I don't know why, but when I look at this, I get hot, deep in my belly...
She was not conscious of it, but her mouth was wide open. Her tongue was lolling out, and her breath came in pants.
If I put this inside me, throbbing like this, I'm sure something incredible would...
The mana had reached her brain. Despite her lack of experience, sexual thoughts came naturally to her.
But, I feel like something's missing. Something, something...
Something was lacking. Something would not fit. As she watched the twitching prick, Koyoi pondered. Then, a few beats later, it hit her:
Of course. If I want to get it in me, I've got to make it slippery first.
She put strength into her lolling tongue, and moved her face closer. His glans was right under her nose. She bent her tongue up, and tickled his urethra with the tip.
Elt's face twisted, and he let out a groan.
Aah, he looks like he feels good.
He was enjoying what she was doing. That made her enjoy it too. She wanted to do more, to do more for him, to make him enjoy it more.
"Aahmph."
She held his glans in her mouth, and pressed her tongue against the tip. Then her lips hooked on the base of his glans, and, with wet, slurping sounds, she used her entire tongue to lick around his head.
"Aaah. That's good."
This time he clearly expressed his enjoyment. Koyoi narrowed her eyes in a smile at the unaffected praise.
"Ooh, this is..."
Around the time Koyoi's lips began to slide back and forth around the base of his glans, the other monsters gathered round the pair. Their eyes sparkled with interest. It was their first time seeing a mana-infected virgin employ proficient technique. Naturally, as they had been virgins until offering their monsterized bodies to Elt, they had been down the same road themselves. Because their heads had been full of themselves and their beloved Elt at the time, however, they had not objectively understood how they had become monsters.
With more wet slurping, Koyoi was taking Elt's penis deeper inside her. Time and again his head struck her throat. Koyoi's mind grew dimmer with each impact.
Aah, this rugged touch feels so good...
Her lids were half lowered, and her eyes were clouded with lust. Now that she had been dominated by mana, even stimuli that she would ordinarily have found painful were converted to pleasure.
Elt gave a moan, then a long sigh. He had just accompanied eight monster girls in repeated sexual intercourse without a rest, but that had not rendered him insensitive to pleasure. Becoming an incubus meant a dramatic increase in stamina, to the point that he could stand up to even several days of continuous sex. The intensity of his pleasure and desire, however, were much the same as when he had been human.
Koyoi might be clumsy due to it being her first experience, but she was unconsciously unleashing technique rooted in monster instincts. It was gentle compared to Elt's wives, who had become full monsters, but it had been only a few days since he lost his virginity, and Koyoi's fellatio felt more than good enough.
"Ooh, Koyoi, I'm... cumming."
"Coming"? What is...?
"Nngh!"
Koyoi was still wondering when she experienced the answer firsthand. As his member lodged deep in her throat, and she tried to gulp down her drool and his precum, Koyoi's throat tightened. That became the finishing blow, and Elt ejaculated. His testicles pulsed, and each pulse released a large volume of semen.
"Ngh! Mmm? Ulp."
Koyoi's eyes widened in surprise. Despite her confusion, however, she poured it all into her stomach without spilling a drop. The other monster girls watched her enviously.
What is this? I'm gulping it down without thinking, but...
An instant later, a chill ran through her whole body, and with it came intense pleasure.
"Haaa!? Aah, aaaahh!"
Koyoi hugged her own shoulders, quivering. Her backside lifted into the air, and her upper body collapsed to the floor.
"Oh my, it looks like it's begun," Druella, who had been quietly watching over Koyoi from behind, laughed cheerfully. The other monsters stared with eyes full of interest.
"Oh, come to think of it, isn't this your first proper view of a girl becoming a monster?"
With a few exceptions, each of them had been alone with Elt in different places when they became monsters. It was, therefore, their first times seeing someone else become one.
"Now, what sort of monster will this girl become, I wonder," Druella murmured with an air of deep interest.
Ordinarily, a woman who became a monster became a succubus. There were also some monsters who could increase their numbers by transforming human women into monsters of their own species. With Druella, however, it was a little different. She was a lilim, one of the Overlord's daughters, and so she possessed the ability to change a human into any kind of monster.
All of the mana that now blanketed the throne room had come from Druella's body; when it was used to transform a human woman into a monster, her species would be determined by her character and personality.
First, Koyoi's hair bristled. Then, black, pointed things sprouted through it. They were thick and luxuriant like the hairs on her head, but the density of hairs on them was higher. They were triangular animal ears. Their outsides were black, matching her hair. Their insides, in contrast, were lined with white fur.
Next, something sprouted from her hips as well, bursting through her kimono. Black fur. It formed curves, thin at the base and tip, and swelling luxuriantly toward the center.
"Tee hee hee. What an adorable little fox."
Druella stroked Koyoi's new-grown tail.
"Haah!?"
Koyoi opened her eyes wide and moaned as a wave of tingling pleasure flowed into her.
"Mmm, simply adorable..."
With a smile, she rubbed the tail against her cheek.
"So, how did you like the taste?"