine, but to her surprise, she was enjoying this sensation.

Shido reached his hand toward her private parts, rubbing his fingers against her slick pussy, only to find that she was soaking wet! He smirked as he cupped Yuzuru's chin with his wet fingers, rubbing her cheeks softly and tainting her face, as if implying something.

However, Yuzuru learned from the earlier lessons, so she kept her mouth shut.

"Good girl, I will reward you~"

Shido smiled warmly and kissed Yuzuru, forcing her lips open as he dominated her tongue. In addition, he stroked her clit, burying two digits of his fingers inside her tight walls.

Yuzuru happily kissed him back as her hot moans muffled. Nothing was better than being praised and rewarded by her master.

After a minute, he pulled away from his sex slave, a silver string of saliva connecting their lips.

"Delight. The kiss was so good…" Yuzuru moaned dreamily as she pressed her face against Shido's. "And Master's fingers felt like heaven…."

"That is true, except…" Shido smirked proudly, but then, he pushed Yuzuru down violently, making her lay down on her back, and yelled while looking down on her. "Did you forget my rules just now?!"

Realizing the mistake that she had made, Yuzuru nodded with puppy eyes, as if begging for mercy.

"Good," Shido said coldly, "tell me how I should punish you. If you can't give me a satisfying answer, I will punish Kaguya instead."

"Shock. But Kaguya…"

"I said no talking back!"

Shido kicked Yuzuru's model body, making the sex slave groan.

Yuzuru became silent, not willing to speak.

"Seems like you are still undisciplined." Shido spread her legs, put the blindfold back on her beautiful eyes, before aiming his tool against her flooding entrance. "I'm gonna fuck you up!"

With that, he slammed himself inside her hot pussy, making her spasm and shudder against the sheets in the hottest, most erotic way possible.

All whilst she retained her ladylike grace. Not a swear nor a curse slipped free from her lips despite the unprecedented intense sex he was giving her – but if anything that only encouraged him to be as vigorous as possible, as passionate as possible; his lips attacking her neck with a flurry of sucks, marring her perfect, unblemished skin with numerous hickeys her sister would no doubt notice. Yuzuru whimpered, but swore she did not, her grace unfading even as he turned her into a hot, sweaty mess.

"If you don't give me an answer after I cum, Kaguya will pay the price."

Shido purred, blowing hot steam air against her sensitive ears.

After getting her to nod, Shido kissed Yuzuru while groping her alluring melons, pulling on her nipples occasionally. His lower body's action didn't slow down, however, as he pushed himself with frantic haste, making her breathing quick and her moans hearty, every exhale laden with a lilted tone. The sound of their flesh smacking together echoed in the bedroom, fortunately that Kaguya was sleeping in the other one.

And then his orgasm hit; a hot rush shooting down his cock – before with a shout, he busted his load inside of Yuzuru. ''Ha - mnn!''

Shido cried out – a sharp, trembling pitch as his warmth flooded her depths, every spurt squeezed out by her clenching insides and mixing with her own honey as she came, back arching erotically as she took the creampie, squeezing out as much of his cum load as she could.

Until with a tight, relieved sigh Shido rocked his hips back and pulled out, the tip springing free – twitching and sensitive, but still erect.

Yuzuru whimpered as she felt him pressing his cock against her cheeks. The meaning couldn't be more obvious. Therefore, she stuck out her tongue to lick it.

Shido nodded contentedly as he enjoyed her cleanup blowjob, one hand fondling her erotic tits in the process. He didn't stay like this for long, however, as he stood up and asked her coldly:

"What kind of punishments have you thought of for yourself, slave?"

"Submission. Please …. step on Yuzuru's slutty body….without holding back…."

Yuzuru squirmed against the bedsheets, her tone trembling.

"Continuation. If …. that's not enough…. make Yuzuru lick your feet."

Shido was amazed that she could come up with those lewd ideas. He decided that this should be enough, however, a part of him wanted to bully her more.

"I see, I see. Very good ideas." He praised her lightly, and before she could feel relieved, he questioned. "But you licked my asshole earlier, didn't you? Do you believe that licking my feet is worse than licking my ass?"

His thinking was not unreasonable, despite what Yuzuru had in mind.

"Apology. Yuzuru is too dumb…" She became teary eyed.

"However," Shido stepped on Yuzuru's toned stomach, making her yelp, "I do like the idea of stepping on you." With that, he rubbed his foot against her belly some more.

"Gratitude. Please step on Yuzuru some more…." She moaned as she embraced her punishment.

Feeling Yuzuru's soft and smooth skin, Shido couldn't help but praise her body. He had never done anything like this, and he felt a bit nervous doing it to his lover. But after she had made it clear that any play was okay, he decided to follow his heart and not hold back anymore.

Then, he stepped on Yuzuru's erotic tits, pressing her squishy melons flat!

"Mmm~ Master…" She felt her breasts being stomped on, and she enjoyed the sensation. It was humiliating, but coming from Shido, her master, it was the ultimate pleasure.

He stopped for a second, then he sat down on her belly. Next, he put both his feet on her gigantic breasts, rubbing both of her soft mounds in enjoyment. He purposely opened the gaps of his toes and seized her nipple clamps, before pulling on them actively.

After a while, Shido put one foot toward her face, rubbing his toes against her mouth. To which, she opened her sexy lips and licked them, as if tasting his dick.

Feeling her hot mouth delivering heat to his toes, Shido enjoyed it utterly. He didn't actually expect her to lick his toes, but since she suggested it, he would go along with it.

To reward her for being such a good slave, he pinched her clit and started jerking her off again!

Yuzuru felt completely dominated as her upper mouth and lower mouth were being pleasured so much, and she could feel her orgasmic high boiling closer and closer. In sensitivity, she became no less than Kaguya due to this S-M training, after all, her sense of sight was blocked, increasing her pleasure immensely.

When he had enjoyed enough, he pulled away his feet, leaving her pussy empty. She tried to ask for his touch, but kept her mouth shut due to obvious reasons.

Seeing what was up with her, Shido smirked proudly. He decided to do something that he had planned since the beginning.

He helped her up to her feet, much to her confusion.

"You have become a very good sex slave, so I will give you the ultimate reward." He spoke gently as he caressed her cheeks. "It's something that you have always wanted."

Then, he put the mouth ball in her mouth.

With that, she was standing while being blindfolded, gagged, and handcuffed.

"Spread your legs." He purred to her ears.

Yuzuru obeyed quietly.

To her surprise, he put his fingers inside briefly, and then he pulled out.

To answer her question, he rubbed his wet fingers against her asshole.

"Mmm~" She realized something, but due to the mouth ball, only drools came out of her lips.

Shido pressed the tip of his dick against Yuzuru's asshole – and pushed inside!

The mere sensation made her gasp and melt into the quilts, eyes wide as her final hole was slowly penetrated. The thickness of her master's cock only made it more pleasurable, their mixed fluids helping ease him inside her ass.

''A-Argh...'' Yuzuru shuddered as Shido pressed himself flush against her back.

Low chuckles answered her – before he began to move. Yuzuru gasped and writhed, pure pleasure shooting through her pelvis as he speared his thick cock inside her asshole, his slow thrusts made infinitely more pleasurable by how sensitive she was. She could intimately feel every thrust; his dicks moving around her insides and melting her mind, all other thoughts leaving her as she gladly gave into the orgasmic pleasure.

Soon however Shido began to pick up speed. Pleasure turned to ecstasy and Yuzuru could do nothing but gasp and moan, her legs nearly limp until her leash was pulled, maintaining her stand. Her breasts bounced in the air until her master reached around and roughly began groping them, forcing a slew of lustful moans from her throat as she was pleasured so intensely.

'Lament...H-How have I... been missing this... f-for so long?!' Yuzuru cried out in her mind, rocking her hips in tandem with Shido's thrusts.

''M-Mmph?!'' Yuzuru moaned in surprise as Shido suddenly dug his finger inside her pussy, then two, and then three….

The sex slave happily enjoyed it.

Skin smacked against skin as Shido bottomed out inside her, his pelvis slapping her ass in tandem with her reciprocation. The lewd sound further melted Yuzuru's mind and she unashamedly began to moan whorishly, tensed her muscles and tightened around his shaft, smirking lightly when she heard him groan.

However, he immediately paid her back by slamming his cock into her faster, jack-hammering her asshole with swift bucks of his hips, filling her hole to the brim with his cock!

''I love you.'' He purred into her neck, sliding one arm under her lower stomach and pulling her against him more.

Surprised by the sudden turn of events, Yuzuru could only wail as she enjoyed the ultimate happiness a woman could experience in sex.

Yuzuru showed an ahegao expression on her slutty face, drools dripping down her mouth as they fell on the bed. Her breasts bounced in his hands as he fondled her, her nipple clamps attached to her nipples were swinging strongly, until they were seized by his firm hands and pulled on, her mind melting and melting as her orgasm bubbled stronger inside her filled pussy – her limit rapidly approaching.

"H-Hmmmmmmmm~"

With a loud squeal of pleasure Yuzuru finally hit orgasm, spasming as she climaxed on his dick.

The way she suddenly tightened around his cock also pushed him to his limits, groans escaping the master as he fucked her hole harder – until he unloaded his balls inside her asshole, thick ropes of hot cum splattering inside her and melting her mind.

''A-Ah...'' Yuzuru's wail dissolved into a pleasurable whimper, twitching as her Master slowly pulled out of her ass.

Shido freed her hands from the handcuff, before taking off the leash, blindfold, and the mouth ball. He even took off the nipple clamps around her sensitive tits so that her body could take a break from the intense training.

"Gratitude. Master, thank you for dominating all of Yuzuru's holes." Yuzuru rubbed the red marks left on her wrists briefly, before prostrating herself in front of him again. "Now Yuzuru has truly become a special sex slave, and will always be No.1 in this regard." While saying that, semen was leaking out of her pussy and asshole.

"Request. Please let Yuzuru clean Master's mighty tool."

Seeing how erotic she was in her scantily clad state, he couldn't resist the urge to step on her head or fuck her throat-pussy again.

However, he ran away and went to the restroom, washing his dick quickly.

He didn't want to force Yuzuru lick his dick clean, considering that it was just in her ass.

When he was done washing, he heard the door opening, and it was Yuzuru.

"You wanna take a shower? Go ahead." Shido stepped out quickly, but when he walked past Yuzuru —

"Eeeeek!"

His ass got poked!

Yuzuru performed "a thousand years of death" on him, and it was super painful!

"What was that for?" Shido groaned as he rubbed his ass.

"Complaint. Why didn't you let Yuzuru clean your dick earlier, Master? Also, why didn't you step on Yuzuru's head?"

As it turned out, she was disgruntled about the fact that Shido became soft on her at the end.

"Huh? It was over, and I didn't want to make you..." Shido tried to reason with her, but was pushed against the tile wall.

"Declaration. Master has no dirty spots, and even if there is one, Yuzuru will clean it with her tongue."

With that, she walked out of the restroom.

Shido could only groan as he pressed his head against the cold tile wall, wondering what he should do with this new thirsty sex slave of his. She was almost insatiable, quite outrageous of her to defy her master like this!

What had he gotten himself into?

…

A/N:

Yuzuru and Kaguya always wear those restraint Astral Dresses, implying that they might be into S-M plays. I just can't help it but take it to the next step ~