Before the real punishment began.

Chihiro pulled Maria and hugged her tightly.

He tasted Maria's body for a few tens of seconds and then kissed her roughly. Like Chihiro, Maria couldn't wait to share her lips with him.

When they parted their lips, he squeezed her breasts. He squeezed her breasts hard, so hard that his fingers left marks.

「Are you so anxious?」

Letting go of Maria.

「Yeah... I'm anxious」

Chihiro nod and kiss her chest.

He sucks hard, and when he lets go of her lips, he leaves a mark. This marks the first time he has intentionally placed a hickey on Maria's body.

Maria looks slightly troubled when she sees it.

But that's all. She doesn't try to blame Chihiro, and her self-healing doesn't activate.

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「If I could, I want to keep you in a collar forever」

「...Fufu. I don't mind, though」

Maria whispers with a seductive smile on her face.

「And what Master wants is not a physical connection, but a sign of dominance, right?」

Yes, Chihiro doesn't want to show it off to the people around him.

It's fine if only Maria sees it. But he wanted a strong sign that Maria would never leave his side.

Though there is no such thing as a convenient thing.

「Well, there is something like that」

「Like what?」

「Piercings, tattoos... things like that」

He caressed Maria's private parts, making them even wetter than they already were.

「The shave Master gave Riko, and this hickey, are soft, but they have that aspect to them. ...I'd like you to do it next time, too」

「Then I'll do it for you next time」

Chihiro's penis was ready to explode at any moment.

But Maria didn't ask for penetration, she wanted to serve. It was obvious from the heat of her body and her breath that she was also aroused.

「Please, let me do it」

Her mouth, filled with saliva, takes the rod into her mouth.

*slurp...* *squelch...*

Her tongue moves frequently to lap up the fluid on his penis. And with so much liquid in her mouth, which is hot and sticky, giving Chihiro a different kind of satisfaction than her vagina.

It makes him want to ejaculate immediately, but Maria seems to know the limit from Chihiro's reaction. She skillfully adjusts her movements and keeps him on the verge of cumming. After all, the longer he holds on to the pleasure, the stronger the ecstasy will be when it's released.

Puha.

After a few minutes of tasting Chihiro, Maria pulled her mouth away and begged.

「Come, Master...」

She lays down on the bed and offers her bare breasts to him.

She lifts them with both hands and presses them together from the outer side. Then the cleavage fills with flesh, leaving only a small gap.

Chihiro knew that he was being told to put it his penis.

If it's sex, he would have expected it to be in the vagina, but now, this is not that, it's a part of service. It's a variation called breastjob, an obscene service using her two breasts like vaginal meat. And then――

He rides Maria's belly and slowly inserts his penis.

The resistance is less than that of the vagina. There's less lubrication, of course, but instead Maria's breasts are soft and can be shaped in any way to envelop Chihiro's penis.

No large movements are required too.

And as he moved his hips slowly, intoxicated by the gentle stimulation of being stroked by flesh, which is different from pistoning or being handled, his white slime poured out ceaselessly with a feeling of immense happiness.

*spurt* *spurt* *spurt*

The gentle pressure prevented a violent ejaculation, and instead a white, slippery liquid flowed between her breasts. Maria scooped it up with her fingers several times, bringing it into her mouth each time.

「Maria」

「Yes, Master, hold me as long as you like」

After that, they embraced roughly.

Missionary, reverse back, cowgirl. Each time Chihiro ejaculate, he changes his position and fucks Maria again and again. Maria accepts Chihiro's cock with wild excitement.

And the feeling of her vagina tightening painfully made him realize that he was being desired.

Eventually, they stopped what they were doing and lay down on the bed, still connected.

「...but piercings and tattoos...」

Those are all things that leave marks on the other person's body.

Tattoos can't be easily removed, and piercings leave holes. They are invisible to others unless the person is naked, but the person who has them will see them with their own eyes every day.

Shaving and hickeys will return to normal in a short time, but a proof of master-servant relationship need to be engraved much longer and deeper.

The only problem is the cost and means.

But thanks to Hana, there are some tools available, but not even she brought piercings. In other words, it's such a high hurdle to overcome.

「Sure, it's hard to do right away. But Master, someday, would you like to engrave a mark on me?」

「Yes. I promise. One day, I will」

And Maria's face broke into a smile. Like a little girl.

「I'm glad. Of course, I'm still Master's slave without it」

At that moment.

For a moment, Chihiro felt his own body heat up. It wasn't an emotional feeling, but an actual heat that spread through his arms and legs to Maria.

「Mmm」

Maria moaned softly and writhed.

Then she gave a curious look.

「What was that...?」

Chihiro couldn't answer the question.

So, the two of them separated and checked to see if there is anything wrong with their body. And there is nothing wrong with their physical condition, and their appearance is generally unchanged, but there is one small change.

Maria's lower abdomen.

Just at the navel, there is something that looked like a mark. It has a complex design of several overlapping lines, about a few centimeters in diameter.

It appears to be made up of a number of letters, not pictures.

It doesn't seem to be a natural phenomenon.

So, it could be caused by...

「A new ability?」

「...I suppose it's natural to assume so」

Maria replied, her brow furrowed.

It seemed that even she hadn't caught up with the inexplicable phenomenon.

「Anyway, let's test it tomorrow, shall we?」

「Sure」

The day after tomorrow is the sports festival.

Chihiro and the jet-black girl nodded at each other, wondering if it might be useful.

Then he slowly raised himself up and told Maria, who was lying down happily.

「Well, Maria, let's start the punishment」

「...Eh? Now?」

「Of course. I haven't done anything yet」

Normally, it would have been sex, or the promise of a piercing, but this time, Chihiro wasn't going to let that be her punishment.

Leaving Maria pouting and waking up, he went to the bedside cabinet and took out something he had prepared in advance.

It was a plain, thin, oil-based pen.

Immediately, Maria's face changed.

「Master, no way」

Chihiro already noticed. Naturally, Maria couldn't help thinking of a use for the pen for that.

Her surprise turned to excitement, and her eyes grew moist with excitement.

She could feel her already satisfied body heating up again.

「Yes. I'll use this to scribble on Maria's body. Of course, not just any scribbles, but obscene words」

「...That」

「I think I'll start with your breasts. It's oil-based so it won't come off easily, and it'll probably stay at school tomorrow. ...You don't like it? I'll stop if you don't」

Originally this is a punishment.

Maria should have known what it meant to refuse, even if she hadn't said so.

So.

After shaking her body, the girl answered Chihiro.

「Please. Scribble Maria's body with obscene word」

「Okay」

Chihiro first ordered Maria to lie down on her back on the bed. And he ordered her to spread her legs lightly and he get into a standing knee position while his hands lightly grasped her sides.

*take a deep breath*

As Riko had said, this play was a bit beyond Chihiro's experience. He tries to calm himself down as much as he can before tell her.

「So, Maria, tell me what you want me to write」

「...I'm the one who's going to say it?」

「Yes, you will. I'm not forcing it. But I'll keep scribbling until I'm satisfied. You can muddle through with mild language if you want, but then the space for writing will get smaller and smaller」

If Chihiro is not satisfied even after using up her body, he will use the arms, legs, or face as a canvas.

And of course, if the scribbles extend beyond the summer clothes or gym clothes, they will be exposed to the public eye.

As a slave who is being punished, it is impossible for her to wear a jersey, and if the amount of scribbles increases, it may not be possible to erase them in a day.

If that happened, she would have to participate in the sports festival with the scribbles still on her body.

「――Hmmmnng!?」

*twitch* *twitch*

Without warning, Maria let out a cry of delight and hugged her body. Just like the first time she wore a collar, she came lightly just from her imagination.

Chihiro said coldly as he felt his own penis rising to the top.

「Maria, what's the first thing you want? If you don't hurry, it won't be over in the morning」

「Yeah...」

Tears well up in the girl's eyes.

Her lips quivered, and in a few seconds, a word was spun out.

「Fukami Maria, Class 1C, Shibahou Academy」

「Yes」

Her affiliation and full name.

Although Chihiro had tried to scare her, she was so bold that he was taken aback. But he cleared his throat and took off the cap of the oil-based pen.

It leaves a black ink mark on Maria's smooth skin.

It should be as neat as possible, visible from a distance, but not too large, just below her breast.

「...Ahh」

「Maria, if you move, I'll mess it up」

「Oh, I'm sorry」

Chihiro snapped at Maria, who shuddered, and she clenched her fists and began to try to suppress her reaction.

Soon the first word is written, and he prompted her to write the next.

「Slave」

A sweet voice whispered the dreaded phrase.

Maria seemed to experience a tremendous amount of pleasure as she said each word and as the grease pen slid across her skin.

And the second word is written below the first.

「Lewd」

「Pervert」

「Masochist」

「Bitch」

They both began to pace themselves more and more.

Chihiro is just getting used to it, but Maria is rushing Chihiro for more pleasure. It seemed a shameful thing for a slave to do, but Chihiro didn't blame her.

「Human, disqualified」

*squeeze*

The words are written around her collarbone, and the moment the tip of the pen left her body. Maria's body shuddered and she climaxed.

「Ah... this is not good」

She couldn't have been happier.

She looked like a different person from when she lay in bed with Chihiro earlier. She looked like a masochist, immersed in pleasure, colored by despair and shame.

...absolutely, truly despicable.

「Maria, if you do that now, it will be hard later」

「Yes. That's right, but... Hmmmngh」

Training.

I can feel it when Master look at me.

Please abuse me.

I've devoted my life to Master's penis.

...et cetera.

Those words are the words that Maria uses to humiliate herself, and they are so varied that it makes Chihiro wonder how she can come up with so many phrases.

And despite her many climaxes, Maria never stopped opening her mouth, and just when she seemed running out of words, there was no more room left to write on her torso.

「*pant* *pant...* Now, is that OK?」

Maria said, peeking at Chihiro. Chihiro looked at her face, as if she was on the verge of going crazy from overexcitement, and suddenly thought.

（Was she adjusting the phrases so that her own body would fill up just right?）

He didn't want this training to end too easily. So――

Hmm...

A smile naturally escaped his mouth.

「Yes, that's enough. On "the front"」

「...Eh?」

Finally, Maria's expression turned blue.

With a single word, she must have understood Chihiro's intentions, and at the same time understood the mistake she had made.

She put her hands on the bed and begged Chihiro, moving her weak arms desperately.

「P-Please. Master, please forgive me. If you do anything more, I'll...」

「Maria, turn your back on me」

「...Ah, haha」

Her tear-stained face stiffens.

Maria said nothing more and turned over on the bed.

Her unprotected white back is exposed.

Chihiro felt his chest throbbing with guilt and his heart burning with even more excitement, and asked in a calm voice.

「I'll allow you to use the same words as on the front. Now, what would you like?」

「...Fuh, haha」

Suddenly.

「Hahahaha!」

The loud laughter echoed through the soundproof bedroom.

Chihiro wondered if Riko in the next room could hear it through the soundproofing. Maria's voice sounded as if it might be heard by Riko who was standing next to her, and then she started to speak lewdly like a machine gun.

Her eyes completely debauched, reflecting nothing.

From normal sex to thorough shame torture.

The sudden ups and downs burned Maria's heart, which had been protected by her strong reason.

「Master, Masterr. This is the best. It feels so good I'm going crazy. Please fuck me, break me, make me more fucked up! Make me cum and kill me! I don't care if you kill me now!」

It really was an extreme madness, colored only by lust.

『It's too strong, even I can't control her』

Chihiro felt that he had witnessed for the first time the true meaning of what Maria had once said.

There's no way anyone can control something like this on their own.

It's the same even with the help of others. So she is like――

Still, Chihiro tried to move his pen, but after writing just a few words, he gave up.

He doesn't have to write.

He no longer cared about these training rules.

The punishment is now more than enough. It worked so well it broke Maria.

「...Maria」

Chihiro hugged Maria tightly, restraining her with his arms and legs as she laughed and shuddered and continued to climax.

When Maria tried to wriggle away, Chihiro hugged her tighter.

For minutes and minutes, until she calmed down.

Eventually, Maria stopped moving, as if she was tired of crying.

When Chihiro saw that she had fallen asleep and was beginning to breathe softly, he felt his own physical limitations and lost consciousness.