That day, cla.s.ses finished at noon, and so I returned home to the apartment together with Rein, who had become my slave.
Sunou had not come. Kokoro"s fever had also begun to fall, and it seems that she thought I would come home during the morning.

“……”
“All of them are like this, but even if one thinks that it"s useless at the time, there are times when it does see some use.”
“This has gone past the point of pointless and become boorish.”
“Well, I guess so.”

I sometimes gathered playing equipment in this apartment.
This time it was the type of chain that could be hung from the ceiling. Of course, I can"t drill a hole into the apartment, so it"s something that had become only for show.
Rein was suspended by those chains, restrained in the centre of the room with both arms raised.

“Really, what are you thinking with this?”

While following my orders as a slave and taking up that appearance, she was glaring at me, looking down as though she was utterly dumbfounded.
While thanking Rein who made such an expression, I smiled.

“Well, it"s probably not something very productive.”
“Isn"t that obvious!? Doing this sort of thing……even these clothes don"t just belong to me, you know!”

While fidgeting uncomfortably, Rein surveyed the clothes she was currently wearing.
What Rein was wearing right now was the white military uniform that was drawn on that culture festival poster. I had borrowed it after poking around the executive committee.

“What, I"ve got permission.”
“That"s not what I meant! You, I"ll be using this in the culture festival!”
“Heeh.”

I hummed shamelessly.
It appears that it has been determined that Rein will be wearing this during the culture festival. Well, since they"ve gone to the extent of making posters, there"s nothing strange about it.
The attire for her first a.n.a.l violation shouldering the burden of acting as a poster girl for the culture festival was fascinating.

“Well then, how are you feeling now?”
“You, you"re asking even though you know, aren"t you?”

Although the background was uncertain, the current Rein was wearing a military uniform.
Because she was restrained in it, although I feel bad for her, I thought that the atmosphere was enjoyable.

While tasting what it feels like to be an inquisitor, so to speak, I shrugged my shoulders.

“Is it not better for you to properly respond? You should know your place.”
“What, should I say that I can smell the nice scent of flowers?”
“You"re stubborn, huh? I don"t really care either way, though.”

Even while Rein was a slave, she never submitted to me.
Even though she answers my orders, that is strictly because my position is higher than hers.

I slowly turned around to Rein"s behind.
Rein tried to direct only her neck this way, but when I went around her back, she couldn"t see me anymore.

Perhaps because I was conscious of the fact that the military uniform"s trousers were for women"s use, her waist line had become quite visible. From her white pants, the outlines of her shapely b.u.t.t could be clearly seen.

“Well then, shall we borrow the great slave"s b.u.t.t for a little bit?”
“……don"t keep talking nonsense. Why don"t you just touch it whenever you want?”
“Haha, you really don"t get it, do you……?”

First, I placed my index finger against the back of Rein"s knees, raising it upwards as though I were quickly stroking it.
Surprised, Rein jumped a little in fright as the suggestion of being touched by me took effect.
Dipping my fingers in the sensation of her squishy b.u.t.t, I started tracing it with the tips of my other fingers.
After gently stroking it several times, I hit Rein"s b.u.t.t with great momentum.

“High!?”

Rein raised a slight moan. But of course. The item used for the purposes of expanding the hole was still crammed inside this b.u.t.t.
Even though I was just petting her, I could see that strong reaction. It appears that, in this posture, she was fairly aware of the foreign matter entered inside her.

“You, you really better remember this……”

Rein was probably persuading herself that this couldn"t be helped because she was a slave.
At any rate, even if I released her from being a slave, she wouldn"t be able to attack me.
Removing Rein"s belt, I pulled down her trousers. Without resistance, the trousers fell to Rein"s feet with a *plop*.

“You"re wearing some pretty cute underwear, huh.”
“Shut up! Just hurry up and do it already!”
“It"s not something to be that upset about. I"m complimenting you.”

Rein unhappily grit her teeth.
Even like that, since her a.n.u.s would react with just a press of my finger, it was cute.
Let"s pull down her panties and have her let me see her adorable b.u.t.t and v.a.g.i.n.a.

It appears that the suggestion to go into heat was properly taking effect. Love juice flowed from her v.a.g.i.n.a, to the point where it followed down her thighs.
However, this time won"t be the v.a.g.i.n.a.

“Igh……hh……”

Rein tightly shut her eyes, making an effort to not be conscious of it. Of course, if she did that sort of thing, then she"ll just end up becoming more aware of it.
Using my fingers, I slightly pushed in and pulled out the vibrator that was caught in Rein"s a.n.u.s.

“If you"re gonna do it, then do it……”

Rein was irritated as she received the stimulation to her a.n.u.s. Due to that influence, her pigeon-toed feet trembled.
With a *drag*, I slowly removed the vibrator.

“Uuugh……ngh……hh!!”

Rein"s face flushed, bringing her chin forwards as though straining herself. While her body received a slight feeling of release, she gathered strength into her stomach.
To her, it was humiliating as it was like she had been watched excreting.
To me, it"s precisely because Rein receives this disgrace as humiliation that it"s fun.

“Mm, ngh……haah……”

I took the vibrator from Rein"s b.u.t.t. The still expanded hole of her a.n.u.s twitched without closing.
I inserted my finger into that a.n.u.s, trying to stir it up around and around.

“Hyah!?”
“Hey now, endure it, endure it. Don"t tell me the great and proud Mistress Rein can"t even do that?”
“What……proud……?”

I opened the lotion that I had prepared in advance, and painted my fingers with it.
Next, I inserted both my index and middle fingers, and teased her a.n.u.s as though gouging it out.

“High……igh!!”

To Rein, this was the first stimulation. Strongly closing her lips and eyelids, she tried to endure it.
I purposefully made an obscene *squelching* noise as I painted the lotion, making sounds so that Rein, whose eyes were closed, could hear it.

The b.u.t.tocks are a very sensitive part of the humans. It could be said that the nerves were concentrated there.
If pleasure is linked with her genitals there, then it"s possible to play with it even more than the v.a.g.i.n.a.

“If you"re going to put it in, then……hurry up and do it already……”
“Rein should enjoy yourself too.”
“There"s no way that I"d…..enjoy this!!”

Rein still seemed to have picked up from somewhere the strong impression that s.e.xual intercourse was something vulgar.
Even up until now, even though she received pleasure from being e.j.a.c.u.l.a.t.ed inside of her v.a.g.i.n.a, I knew that the sentiment to disapprove of it surged inside of her.
That"s why, this time, I was thinking that I"d get her to admit it.

“Answer honestly.”
“Yeah, it"s the worst feel……!”

Before Rein could finish speaking, I placed my p.e.n.i.s against her.
Seeing her body twitching just from that was adorable. While stroking her b.u.t.t with the tip of my p.e.n.i.s, I vigorously pushed against it.

“The worst, huh?”
“It"s pointless……really, what"s so fun about this? -ah……kaah……really, it"s stupid.”

The head of the p.e.n.i.s entered inside of Rein"s a.n.u.s. Rein"s b.u.t.t that was just developed today is really tight.
Rein frowned at the sensation of the foreign body entering her. Even so, her a.n.u.s puckered up and stimulated my p.e.n.i.s as though sucking it.

“It"s a natural phenomenon……”
“I didn"t say anything, though.”

I further inserted my p.e.n.i.s even deeper. With a *squeak*, the solid which originally shouldn"t have entered pried open her b.u.t.t.
Perhaps because it was painful, Rein"s mouth was left agap as she repeatedly breathed in and out.

“Now, I"m gonna move.”
“You should, just, do what you want! I"m just letting you do it after……aaahhh!!”

When I pulled out my p.e.n.i.s, a sensation akin to rubbing skin was transmitted through my lower body.
Rein stretched her back straight, as though she had been shocked, and the chains that were attached to her arms rattled loudly.

The figure of her shutting her eyes and clenching her teeth was so terribly s.a.d.i.s.tic and wonderful.

“Does it hurt?”
“Isn"t that obvious……can"t you tell……!!?”
“How are you feeling? Answer honestly.”

Rein did not immediately reply that it was the worst. After breathing several times, her mouth, which was chewing her lips, opened.

“……it tingles.”
“Haha, I see.”

Rein did not admit to the pleasure, but she could not say that it was unpleasant either. That was probably vexing to her.
That"s why, as the only resistance available to her, she was only able to say that.

“Kyah……what!?”
“I thought that I"d give you a bit of variety, see.”

While grabbing Rein"s b.u.t.t, I stirred up her v.a.g.i.n.a with my free fingers. Over the insides of her v.a.g.i.n.a, I was able to touch my p.e.n.i.s that was inside of her intestines.
I tinkered with Rein"s intestines from the inside and out.

“Kyaah! Aagh! Nngh……ahh!”
“Hey now, what"s wrong?”
“Hyah, mgh!!”

I brought my own lips towards Rein"s ear and blew against it.
I was satisfied upon hearing a pitiful voice that was unlike Rein.
In the mean time, I also continued to piston with my p.e.n.i.s. Sometimes I twisted my waist and scooped out her a.n.u.s, satiating myself with Rein"s shrieks. With the shape of my p.e.n.i.s, I did the utmost to gouge out her a.n.u.s, demanding pleasure.
Her a.n.u.s, like a tool being messed around with by an unrestrained child, could only stay pa.s.sive, unable to resist.

Restraining her was the right choice. Because of it, I could feel as though I were rampaging as I pleased.

“Aah……higigh……”

That burden was directed towards Rein"s own body. Desperately suppressing the pain and pleasure, she was weakened like a fish that had been raised out of water.
It should be fine soon.
After this, I"ll end things once I obtain the words of acceptance of the pleasure.

“Hey now, how is it?”
“……ah……gah……”

Rein looked back with unfocused pupils.
While feeling a slight sense of accomplishment from that expression, I prompted her for the finis.h.i.+ng words.
So that I wouldn"t be able to miss it even if she spoke in a small voice, I brought my face towards her mouth.

“Now then, wont you tell me how you feeel right no—–mgh!?”

For just an instant, sharpness returned to Rein"s eyes.
In the next instant, no sooner then when I wondered about what she was doing, she turned to my lips and thrust out her chin, kissing me.

“Mgh!!”
“Nngh!!”

Neither of us could talk to each other.
So that I couldn"t tear myself away from her, Rein strongly sucked my lips and didn"t let me go.
And, as though saying that she was doing her hardest to resist, Rein pulled back her waist and gathered strength into her b.u.t.t.
Towards those chain of actions that seemed as though they were squeezing me out, my p.e.n.i.s, that was on the verge of e.j.a.c.u.l.a.t.i.o.n, accidentally fired off.

“Mmgh, nnnnnnnnnnnnnnnnghh!!”

Rein screamed inside my mouth. At the same time, the insides of her v.a.g.i.n.a squirted and began to convulse.
My heat-filled s.e.m.e.n smashed against the insides of Rein"s intestines.

For a few seconds, the two of us stayed in that position, as though we were immersed in the lingering memory of the act.
The first to move was Rein.

“……puhah……haah, haah……”

After separating from my lips, Rein folded her knees and squatted. Both her arms were connected to the chains, so it almost looked like she was being hung.
While looking down at such a Rein, I touched my lips that still had the sensation of being sucked left on it.

“……there, it"s already……over, right? Hurry……take this off……”

While flas.h.i.+ng a fearless grin, Rein looked up at me triumphantly.
If I were to once again ask here how it it felt, then she would probably reply honestly.

“That"s right, good job.”

However, doing that is just boring, and my pride wouldn"t allow it.
I learned that Rein"s more of a sore loser than expected.
At the last moment, that girl displayed the utmost resistance that was possible for her. I sealed my mouth, as though saying things weren"t going as I intended.

I should express my respects here.

“Just wait a sec.”

While removing the chains that were attached to her, I viewed Rein"s figure who was catching her breath.
If she was brave, then she wouldn"t be ashamed of the proud military uniform, huh.

“There, this should be fine, right?”
“Geez……do you make Kokoro-san do all these sorts of things? How pointless.”

Perhaps because she had been obtained a small victory, Rein"s mood became a little better. Even though she"s a slave, she"s quite the impudent fellow.

“Think a little bit about your partner.”
“I"ll consider it in the future.”

After being released from the chains, Rein placed her fingers against her sweaty forehead and wiped it. And naturally those fingers were placed against her lips.

“……what?”
“Nothing.”

After that, Rein immediately looked at me and glared as though reproaching me.
I simply shrugged my shoulders and laughed.
Let"s have her yield to me at another opportunity.