Chapter

'I know where this is going.', thought Keiki while walking towards the school's rooftop. The lessons were all finished and every student had to go home or to each own club, but instead of doing one of the two, the purple haired boy had something else to do.

During the morning, he had found a letter from Yuika that asked him to meet her on the rooftop after the end of the lessons because she had something important to tell him privately. Having clear in his mind what the situation meant, he had to text his girlfriend and pet that he would meet her later than usual because he had something to do first, getting various sad puppy emoticons in return that made him smile.

In fact, ever since he confessed his feelings to Sayuki and revealed his sadistic side to her, the two of them were now a couple, especially following the ecchi things they did. Though, none of his friends and neither Mizuha knew about the newborn couple, but it looked like that his kohai wanted to confess her feelings for him.

So, reaching the door to the rooftop, he opened it and could already see the little blondie waiting neat the metal fence. "Hehe, you arrived, Keiki-senpai.", she told him, giggling and blushing.

"Well, you said that you had something important to tell me. What is it, Yuika-chan?", he said instead, smiling as well.

Blushing more, the girl walked closer towards him and asked, "Keiki-senpai, do you remember how we became friends?"

"Of course I do. I always saw you reading a book alone in the library, without interacting with anybody. You made me curious and I tried to befriend you often, even if you ignored me at first."

"Hehe, you were annoying, but in the end I opened up with you and we became friends. But over the time, I ended up getting more affectionate to you, to the point that I fell in love. Yeah, I love you Keiki-senpai. Please, go out with me!", she told him nervously, blushing more too.

As he guessed, the young girl wanted to confess her feelings for him. Still, he had already someone of special in his heart. "Sorry, Yuika-chan, but I love another woman.", he said, frowning.

"Ehhh?! No way! You mean to tell me that Witch-senpai seduced you?!", was Yuika's reaction at his reply, getting angry and looking at him annoyingly.

Blushing and scratching the back of his head, he said, "Well, I can tell you that she and I are a couple now."

"Noooo! This is not fair! You're the prince that was supposed to be my slave too mouu!", she exclaimed, pouting and beating her hands on him like an angry kid.

"Huh? Slave? So you're a sadist? Hahaha, I found another sadist like me.", he said, laughing amused.

"Ehh? Like you?", she mumbled, stopping to beat her fists and glancing at him with a surprised look.

"Yep, I'm a good guy but I have a sadistic side too. The only person to whom I showed it is Sayuki, since she's a pervert like you but a masochist.", he explained, patting the girl's head.

"She's a m-masochist?"

"Yeah, and to be honest, I had feelings for her since some time. Though, if I had fallen for you instead, I would have accepted your feelings now and made out with you immediately~.", he whispered in her ear, making her blush profusely.

"Ehhh?!", was her further reaction, accompanied by widened eyes while she stepped back from him.

"Yuika-chan is really cute when she's flustered.", he told her, smirking amused.

"Keiki-senpai, you idiot!", she exclaimed before running to leave out of embarrassment. The young man simply watched her leaving, chuckling at her behavior.

She surely surprised him by saying that she wanted him to be her boyfriend and slave, but he didn't like being ordered around at all; he wanted to have control and his way with his girlfriend, so if he had fallen in love with Yuika instead of Sayuki, he would done the same things he did with the hazel eyes girl to the blondie too.

Still, the things went as they went, so now that he finished what he had to do, he didn't waste time and left the rooftop to reach the writing club's room. After some corridors, he was in front of the door and opened it, widening his eyes at finding his dear Sayuki dressed as a maid and with handcuffs on her wrists.

"Welcome back, Goshujin-sama~.", she told him, blushing and smiling.

"Oh, what do I have here? A maid with her hands tied~? You look fantastic, Sayuki~.", he said, blushing too and grinning while walking towards her.

"Hehe, I wanted to make a surprise for you after all~. Making my owner happy is my pleasure as your loyal pet~.", she said, giggling.

"In that case, you deserve a reward~."

Not hesitating, the boy planted his lips on hers and began to kiss her, making her moan while she kissed him back gladly. Each time her lips connected with his, she would feel in total bliss. But her moans increased in numbers once he started to grope her breasts, playing with them and teasing her nipples under her maid clothes.

'Ahh~. I feel so good with Keiki-kun's hands playing with my tits~.', she thought, squirming and getting a little wet inside her panties. Suddenly, her master pulled down the piece of cloth that covered her breasts and started to lick and suck them, increasing the amount of moans that escaped from her mouth.

"Your breasts are big and naughty, Sayuki~. They make me want to suck them for good each time I see them~.", he told her, smirking and sucking on her left nipple.

"Ahn~! Ahn~! Knowing that you love them so much makes me overjoyed~!", she told him, smiling and squirming while her eyes were full of love.

"Don't forget that I will take you on a date this week, so look forward to it~. Meanwhile, we will have some fun~."

After saying that, he gently pushed her on the floor and made her spread her legs before pulling down her panties. The beautiful masochist blushed deeper at that ending up to moan loudly when he didn't waste time to start licking her wet cunt.

Using his fingers to spread it open, Keiki ate her pussy up without holding back, enjoying her juices and her continuous moans. "Ahn~! Ahn~! Ahn~! Goshujin-sama, this is wonderful~!"

"A good owner must give lots of love to his lovely pet~. Besides, I like the way you look when I lick your pussy~.", he told her, exploring the insides of her womanhood with his tongue.

"Yes, give me all the love you want~!"

Keiki went on eating her pussy up until she came and released a lot of juices that he drank gladly. Her drooling and panting face after climaxing was a fantastic sight for his eyes, and since she was his dear pet, he got up briefly and took her collar to put it on her neck.

Taking also a permanent marker, he wrote "Keiki's dog" on it. "Good, this collar states that you're of my propriety from now on, which means that you belong totally and exclusively to me~.", he told her, grinning perversely.

"Hanf~, I belong to you ever since you accepted my feelings for you, Keiki-kun~. I don't want another owner that is not you~.", she told him, still panting and smiling at him.

"Very good, in this case I will have my way with you~. I closed the door with the key earlier, so no one will interrupt us~. But first, I have to do this~."

From his pants' left pocket, the sadistic boy took out a tissue and used it to cover her mouth, telling her that it was just a means to reduce the sound of her moans in order to not get found out by someone. Obviously, she liked the idea of being gagged like that, so she nodded happily and spread her legs to be ready.

"You're a very good dog~. Here's your next reward~.", he told her before taking his clothes off to remain naked, with his hard shaft in full sighy. Bringing his dick in front of her pussy, Keiki started to insert it slowly, liking how she squirmed during that and how her cunt tightened once his length was fully inside.

He then began to thrust his dick in and out of her cunt, fondling her breasts and liking how she moaned continuously. Her internal walls were so wet that his rod could thrust easily, prompting him to get hornier and to ravish her more eagerly.

"Ahh~. Your pussy is amazing, Sayuki~. It's like it doesn't want to let go of my dick~.", he told her, granting and grinning.

The cute masochist giggled between her moans, looking into his eyes with heart shaped pupils. The way he was fucking her and playing with her tits was absolutely fantastic, and she felt in total bliss to be the only one he would such things to.

'Goshujin-sama~! Goshujin-sama~! I love you so much, ahn~!', she thought in her mind, since she couldn't speak because of the tissue used as a gag on her mouth. Being ravished like that at school was something that a masochist like her adored very much, so she couldn't be happier at the moment.

Her owner decided to fuck her in doggy style then, so he grabbed her ass cheeks and pierced her wet cunt once again. He even spanked her ass sometimes, knowing that she loved it by judging her happy moans.

"You have to wear your collar every time you're alone with me from now on~. Got it~?", he whispered in her ear, nibbling it.

"Mmh~!", was her reply, followed by a loud moan because she reached her orgasm once again and released a lot of love juices that fell on the floor.

"Haha, I made you cum again, huh~? I didn't cum yet instead, so I will continue to ravish you to shoot inside of you~.", he told her, smirking.

Obviously, the girl nodded happily at his words and brought her ass near his still hard dick. Keiki put it inside another time and began to fondle her breasts while kissing her neck, focused only on giving a great amount of pleasure to his adorable pet.

Even if he was moved by how Yuika fell in love with him, he liked Sayuki since some time because of how kind and caring she was with him ever since he joined her club. There was also Mizuha that loved him, but as he already explained her, he could see her just as his sister and nothing else.

Besides, having a sadistic side, he would have his way with the little blondie if he was in love with her, as being a slave was something he didn't want to at all. He wanted to dominate and to mark his own girlfriend as his, so he was going to cum inside Sayuki's pussy for that. He had also something else in mind to do with her at night; something that she would adore a lot and that would make her love him even more.

An hour later, a drooling and panting Sayuki was on the floor with lots of pussy juices and semen coming out of her cunt, as her master gave her a creampie for real. He was laying next to her, stil grinning and liking the sight.

"Hanf~, Hanf~, Goshujin-sama marked me as his propriety~. I-I'm so happy~.", she said, panting and smiling in ahegao style.

"That's right, so no one can steal my beautiful girlfriend~. And since you made me feel so good, I have another reward for you~; something that we will do this night~.", he told her.

Her eyes widened at those words and her smile got happier. "S-something for this night? I can't wait for it, Keiki-kun~!", she told him, getting up to hug him and snuggle her face into his chest.

"I just like making my cute pet love me more and more everyday. Remember to put your collar too or I will spank your butt~."

"You can spank me even now, hehe.", she said, giggling while he chuckled and caressed her head. At this point, their club room became more the special room for their ecchi things and love making sessions rather the place where practicing writing. Of course they would practice that again, but it was likely that they were going to write things like "Sayuki loves Keiki" or "Keiki adores ravishing his pet".

Anyways, the two of them reluctantly stopped hugging and the boy used a towel to clean himself and her from the sweat. Though, his dear pet used her mouth to clean his dick up, making him grunt in pleasure and thanking her with a headpat that she adored.

Once he wore his clothes back, he gave her a hug and a kiss on the cheek before leaving, reminding her to meet him at night when he would send her a text and getting a happy "Of course, Goshujin-sama." as reply.

Following that, the young man left his school to return to home. As he stayed at school because of his private time with Sayuki, Shouma and Mao had already gone home. It wasn't like walking alone annoyed him; he could just relax by listening to some music with his earphones while doing that after all.

Though, his relax was about to get interrupted once he would be at home, since there was a brocon stepsister to welcome him back. 'I had to even close the door of the bathroom with a key to avoid that she joined me.', he thought, sighing at remembering such episode.

He loved her, but he could see her only as his sister and nothing more, especially because he had already a girlfriend. And that was why he decided that he had to tell her about it, so she would stop trying to seduce him uselessly.

So, after reaching his house and opening the main door, he said, "I'm back."

Immediately, a smiling Mizuha came out of the kitchen but with her clothes on instead of a swimsuit and an apron luckily. "Welcome back, Nii-san. You were at the writing club, right?", she asked him.

"Wel, I am member of it after all. Besides, I like spending my time with my girlfriend.", he replied, smiling.

His response caused her to drop the wooden spoon she had in her right hand on the floor. "W-What? You're telling me that-"

"Yep, Sayuki is my girlfriend and we kissed each other a lot.", he said, cutting her sentence off and making her gasp more.

"This is why you should stop trying to seduce me, Mizuha. I have already a girlfriend and I can't reciprocate your feelings."

Walking towards her, he placed a hand on her head and patted it. "But never forget that you will always be my dear sister, so don't think that I hate you, ok?"

To his surprise, she enveloped him in a hug and said, "W-why can't I be your girlfriend? It's not fair, I loved you ever since we were kids."

"I told you, I can't see you as something else other than a sister. But, You will always be my family anyways.", he told her, hugging her back and caressing her head.

The girl began to sniffle then, so he kept on hugging her until she didn't calm down like he was used to do when they were kids. It hurt him breaking her heart like that, but he loved Sayuki very much and didn't want to betray her. After all, he didn't reciprocate Yuika's feelings for the same reason.

When she seemed to have calmed down, her brother told her to take a nap in her room and that he would take care of dinner later, getting a nod from her. With still a sad expression on her face, Mizuha stopped hugging him and went upstairs towards her room, with Keiki frowning at seeing her like that.

'Rejecting two girls in a day really sucks. I hope to not have another girl in love with me or they will call me a heartbreaker for sure.', he thought, sighing and going to take a shower in the bathroom. Despite being a sadist, he cared about other people's feelings and couldn't stand seeing a relative or a friend sad.

Also, since he and the hazel eyes girl were a couple, he was going to do his best to be a good boyfriend and owner for her and to make her happy. And he was sure that fer feelings for him would get stronger after doing to her what he had planned for the night.

Only imagining her future moans was enough to make his dick hard, and since he was in the shower, he masturbated a little. Of course, getting blown by his dear pet was a thousand times better, as he loved how she happily sucked him while using her boobs to give him a titsjob as well.

He had kept his secret side hidden for so long, but now that he could show it freely to Sayuki, it felt great. Yuika was the other person he revealed it to, and teasing her and making her flushed like he did on the school's rooftop was really amusing.

Though, since he had his studies to care about too, he finished to masturbate and his shower before wearing a t-shirt and some pants and going to his room to do some homework. He wasn't the best student in his class, but his grades were always above the average and he never had to repeat an exam.

Mao and Shouma were pretty good at studying too, with the redhead being the best whenever it came to art and drawing. In fact, she was praised a lot for her drawings of a princess together her prince, blushing whenever someone made her compliments.

The purple haired boy didn't have a subject he was specialized in or something, as his main objective was to find a girlfriend during his high school life. Now that Sayuki was his girlfriend and his pet, he only looked forward at the various special moments he would spend with her. And the one at night later was going to be pretty awesome.

Following at least two good hours of studying and one of playing Resident Evil 2 Remake in hard mode on his PS4, Keiki exited from his room and went to the kitchen to start cooking something for dinner in advance. Usually it was Mizuha to cook for both of them, but as he learned to work in a kitchen as well, he would do his best to prepare a nice dinner for the two of them.

By cutting some vegetables, heating some meat and mixing other ingredients between them, he managed to make a dinner full of different dishes that looked very tasty. Then he went towards his sister's room and knocked while telling her that the food was ready, with Mizuha getting out and nodding to him while smiling sadly.

They began to eat when they were at the table and Keiki was glad to see that the food was enough to cheer up the girl. "Your cooking is really good, Nii-san. Thanks for the food.", she told him.

"I wanted to make you smile again, so I gave it my all. Don't be sad that I can't reciprocate your feelings anymore, ok? You're cuter when you're happy after all.", he told her, winking and grinning.

"Jeez, now I feel more jealous of Tokihara-senpai. I just hope she takes good care of you or I will get angry with her.", she said, frowning and blushing.

"Don't worry, she's being a very good girlfriend haha.", he assured her, chuckling. He couldn't tell her that he had sex with Sayuki earlier and even gave her a creampie, as he preferred to not talk about their sex sessions with anybody.

Anyways, the two siblings continued to eat and chat together until they were done, and since it was her brother that cooked this time, Mizuha offered to wash the dishes while he simply cleaned the table and went back to his room. Once there, he prepared a bag with some peculiar things to use with his pet later at night; things that he bought some time ago when he went to visit one of those famous sexy shops, making friends with the owner that was a fellow sadist.

Though, to not be found out by Mizuha, he had to leave when she was asleep later. In that way, he could meet Sayuki without any problem, as his girlfriend replied to his text earlier by saying that her parents weren't at home and that she could meet him at night freely. Even if she would do it anyways, since she didn't want to be disobedient towards her beloved owner.

Being done with preparing the bag, the young man decided to sleep already to be ready later; he was going to spend the whole night with his lovely pet and mixing sleeping hours wasn't good for anybody. In fact, he suggested to do the same to Sayuki, getting a winking puppy emoticon as reply on LINE.

So, following something like 6 hours of sleeping, Keiki woke up at midnight and got up to go to check that Mizuha was sleeping. Seeing that she was asleep, he took his bag and his phone and left the house to go to meet with Sayuki.

As it was midnight, there was no one around; what he and the beautiful masochist were about to do was what no one would normally do in front of other people after all. In fact, when he reached the designed point, the boy smirked and blushed at seeing the girl arriving all naked and with her collar on her neck.

"Going for a walk with my Goshujin-sama at night is a dream that comes true hehe.", she told him, smiling and blushing, with some droplets falling down from her pussy.

"Glad that you're ecstatic about this~. I've even brought some useful things for the occasion~."

After saying that, he pulled out from his bag a plug shaped like a dog tail, dog ears and a leash. At such sight, Sayuki's pupils turned immediately in hearts and she trembled in excitement.

First her owner put the dog ears in her head and attached the leash to the collar, then he made her turn around and put a finger in her butthole, making her squirm. She moaned louder when he began to insert the plug in her asshole, as it stretched it and went fully inside.

"Perfect. Sayuki, handshake~.", he said then. Immediately, the drooling masochist kneeled and gave him his hand just like a real dog.

"Wow~. Roll on your back~."

Laying on the ground, she rolled on her back, showing him her wet pussy like that. She even barked when he told her to do it and licked his hand affectionately, getting praised as a good girl with some headpats.

"Alright, let's go for a walk~."

"Woof~!", was her happy reply. So they started to walk together along the road, with Sayuki doing it like a dog, smiling and drooling blissfully. Her dream of being the loyal pet and girlfriend of a man that accepted her perverted side came finally true, and she was overjoyed that that man happened to be her dear kouhai.

He liked how caring she was with him and she loved how kind and helpful he was, without forgetting his sadistic side that she absolutely adored. Plus, he marked her by giving her a heavy creampie, so her heart and her body belonged exclusively to him; after all, a pet had to be loyal to its owner.

The couple walked through the neighborhood and eventually arrived to the park, where the boy decided to take out a small ball and threw it. Detaching the leash from her collar, he told the girl to go to take the ball, so she ran towards it and brought it back by taking it with her mouth.

"Good girl~. You make me love you more like this~.", he said, caressing her head and scratching her under her chin, which made her giggle.

She got also wetter when he unzipped his pants and told her to suck his dick, so she didn't waste time and took it all in her mouth. Using her breasts, she began to suck it and massage it, overjoyed at hearing and seeing her master grunt and smile in pleasure.

'I will make Goshujin-sama feel great and drink his semen~.', she thought, using her tongue to lick the tip and continuing to suck. She was already in constant pleasure due to the tail plug in her butthole, but giving him a blowjob and a titsjob made her always wetter. After all, he was going to put his penis inside her pussy then and she looked forward to be ravished by him.

Since her parents were out of the house due to work, she was going to spend the night with Keiki at her house too. In that way, he could fuck her both outside in the park they were at the moment and in her bedroom to cuddle then together. She also didn't forget that he would take her on a date, so she couldn't wait for it either. And obviously, the young man was excited about going out with her too.

No one at school knew about their true relationship, with Yuika knowing only about their true natures. If she were to see what they were currently doing, she would be both shocked and jealous of the cute masochist. But Keiki had eyes only for his loyal pet, so the only woman he would ravish and treat as a dog was his dear Sayuki that was excited to be fucked by him.

A/N

And chapter 5 is here, everyone! Too bad for Yuika, but her crush has already fallen in love with his dear Sayuki; after all, a sadist like him is very attracted to masochistic girls fufu. Unfortunately for Mizuha, this means that her brother would never reciprocate her feelings for him, but that doesn't mean thag she won't be his family anymore; she can't be his girlfriend, but she will always be his little sister.

Speaking of Sayuki, the girl couldn't be happier; first she got gagged and fucked by her master that shot his load of semen inside her and then he took her out at midnight, with her all naked and dressed like a dog, for a walk. As expected, she got very excited because of that, falling deeper for her beloved Goshujin-sama that will wake up the following morning cuddling with her in her bed haha. But since they planned to go on a date, how will it go? Maybe in a very kinky way? Stay tuned to find out.

See ya!