I Met Her First — Intermediate Spirit Undine
I felt my erect shaft slowly shrink in my hand. It felt as if time itself had ground to a halt. But as I watched the semen resting on the tip of Undine's nose drip down and pool on her lips, I finally gave up on trying to salvage the situation.
This wasn't supposed to happen. Thinking about the women from my past must have made me lose control without realizing it. Normally, I would have easily sensed Undine's presence, but I had been so focused on my own pleasure that I hadn't even noticed her approach.
What should I say? As I hesitantly watched her, something incredible happened. Undine, staring at the dripping semen, suddenly darted her tongue out and licked up the fluid pooling on her lips. The thick glob of semen was swept up by her blue tongue and swallowed down her throat with a soft gulp.
Because her body was semi-translucent, I could see the whitish, slightly yellowish fluid travel down her throat and into her body with my bare eyes. The sheer, X-ray-like transparency of the sight made my softening shaft surge back to life. Watching my own seed flow through Undine's body in real-time was incredibly erotic.
*Gulp.*
With a distinct swallowing sound, the semen that had lingered in her throat flowed down into her abdomen. It continued its descent until it suddenly stopped around her stomach, as if caught on something. Then, it seeped into a faint, white sphere-like object and vanished completely.
The faint white sphere also grew hazy and disappeared after a moment. It had all happened in the blink of an eye, but once it was over, a heavy, suffocating silence filled the passage.
Undine, who had been staring at me blankly, shifted her gaze to my fully erect, throbbing shaft, which was already oozing pre-cum. She spoke hesitantly.
"[...What did you just do?]"
What? Before I could even process her question, a rapid-fire barrage of inquiries poured from her lips.
"[What were you doing?]"
"[Why did you take off your clothes and shake that thing?]"
"[Something came out of it, and it was sweet! And I think my mana increased for a moment, too.]"
"[Is that your mana? You can release mana like that?!]"
I was utterly overwhelmed by the deluge of questions, but as they settled in my mind, I began to piece things together. I had always known Undine was quite childlike, but I never expected her to ask such things with the pure, unblemished curiosity of an innocent child.
As I debated how to answer without tanking her affection for me, Undine, still floating in the air, tilted her head down and stared intently at my rock-hard erection.
Sensing her gaze, my shaft twitched. She watched it with a slightly surprised expression before finally reaching out a finger to poke the very tip of the glans. Watching the pre-cum stretch like a transparent thread along her finger, she looked up at me with eyes full of wonder.
"[Sniff, sniff... Mmm, it smells sweet...]"
"U-Undine, let's... let's get ready to move."
"[Oh, right! There was nothing up ahead! We can go down now!]"
As soon as I diverted the topic, she remembered her scouting mission and reported her findings. Fearing she might ask more, I quickly wiped my hand, pulled up my trousers, and adjusted my clothes.
But my hopes were quickly dashed. Watching me finish doing up my pants, Undine immediately resumed her rapid-fire questioning.
"[So what were you doing? Sein has one of those dangling down there too.]"
"[Why do you shake it with your hand? Are you squeezing out something bad?]"
"[But it tasted so sweet for something bad~ I was really surprised.]"
"It's not like that... It's a bit hard to explain..."
"[Whyyy~ I'm curious! Tell me!]"
She whined and pouted. If I left it at this, she would undoubtedly go back and grill Sein with the exact same questions. I had no choice but to tell her.
"Sometimes, men have urges they just can't hold back, so they have to release them periodically."
"[What can't they hold back?]"
"...Sexual desire."
"[Ah~ Like wanting to mate with human women, or wanting to fuck elves and beastkin? Things like that?]"
"Cough! *Hack!*"
I choked on my own spit as those completely unexpected words came flying out of her mouth. Hearing her say things like 'mate' and 'fuck' with such an innocent, pure face caught me completely off guard.
"Where on earth did you hear words like that?"
At my question, Undine puffed out her chest proudly.
"[I followed Sein around and heard the mercenaries talking all the time~ Oh, so that's what it was?]"
"Has Sein never done that?"
"[Sein has never done that when he's with me! That's why I find it so strange~]"
Since Undine was always clinging to his side, he probably couldn't visit brothels or hookers... and he couldn't exactly masturbate right in front of her either. In more ways than one, he was a pitiful bastard.
"That's probably because Sein treasures you too much."
"[What does treasuring me have to do with it?]"
Undine tilted her head in confusion. I explained it to her.
"Normally, this is something embarrassing to show others. Sein definitely wanted to do what I just did when he was with you, but he must have held it back."
When I spoke with absolute certainty, Undine's eyes widened in surprise.
"[Really?]"
"Of course. It must have been incredibly hard on him. I couldn't hold it in either, which is why I masturbated."
"[So that's called masturbation...]"
Undine unconsciously swallowed hard, her eyes briefly scanning my crotch. Seeing her reaction, a thought struck me. Perhaps I could use this to my advantage. I decided to test the waters.
"Who knows, maybe Sein is masturbating right now while he waits for us."
"[Masturbating even when he's hurt! Is it really that hard to hold back? Hmph...]"
Realizing that Sein had been forced to endure such agonizing frustration all this time just because she was always by his side, Undine's face fell, and her head drooped. It seemed she was deeply saddened by the thought of having caused suffering to the Sein she loved so much.
"Well, there is a way you could help him."
"[Me? Help with that?]"
Undine swallowed again. Perhaps remembering the taste of the semen she had just gulped down, her gaze remained fixed intensely on my crotch.
"Humans have ways of helping each other release it. Since you have the form of a human girl, you can do it too."
"[Then teach me! I want to go back and help Sein!]"
"If you do a half-assed job, it'll only make it harder on him. If you want to help, you need to learn how to do it properly."
Undine scowled, her face scrunching up at my reply.
"[What! Then what am I supposed to do?!]"
"You can just learn from me."
"[From you...?]"
*Gulp.*
"[I-Is that so? If I learn from you and show Sein, he'll be happy, right?]"
I nodded in agreement.
"Of course. He'll be absolutely thrilled that you practiced just for him."
"[Really?!]"
"If someone did that for me, I'd be incredibly happy too."
"[Wow! I want to learn, I want to learn! You might be annoying, but you really are useful!]"
It was slightly irritating how she kept calling me an annoying human, but for now, I just needed to teach her fellatio and gradually tame her. Hearing her say my semen tasted sweet, it seemed even the tiny speck of mana in my body had its uses in this department.
"The first thing I'm going to teach you is called fellatio."
"[Aha! But why is it called fellatio?]"
I didn't know either. I hadn't even known the etymology of the word back on Earth, and after hearing oral sex referred to as fellatio in this fantasy world too, I had given up trying to understand it. Besides, I barely had any proper knowledge of this world anyway, so what did the etymology of fellatio matter to me?
"Who knows? Maybe the first person to do it was named Fellatio. There are lots of things named like that."
"[Aha! You're pretty smart!]"
It was quite amusing to watch Undine earnestly absorb every single piece of nonsense I spouted.
"First, you have to start by kneeling."
"[Like this?]"
Undine drifted down from the air, landing softly on the ground, and slowly knelt. Her fluid, elastic legs deformed slightly against the rough gravel, but she seemed to feel no pain as she settled onto her knees with ease.
I took a closer look at Undine's features as she looked up at me from her knees.
Her messy, unkempt blue hair gave her a charmingly disheveled, girlish look. Her large, sapphire-like eyes sparkled as they gazed up at me. Her small, glistening lips were slightly parted, offering a fleeting glimpse of her jelly-like tongue.
"Now, take out my cock yourself."
"[So that thing from earlier is called a cock?]"
"Well, cock, dick, shaft... there are many names for it."
"[Dick! That sounds kind of cute!]"
Even as my lust flared, her pure, innocent remarks threatened to deflate my erection slightly.
"You can pull it out with your hands, but some people like it when you use your mouth."
"[With my mouth?]"
"Yeah. You pull down the pants with your teeth and take the cock into your mouth."
"[Hmm... I don't really get it. I'll just pull your pants down first, okay?]"
Looking thoroughly puzzled, Undine reached out with her fluid hands, grabbed the waistband of my trousers, and yanked them down without a shred of hesitation.
My shaft was instantly exposed to the cool air of the passage. As I looked down at her, Undine met my eyes and asked again.
"[What do I do next?]"
"First, wrap your hand around it and stroke it gently to make it bigger."
"[Ah! So it grows when I hold it. Now that you mention it, it's way smaller than it was earlier.]"
Her cool, jelly-like hand wrapped around my shaft. Her grip was surprisingly firm, but the pressure felt incredibly good.
"[It's kind of cute~]"
Watching my dick swell in her hand, Undine didn't even wait for my instruction. She darted her tongue out and gave the glans a soft lick.
"[Slurp... Mmm, it's sweet...]"
She licked up the glistening pre-cum and smiled brightly. Gripping my shaft with both hands, she eagerly lapped at the fluid on the tip like a child licking honey. Even without being taught, her memory of the taste drove her to act instinctively.
"Now, try stroking it while you lick."
"[Whoa... It's so big...]"
The sensation of her cool tongue teasing the sensitive tip sent waves of pleasure through me, causing my urethra to twitch and weep more fluid.
"[Slurp, slurp... Mmm...]"
As she looked up at me with her wide, questioning eyes, as if asking if she was doing a good job, I couldn't contain myself. I reached down and placed both hands on her head.
Her eyebrows twitched in surprise at the sudden touch, but she didn't pull away. Deciding this was safe, she resumed flicking her tongue rapidly, teasing the tip of my cock.
"Now, put it in your mouth."
"[In my mouth? Like this?]"
Opening her mouth wide, Undine gently parted her lips and took the tip in. Her small mouth could barely fit half of the glans. Ignoring the pleasant vibration of her voice against my skin, I gave another command.
"Take it in a little deeper."
"[Mgh... Hahp, hahp.]"
Like a child eating a chocolate stick, she stretched her small lips wide and slowly, bit by bit, swallowed my shaft. First the glans, then the shaft—her lips slid down smoothly until they came to a halt halfway down.
I gently stroked her hair and whispered.
"Now, move your tongue while sliding your mouth up and down."