[Some time later, in one section of the assistant instructors’ room.]
It was nothing new, but the power of magic really was extraordinary.
‘To produce this much hot water in a place without any water.’
Whoosh.
With a light wave of her staff, Natalie, the succubus supply soldier, sent water gushing down from thin air into the deeply dug pit below.
Calling it a pit felt a little strange.
At first, I had envisioned a circular shape, but given the dungeon’s structure, digging it out in a circle could have caused other problems. In the end, it was easier to dig a rectangular pit.
As for how they managed to dig it into such a perfectly shaped rectangle?
They dug out the earth, then shaved the edges smooth with Wind Cutter magic.
After finishing the walls properly, the sides and bottom of the pit were left neat and clean.
Thanks to that—
“Is this amount of hot water sufficient?”
“Yeah. Perfect.”
The water was clean, and I reached my hand into the water filling the pit.
The temperature was perfect.
It had to be around forty-two degrees.
It was about as hot as the hottest bath in a sauna, and I immediately felt like getting in myself.
‘To think magic can really accomplish something like this.’
There was no water here.
Just like the room with the wall toilet, all we had done was dig a hole in one section of the assistant instructors’ room.
There wasn’t even a water pipe, much less an underground water vein.
We had simply filled it with water using magic.
‘It really is amazing.’
Magic was a miracle that science could not explain.
But I had no intention of studying or learning magic right away.
Back when I was still an adventurer, I had once tried to figure out how to learn magic and whether I could walk the path of a mage.
—You have no talent.
After being worked like a slave for a month under some bastard of a mage, the result had been nothing short of disastrous.
Magic was not my path.
‘But I have the brains to make use of it.’
Where this water had come from was irrelevant.
Whether it had drawn moisture from the air or mana was sparkling in the form of water, the important thing was that the pit—about the size of a small drum—had been filled with hot water.
“Safe for contact with the body. Confirmed. Safe to drink. Confirmed. As for the rest... heave-ho.”
I stripped off my clothes in one swift motion and lowered myself into the pit.
Splash.
“My feet reach the bottom, and no residue comes off the walls of the pit. Confirmed as well.”
Because of my height, the water came up to just below my chest.
The pool had originally been designed with the physique of its users in mind, so for someone like me—well over 180 centimeters tall after reincarnation—it was only natural for the water to reach this height.
‘There’s nothing to worry about, so I’ll be able to conduct the training safely and hygienically.’
The inspection was complete.
I climbed out of the pit.
Creak.
Just then, the door opened.
“Instructor. I’ve brought Eris—”
“Oh, good. You came at exactly the right time.”
Lilith entered, clutching the chain and leading Eris behind her.
Eris glanced at me nervously, then quickly turned her gaze away.
“...Natalie. Why are you standing there instead of drying Instructor?”
“I-I’m sorry.”
Lilith prodded Natalie.
I had not particularly ordered her to do anything like that, but Lilith was paying more attention to my condition than I had expected.
Rustle, rustle.
Natalie dried me with a towel.
It felt strange being dried by someone else for the first time, but it was not entirely unpleasant, having a beauty serve me like this.
“Eris.”
“.......”
“You showered in solitary confinement, but you’ve never actually taken a bath, have you?”
“Th-That’s...”
“Get in.”
I pointed toward the pool I had just climbed out of.
“......What are you thinking?”
Eris fidgeted, glancing at the succubi.
“Come on. Could there be anything else I’m thinking of? You two, wait outside for a moment.”
“Understood. If you need anything, call for us immediately.”
At my command, Lilith led Natalie outside.
The only people remaining in the assistant instructors’ room, which was about the size of a university lecture hall, were Eris and me.
“Get in.”
“.......”
Though wary of me, Eris slowly began to move.
‘Good thing I got in beforehand.’
If I had simply left the water there without doing anything, Eris would have asked questions and refused to enter.
But since she had seen me get in and come back out myself, she must have figured it was reasonably safe.
Rustle.
Eris lightly extended her toes into the pit.
The temperature of the hot water seemed to startle her slightly, but she soon cautiously sat on the edge of the pit.
“Th-This isn’t going to sink straight through the bottom, is it?”
“.......”
“H-How deep does it go? I-I can’t swim.”
I had learned something new.
She seemed to like getting into hot water, but she was probably unsure whether there really was a bottom underneath.
“Then hold my hand and get in.”
“.......”
“Don’t want to? Or should I kick you in from behind?”
“N-No. I understand.”
Eris extended her cuffed hands toward me, and I firmly grasped both of them.
Splash.
Holding tightly to my hands, Eris entered the water.
It would not have been an exaggeration to say that every one of her movements was sluggish, but with her eyes squeezed shut, Eris slowly lowered herself into the water—
“.......”
She entered, then immediately lowered her head, her face turning red.
Naturally, there was a bottom where she had placed her feet. In fact, even if she stood flat-footed instead of on tiptoe, the water did not reach her neck.
‘This is it.’
The water came up to just above her chest.
The pit was about five centimeters shallower than planned, but it was not a major problem.
“......M-My hands.”
Eris fidgeted with her fingers.
I released her hands and sat cross-legged in front of her.
“Eris.”
“Y-Yes. What were you going to say—”
“From now on, I’m going to use you to confirm the effects of this ‘aphrodisiac pool.’”
“......What?”
Eris’s expression stiffened as she looked up at me.
“What kind of pool?”
“An aphrodisiac pool. I haven’t decided on an official name yet, but I suppose ‘aphrodisiac hot spring’ will do for now.”
Calling it an aphrodisiac bathtub sounded a little strange, but calling it a hot spring made it seem more impressive, didn’t it?
“From now on, I’m going to turn everything below your neck into an erogenous zone.”
“W-What?!”
Eris tried to scramble out in a panic, but—
“Where do you think you’re going?”
“Ghk?!”
Eris could not resist my touch and was shoved straight beneath the water.
I grasped the crown of her head and lightly pushed it under. The water churned violently below.
Blub, blub.
Bubbles rose up, and after holding my breath for a moment, I released her.
“Pwah!”
Eris coughed.
Her face was filled with bewilderment, and she breathed heavily.
“You, you...!”
“.......”
I said nothing, simply holding her by the crown of her head and looking down at her. Eris soon bit her lower lip and lowered her head.
“Guh...”
Humiliation and shame.
And yet, a faint sense of betrayal also leaked from her eyes.
She had not expected me to treat her like this, but in truth, this was far less severe than the training Eris should originally have undergone.
‘Humans tend to let themselves go without limit when they’re treated too kindly.’
It was not as though I had any particular grudge against Eris.
I had already confirmed the aphrodisiac’s effects, but I still needed to train her to test how far the aphrodisiac could be utilized.
If Eris had any fault, it was that she had not yet fallen deeply enough to become a vampire.
If she were steeped in pleasure a little more, then surely one day, when I told her, “Become a vampire and I’ll let you take my cock,” without actually putting it inside her, she would have to reach the point where she cheerfully cried, “I-I’ll do ittt!”
She was not at that stage yet.
That was why I needed to work on her now and bring her to that point.
So that even the slightest breeze brushing her thighs would make her aroused, with her juices flowing.
So that merely smelling my cum would make her heart race on its own.
‘Still, at least I’m not doing anything below the neck, right?’
Click.
“Ah...?!”
I opened the aphrodisiac I had prepared beforehand.
Eris kept her mouth tightly shut, blinking quietly.
“Eris.”
I tilted the aphrodisiac downward in front of Eris’s eyes so she could see it flowing.
“Consider yourself lucky.”
“Y-You’re planning to put me in water filled with aphrodisiac, and you call that lucky...!”
“Later, I’m going to put slime in instead of water.”
“!!!”
At my words, Eris’s expression instantly went pale.
“S-Slime?!”
“Yeah. Since it’s you, this place is a hot spring. But normally, it’s a slime pit.”
I pointed toward another hole that had not yet been finished.
“It’ll be filled with slime, and the slime clinging tightly to your body will wrap around you from head to toe.”
“N-No...!”
Eris swallowed.
Perhaps merely imagining herself being subjected to that was enough to make her feel as if it were happening. Her body twitched, and she slightly lowered her head.
“Why? Want me to do that to you?”
“N-No!”
Eris vigorously shook her head from side to side.
I had no intention of going that far either, but if Eris wanted it—
‘It should be me doing that to her, not slime.’
Doing it in the water was not exactly a fetish of mine, but I had never tried it either, so I was curious.
Having sex in the sea.
Having sex in a swimming pool.
The very idea of having sex underwater was a little strange, but trying things one had never done before was part of the fun, was it not?
“Good. Eris.”
I stroked Eris’s wet hair, lightly smoothing it into the shape of an apple.
I wondered if it would have been better to tie it up before getting into the water, but Eris looked quite beautiful even with her hair wet.
And then—
“......!!”
Eris suddenly lowered her head.
At the same time, she fidgeted with the only part of her hands that remained above the water—resting in front of my legs—and began breathing excitedly.
“Eris.”
I slightly raised myself, then knelt in front of Eris and adjusted my posture.
“What are you doing?”
“W-Wait. Why is that...?”
“It’s in exactly the right position.”
It would have been more appropriate if I had sat down fully, but I had no intention of turning my own lower body into an erogenous zone with the effects of the aphrodisiac hot spring.
Instead—
“Stand on your tiptoes.”
All Eris had to do was raise herself slightly.
“Suck.”
I lowered my stiff, erect cock with one hand and aimed it precisely at Eris’s face.
“With your mouth. Suck it.”
It was not a creampie.
‘It’s about time I received some blowjob service.’
After spending the past few weeks fucking Eris over and over again—
“Ghk...”
Eris bit her lower lip as though humiliated, but she did not try to bite my cock.
Instead, she caressed it with both hands and merely brought her face closer to the tip.
“That’s right. If you make me come right now...”
I grinned.
“I’ll let you soak and rest in a bathtub without aphrodisiac instead of this aphrodisiac hot spring.”