The next morning. Chihiro woke up to the sound of someone coughing.

He opened his eyelids and looked up to see Aika half-asleep on the bed, breathing with tears in her eyes.

Near her face, exposed through his pajamas, is his magnificent erect penis.

「Aika, did you wake me up?」

「Y-Yeah. Riko-chan asked me to」

Riko-chan told her to wake up Chihiro since she was taking care of breakfast.

It was probably because Maria wasn't around to help, but Riko might have used the opportunity to show Aika a good eye.

「...I couldn't do it properly like Riko-chan and the others, though」

Well, her response was less sensitive than it had been when she was awake, and she seemed to lose her breath as the stimulation continued for longer.

「Thank you. I'm still happy」

「...Mmm. I'm glad」

Chihiro smiled as he raised himself up and pulled Aika into a hug.

He then kissed Aika's lips, savoring her tongue and saliva.

A few minutes later, they parted their lips and Aika whispered softly to Chihiro.

「Chihiro-kun, I bet it would be weird if you didn't let it out」

「Eh. Well... yeah, sort of」

It's been a habit of his lately to ejaculate during Maria's or Riko's blowjobs, so it's certainly uncomfortable for him to just stop. Of course, it's not a necessity, but...

His devoted and hard-working girlfriend made an unusual offer out of consideration.

「So, um... Would you like to do it here?」

Aika gently traced her finger under her skirt, to her private parts, which were covered by her pure white panties.

「Is that okay?」

「Yes. I can't do it with my ass yet, so I want you to put those on」

Chihiro was a little lost when he heard that.

He felt bad asking Aika, who wasn't a slave, to do that much, but last night had been a bit light, so it was nice to be able to do it here.

As long as it doesn't take too long, there should be no problem with the time.

「Well, I guess I'll ask you」

「...okay」

Aika nodded, her eyes switching to a lecherous, in-action look.

Aika took out a stock of condoms from the bedside cabinet, grabbed one of the wrapped condoms, and pulled out the content.

「Uh, it's still wet, so this should be okay... right?」

Flipping the condom over so as not to confuse the reverse side, she carefully wrapped it around Chihiro's penis. Apparently, she was right, and breathed a sigh of relief.

...Though, to tell the truth, Chihiro still sometimes mistook the back and front of the rubber.

After carefully covering his erect penis with the rubber, Aika said, "Well, let's go, shall we?" and she pulled her panties off her legs.

Then she reached down through her skirt to her hairless crotch.

Squelch… Squelch…

「Mm, mmm...」

She readied herself until she heard the lustful sound of water, then opened her legs and positioned herself over the penis.

「Are you okay, Aika?」

「I'm fine. I'll try, no, let me do it」

In a position she'd never been in before, Aika swallowed the rod slowly.

「This is more than usual...」

When her private part was fully penetrated to the root, she let out a lusty gasp.

Well, Aika is already used to penetration, so once she overcomes her psychological resistance, the cowgirl position should make it easier for her to feel the shape and size of the penis.

Although she may not be so good at female-dominated activities.

Aika moves her hips gently.

At first, she moves awkwardly, as if getting used to it, and then she gradually learns to move more smoothly.

「Aika, don't worry, you can put your hands and feet wherever you want」

「Yes, but...」

「It's okay. It's best if you do it in a way that's comfortable for you」

Chihiro smiles to reassure her.

And nodding her head, Aika put her hand lightly on Chihiro's stomach and started to move her hips up and down again.

Squelch… Squelch…

Aika's movements became somewhat more steady than before.

The position of her hands and the direction of her body may differ from other individuals, but Aika seems to be the type of person who is more comfortable when her body is supported.

「How is it?」

「Mmm... it feels good. How about Chihiro-kun?」

「Me? the feeling of wanting to cum is getting stronger and stronger」

In the cowgirl position, Chihiro's movements are less involved, making the stimulation less predictable and more likely to lead to sexual sensations. In addition, he can feel Aika's body heat across his thin skin, which definitely heightens his mood.

On the other hand, Aika has to control her pleasure, which is rather hard work, but she smiles and continues her vaginal services.

「I'm glad. Now let's move some more」

Squelch… Squelch… Squeeze… Squeeze...

「Ugh, kuh...」

「Mmm!」

Chihiro's hips jumped in response to the thrill.

And with that, he thrusts up against Aika, and a gasp escapes from the girl's mouth.

「Aika, can I let out?」

「Yes. Chihiro-kun, give me as much as you want...」

As she said that, Chihiro thrust into Aika's vagina several more times, and his hips quivering as he climaxed.

Spurt! Spurttt!

「Ah, ahh...」

Perhaps feeling the pulsation of ejaculation inside her vagina, Aika let out a gasp of air and weakens.

...Ah.

Chihiro also relaxed, feeling the semen shoot into the condom. He felt his consciousness switch to the active mode. It's a scary habit, he thought.

「Thank you, Aika」

「No, if it made Chihiro-kun feel better... Kya!」

He called softly to Aika, then sat up, supporting her body with his arms.

Kiss...

「Mmm...」

He kissed her lips, which had opened lightly in surprise, and hugged her in a face-to-face position. This time, unlike the cowgirl position, he holds Aika with his arms and thrusts aggressively.

「Chihiro, kun... I'm coming...」

「Yes, Aika, come」

The morning's activities finally came to an end as Aika climaxed quickly and sweetly.

Aika lay on the bed with the penis withdrawn, muttering in some frustration.

「Chihiro-kun, isn't that going to make it harder for you?」

「No... it's okay. Maria will take care of it」

Aika nodded her head in agreement.

「I guess so. That might be a good idea」

After they cleaned up the mess, they got dressed and left the bedroom.

In the kitchen, a meal was being prepared, with Riko as the main cook and Hana supporting her.

「Oh, good morning, Chihiro」

「Good morning. Riko, Hana」

Riko raised her voice to greet him.

Hana looked at Chihiro sideways and said.

「I've bought what you asked for. It's in the fridge」

「Thank you」

He'd asked her to do the shopping in advance.

The stuff he asked her to buy was some nutritional food in jelly form and some mineral water in plastic bottles. And one by one, he took them out of the fridge.

Then Hana stopped what she was doing to get ready and said.

「I'll go with you」

It seems she wants to take care of Maria as much as possible. Since there was no particular reason to refuse, Chihiro nodded lightly and agreed to Hana's request.

And so, they put some water and jelly on a tray with a towel and entered Maria's room through the open door.

Immediately, a faint scent of sweat could be smelled.

「Maria, are you awake?」

「Mm...」

Chihiro called out from the bedside, and her eyes are vacant. The girl's eyes are slightly darkened, as if she hadn't slept much.

And her eyes conveyed a feeling of loneliness.

Even with Chihiro and Hana by her side, this feeling remained a relief and continued to sway in Maria's mind.

「Hana?」

「Yes」

Hana squatted down and removed Maria's ball gag.

The spherical part of the girl's mouth is soaked, and a trail of drool runs from her mouth to her neck and down her chest.

Hana tosses the gag onto the bed and kisses her lightly on the cheek. She then licked Maria's drool off with her tongue.

「...Hana-san, it's filthy」

Finally, Maria spoke up.

Her voice was dry from being silenced for so long. It seems that she needs to be fed and hydrated.

「Maria-chan's spit can't be dirty, can it?」

Hana replied, taking the lid off the plastic bottle and gently placing it near Maria's mouth.

In this kind of training, Hana's steady attitude is good or bad, but in a way, she is easy to handle.

「Please drink slowly」

The bottle is tilted and a small amount of water flows into her mouth. Maria almost choked at first, but she drank the water without any problem. Eventually, the 350mm plastic bottle was almost empty.

After the water, she was given jelly.

This is also a liquid food, so it is easy to eat, and Maria was able to keep the whole package in her stomach.

After the meal, it was time to get cleaned up.

「Izu... Master, I'm going to take this off」

「Yes, please」

The bondage is carefully removed so as not to damage the skin. Because of the design of the belt, it is possible to take off the bondage even while her arms and legs are restrained.

However, gloves and socks are left on.

The panties were cut off with scissors, and the vibrator and dildo inside were carefully removed so as not to damage the inner mucous membrane.

「It's so slippery」

Maria, who had been unresponsive during the operation, twitched.

Hana glared at Chihiro as if to say something, but started the rest of the work.

She wiped her unrestrained body with a wet towel and sucked up the remaining water with a larger towel.

...Looking at her again, Maria's skin was very beautiful.

Rough skin caused by external factors is considered as damage and is repaired by [Self-healing], and she is said to have better hormone secretion than other people.

However, in such a case, her appearance and physical condition do not match each other.

「...Well, I'll take care of this. Have a good time」

「Thank you」

Hana collected her ball gag, bondage and vibrator and left the room.

The door is still open, but subjectively it's just the two of them. However, there is no way Maria can afford to be concerned about Riko and the others who are not here.

After more than ten seconds of silence, she opened her mouth.

「...Master, does this mean that I should behave myself? Master says Takatsuki-san is right」

Her voice was weak. It seems that even she is enduring the blame this time.

Well, Aika's accusation was followed by the sudden hard training. And without even knowing what Chihiro's intentions were, she was being put under so much pressure.

And if she can't even be confident in her own feelings, she can't help but waver.

「No, it's not」

Chihiro answered Maria's question with a shake of his head.

He crouched at the bedside and spoke from her side.

...It's natural to think of this training as "punishment" for a "sin".

「I don't know how to say it, and I'm not going to say it right now. ...this isn't just training for that. Perhaps it would be more accurate to say that the purpose is not yet determined」

「...what does that mean?」

「I don't know」

Too much talk might interfere with the training.

Chihiro patted Maria's head lightly and stood up.

「Master」

「I'll be back in a bit. Until then, will you be a good girl?」

「...Yes」

The answer came back a little later.

After leaving Maria's room, it was business as usual.

He took a shower, changed his clothes and had breakfast. The only difference was that Maria was not at the table and Chihiro changed into casual clothes.

Hana hadn't prepared to stay overnight, so she ate breakfast first and hurried back to her house.

「Chihiro-kun, I made your lunch as usual, is that okay?」

「Yes. If anyone in the class asks, just tell them I overslept」

「Okay. I'll be waiting」

After dinner, Aika and Riko finished the rest of their chores and went to school.

After seeing them off, Chihiro went back to Maria's room.

He thought she might be asleep, but the dark-haired girl was still awake.

「Master, are you going to school?」

「I'll be going later. Maria will probably stay here for a while」

「...」

The restraint training isn't over yet.

For a while. Although the time frame was vague, Maria must have thought the training was hopelessly long.

And with a swift glance, she asked...

「So, the committee for the school festival...」

Perhaps out of a sense of responsibility, or perhaps for some other reason.

Chihiro lightly dismissed the first reason mentioned, which was not housework, service, or attendance.

「It's not a problem. I will ask Riko to do it for you, and at worst you'll be out of 1-C」

...Nothing will change without Maria.

Did it sound like that?

「Well, I see. ...Yes, of course like that」

Maria felt her body suddenly relax.

And knowing that this was not a good thing, she doesn't talk about it again.

And "I'm sorry", she muttered in her mind.

Chihiro picked up Maria's smartphone and ordered.

「Well, Maria, shall I call the school and tell them you'll be out for a while?」

「...Yes」

The call to the school was completed clerically.

Maria told them that she had to go to her parents' house and it was accepted without any problem. Since it was a staff member, not the homeroom teacher, who took the call, and since many of the students at Shibahou Academy lived far away from their parents, there was almost no problem.

Now, no one would be suspicious if Maria was absent for a few days.

「...Well then」

Chihiro exhale and remove Maria's shackles. The rope connecting the shackle to the bed is also untied.

But the shackles remain in place.

Then, he quietly tells Maria, who tenses, unsure of his intentions.

「I will do it」

「...In this state, huh?」

It's a harsh thing to say to Maria, who is mentally exhausted from the night's restraints and vibrations.

And to top it off, she couldn't even use her arms.

There's no way she can perform a proper service like this.

――Still Chihiro is saying that he, as a master, will fuck his slave.

「Are you having a problem?」

Maria could only remain silent.

And accepted the silent reply, Chihiro rolled Maria onto the bed and carelessly inserted his penis into her well-wetted clit, thanks to the vibrator.

Then, while making gurgling noises, he moved his hips to make himself feel better, not her.

「...Mmm...」

Maria was trying hard to keep her voice down.

Even rough sex could make her feel. Chihiro wondered how Maria felt about her own body at that moment.

As he thought about it, he poured her cum into Maria's vagina over and over again.

「Mmm――!」

During the act, Maria climaxed several times.

Afterwards, Maria lay there with her eyes cloudy and vacant. Chihiro wiped her body with a wet tissue and lifted her into the bedroom in a princess hug.

At the same time, he undid the restraints on her arms and fastened them back in front of her body.

Leaving the leg restraints undone, he rolled her carelessly onto the bed.

「If you try hard enough, you can get out of the bedroom, you know?」

She could at least go to the bathroom if she wanted to.

In addition, she could fill a jug with mineral water and place it on the cabinet.

Combined with the food she had just eaten, she should be able to last about half a day, no problem.

「...May I?」

「I will not allow it. Of course, you understand the risks」

Maria confirmed and Chihiro replied that of course it was not about the bathroom.

Being able to move means that there is a chance of escape - but he trust Maria on that.

There is no way this girl doesn't understand what it means for a slave to run away from a master who has made up his mind.

"If you understand and then run away, there's nothing to be done".

The only thing to do is to accept that the chain of trust has been broken.

She must have understood the implied intention. While Chihiro finished the rest of the work, Maria stared blankly at the ceiling, as if she were confronting her own mind.

Chihiro took another shower and made Maria eat an early lunch of energy jelly before going to school.

And in the class, there was no one who could relate Chihiro's tardiness to Maria's absence.

「Hey Izumi, did you hear about Fukami-san's absence yet?」

...At least as far as those around him could tell, but...

This was what Chihiro thought when he saw Maisaka talking to him during the break after school.