10. I Learned It from a Book
"It's not that hard, is it?"
With that, Eira lay back on the bed.
She immediately grabbed her own legs and exposed her lower body. At odds with what she was doing, a clean-shaven mound came into view at a glance.

"...Eira, how much experience with men do you actually have?"
"Sexual experience? I don't have any."
At those words, I felt my lower half stiffen.
"......Why haven't you done it until now?"
"Because there was no benefit to doing it."
For such a simple reason?
"Now, hurry up and put it in. I know all about it too—shuk shuk, pshh pshh, and it's over, right?"
As she said that, Eira made a hole with her left hand and mimed sticking the fingers of her right hand into it.
"Where did you learn something like that?"
"From a book."
A virgin elf who learned naughty things from books and spreads her legs wide open? More importantly, what kind of book teaches that sort of thing?
I'd ask about that later. What mattered right now was the pumpkin that had rolled right up to me, vines and all. No, was it a bit small to call a pumpkin?
When I reached for Eira's chest, she looked at me with suspicious eyes.
"What? Weren't we supposed to be having sex?"
"This is part of sex too."
"The book I read said you don't have to do this."
"I don't know what kind of book you read, but Eira, you don't have any experience, right?"
"So since you have experience, I should listen to you? Fine. I'll go along with it for a little while."
With that, Eira offered up her chest completely defenseless. To be able to monopolize this innocent chest—I didn't miss the opportunity and kneaded the soft breasts to my heart's content.
Judging by how she had even more pink spots on her chest than Tia, this woman's breasts were sensitive.
"This is strange. What does this have to do with sex?"
"You'll understand if I keep touching."
Squeeze, squeeze. Tia's breasts reacted well, but they didn't have this kind of grip. I savored Eira's chest like someone tasting breasts for the first time,
"Nn."
and drew a reaction from Eira. She wore a dumbfounded expression, not even understanding what was happening to her own body.
"Do you understand a little now?"
Before hearing her answer, I bit down on her fully erect nipple,
"Nnghah?!"
and Eira answered with a moan. Before she could collect herself, I caressed her breast with my left hand while slowly sending my right hand downward.
I felt her body stiffen along the path of my descending right hand. Past her taut abdomen, grazing her sunken navel, stroking her raised lower belly, I arrived at the smooth mound that had been open from the start.
'Touching here from the beginning wouldn't have been bad either,'
but when there's a closed door, isn't it a man's nature to want to open the closed place first?
"Now, are we starting now?"
Eira asked with a strangely flushed expression.
"No, we're still preparing."
When I lightly grazed her swollen clitoris, Eira's eyes flew open.
"Hnn?!"
After stroking the poor clitoris a few times, I extended my index finger toward the hole between her slick folds.
"Ahht!"
With a moan strangely mixed with pain as background music, I pushed my finger in, and there was the symbol of virginity blocking the intruder.
Squelch, squelch.
I carefully extended my finger so as not to damage it, and while pressing her clitoris with my thumb, I scraped her G-spot with my index finger as much as I could.
"Nnghaht?!"
A louder moan than any before, and half-lidded eyes. Her open mouth, unlike before, couldn't form any words and only let out rough breaths.
Haa... Haa...
When I gave Eira the consideration of waiting until she came back to her senses from the afterglow of climax, she barely managed to ask me.
"Just now, what was that?"
"That's called climax. When you feel it, please tell me you're going."
"Going? Where?"
"To the place Eira just experienced."
"The place that flashes with light and tingles and goes numb?"
"Yes."
After saying that much, I leaned my face in to taste Eira's lips, but unexpectedly, Eira turned her head and dodged.
"Why are you doing that?"
"What do you mean, what are you doing?"
"I was trying to kiss you."
"A kiss is an act of bonding. It has nothing to do with sex."
What did she read to learn that?
"This is included in sex too."
"Nn, no. A kiss should only be given to a lover."
"Then do you have a lover to give it to?"
"Well, no. But still, I should save it for the lover I'll have in the future."
Well, it didn't matter. I could just take something other than a kiss.
"Then please do it for me too."
"Do what?"
"Foreplay. It's the preparation process you have to go through before sex."
"What you've been doing until now? Got it. What do I do?"
At those words, I took off my clothes and exposed my manhood.
"......So this is going to go inside me?"
It had been a solid size to begin with, but after awakening Incubus Body, my member had grown even larger. Looking at it, Eira finally sent a slightly moist reaction my way.
"That's why we do foreplay, so neither of us gets hurt."
"Got it. What do I do?"
"Please take it in your mouth."
At those words, Eira sat on the edge of the bed, slowly brought her lips to my member, and finally, shyly, made contact.

The virgin elf's first kiss. Thank you for the meal.
Soon, Eira began slowly trying to swallow my cock.
"Ah, please be careful not to let your teeth touch."
"Mm,"
"Yes. Like that, roll your lips up over your teeth and sweep softly."
Seeing her slowly follow my instructions, I unconsciously stroked her head.
"Ah, good. I'll go a little deeper."
"Kkhh!"
"Was that too deep? Sorry. It felt so good I couldn't help it."
"Mm,"
"Yes, now please use your tongue to slowly stimulate the glans."
Eira understood my words well, perhaps because her medical knowledge was excellent.
"Good. Now please stimulate the hole in the middle as if sucking on it."
But perhaps because my member was too large for a virgin, the stimulation was a little lacking.
"Eira, could you wrap your hands around the part that doesn't fit in your mouth?"
At those words, Eira politely wrapped both hands around my cock.
"Now please stimulate with your mouth while gently moving both hands."
Eira followed my explanation immediately, perhaps because her learning ability was excellent. As she gently moved my member and stimulated the glans, the urge to ejaculate surged up on its own.
"I'm coming, Eira. Please receive it well."
"Mm?"
Without giving Eira time to resolve the question that had come upon her, I ejaculated into her mouth. A baptism of semen that exceeded the limits of an ordinary man, filling her mouth.
To Eira, who didn't know what to do with it, I taught her how to please a man.
"Now, first open your mouth and show me the semen inside."
Eira opened her mouth with a "bah." Between her once-beautiful lips was a mess of semen.
"Well done. Now swallow slowly. You don't need to swallow it all at once."
Hearing that, Eira gulped down the semen—gulp, gulp. Perhaps because the amount was considerable, after barely swallowing it all over several attempts, I told her the next step.
"Now open your mouth again and show me that you've swallowed it all."
The inside of her lips, opened once more, was clean. At the thought that I had dirtied this beautiful sight, my member stiffened again.
"Then now, please clean up."
"Clean up?"
"Yes, use your mouth to wipe off the residue on my member and swallow it."
Eira diligently followed my words. With those fine lips, she took my member in again and cleaned every corner with her tongue.
Gulp.
After finishing the cleanup like that, I added,
"Well done. This is called cleanup fellatio, and you need to do it after the act is over too."
"Really? You won't need to teach me twice."
Eira returned with a triumphant look. Then, shall I break that momentum again?
I calmed my fully heated member and moved my hands to Eira's chest and groin.
"What? Are we doing what we did earlier again?"
"Eira, it's your first time. The more it's someone's first time, the more important it is to loosen them up well."
If I had warmed her body with Authority of Dream Infiltration, once would have been enough, but I couldn't exactly ask Eira to fall asleep for a while.
Eira seemed half-doubtful, but she entrusted her body to me as it was, and to repay that trust, I played her body with everything I had.
"Nnghaht?!"
"Ah, no!"
"Nnghang!"
Every time I stimulated the erogenous zones concentrated in her chest and nether region, moans burst out. Let's see, if I press this part at this intensity—
"Nngak!"
Failure. Was the stimulation too strong? Then, if I lightly graze the hardened clitoris here—
"Nnghoht?!"
Eira's body convulsed. She could no longer be said to have entrusted her body to me. She had lost her mind and was simply floundering under my touch.
"G-going! Going!"
When I scraped inside her vagina, a second climax followed immediately. I brought my member to the hole of her collapsed, unconscious body.
While slowly inserting it to minimize the pain, Eira came to her senses.
"Nngh, something incomparable to before seems to be entering."
Comparing my fingers to my member was a tremendous insult. Eira looked at her lower body, saw the member entering little by little, and turned slightly pale.
"That... can that really fit?"
"That's why I've been loosening you up until now."
"No, this is strange."
"It's fine. It only hurts the first time."
Of course, if her partner weren't me, it would hurt for quite a while, but since her first partner was me, it was fine to let her walk away with a somewhat mistaken idea of what was normal.
My member slowly widened Eira's vaginal walls as it entered, and finally touched her hymen.
"Nngh. Is it all in?"
"No way. It's only just starting."
To loosen her rigidly tense body, I caressed her chest and blew a puff of air into her ear.
Eira, who had turned her face away thinking I was trying to kiss her, was startled and her body relaxed,
"You, just now that—!"
and taking advantage of the opening when her body relaxed, I shoved it into the hole.
"Nnghaht?!"
A scream escaped her. But it carried pleasure as well as pain.
"You were too tense, so I did it to help you relax."
"Don't ever do that again."
Were elves' ears especially sensitive?
"Now, so if we just do shuk shuk, pshh pshh, it's over, right?"
"I told you, you'll get hurt."
I caressed her entire body until her hole grew accustomed to the member inside. As her body, which had stiffened from the large member entering, gradually relaxed, I began to move slowly.
"Ah, it's moving."
"You feel it, right? Try to focus on it."
The member that had fully occupied her hole slowly pulled out. As it did, the glans scraped her G-spot,
"Ang, ahthang,"
and she naturally let out the moans she had been making all along.
Squelch, squelch, thunk, thunk.
"Nn, ahhang?!"
As I pistoned roughly, her voice rose.
Swoosh, swoosh.
"Nn, nnn,"
When I caressed her clitoris, she let out a frustrated-sounding breath.
Squelch. Squelch.
"Aht, ahht."
When I scraped her wet vaginal walls as much as I could, a pleased hum mixed with her voice.
Squelch, squelch. Swoosh. Swoosh. Thunk.
"Ahhang?! Ahht, nn, nnn, haang!"
As I moved her body, she sang a symphony. As my member sped up, the tempo of the song rose steeply, and just as the melody reached its peak, I bit down on her nipple.
"Going, going, I'm going?!"
Splurt.
As Eira reached climax, her vaginal walls clenched the intruder as hard as they could, and I too sowed thick seed inside her body.
When I pulled my member out of Eira's body, an obscene womanhood revealed itself, mixed with the evidence of virginity and the fluids of man and woman.

With my dirtied manhood still erect, I climbed onto the bed and thrust it toward Eira's face, lost in the afterglow of climax.
When there was no reaction, I brought my member to Eira's lips. Then, as if by reflex, Eira took my member in her mouth and began cleaning it. What on earth was an elf's learning ability?
Slurp, slurp.
While cleaning my member, Eira soon came to her senses. Her eyes widened briefly, as if surprised by the cleaning she had been doing reflexively, but she soon focused on my member and washed away every trace.
Gulp.
After swallowing the mixture of her virgin blood, her fluids, and my semen as it was, Eira proudly opened her lips.
"There, I swallowed it all, right?"
At that lovely sight, I nearly got hard once more, but I reminded myself that what she wanted was only to confirm my Perk, and checked my status.