Sex Education
On the fifth day, after clocking out, a text came in from the Team Leader.

The five-star hotel bed on that fifth evening after work was unbelievably soft.
It was our first meeting as partners.
"Want to go wash up?"
The Team Leader's outfit was nothing like what she wore at the office. A tight black lace dress hugged every voluptuous curve of her body. Above the bust and along the arms, sheer fabric lent her a faintly mysterious air.
Her hair was swept up, letting a pure white line of throat fall clean and straight. Her eyes looked more alluring than usual—an expensive, model-like makeup that made her face look high-end and deliberate. A slightly nude red matte lipstick sat on her mouth, the plush kind that was trending these days.
I walked slowly into the suite bathroom and began washing myself with care. Without warning her naked body pressed against me from behind.
"Haaah—!"
"Stay still."
She snatched the shower head from me, doused me with water, then ran both slick, body-wash-coated hands over every inch of my skin.
"Your lines are pretty."
While she spoke she slowly fondled my nipples, then pinched and tugged them.
"Cute little nipples too."
"Haaah—!"
A moan slipped out of me before I could stop it.
Then her fingers drifted to my most private place… from behind.
"Yerim, this is part of the job too."
"Y-yes… yes…"
I already loved her so completely that I had handed over every part of my body. Soft fingers slipped slowly inside me, stirring, then pressing harder and harder with growing force.
In front, my little cock began to rise, spinning clear threads of precome. Her other hand found it, caressed it with exquisite gentleness, then closed around it carefully and began to work it in earnest.
Feverish heat flooded my whole body. Breath and cries slapped against the bathroom tiles and scattered.
"Ah! Ah! No, this feels weird!"
"Now you know what receptive penetration is."
I couldn't have called it harassment even if I wanted to—the pleasure was far too fierce and tangled up with everything else. While she churned my insides she kept tormenting that hypersensitive place—
"Does your clit-dick feel good too?"
"N-no… no…"
"It's so small. Practically the same thing."
She brought her tongue to my ear and licked slowly, quietly, deep inside it.
Sticky, wet sounds filled my hearing—vulgar and obscenely hot—while that warm, soft tongue caressed the shell of my ear.
"Team… Leader… I… love you…"
She went quiet for a moment, then spoke.
"Call me unnie."
"I… I can't… that…"
"It's for work."
Her hands sped up, both of them ransacking everything I was, until I felt a wave of pleasure crash through my skull.
"I… can't…"
Just as the pleasure climbed past the point of endurance she slowly spread her fingers and pulled them free.
"Call me unnie,"
"and I'll let you come."
Pride and shame felt like dust beside the sheer size of the pleasure. My tongue surrendered and forced the syllables out one by one.
"Un… nie…"
She pressed a quiet kiss to the side of my neck, then began to suck harder. Pleasure sprinted again from front and back, fireworks racing all the way to the crown of my head.
Her two fingers, growing slicker by the second, peeled open my secret flesh and hammered the soft, rice-water-wet place deep inside at a lethal tempo.
"Haaah—aah! Aah! Feels good! Ah!"
The hand working me in front walked a tightrope of variation and danger, ravishing me with hypnotic skill. More fireworks followed the first barrage. Then that front hand decided its work was done and slid up to my chest, teasing the sensitive peaks. The sudden emptiness in front might have snuffed the fire, but every organ in me was already swollen to bursting with pleasure; the fingers still thrusting behind me worked my body like it was their own toy and dragged me straight to the peak.
"Haaah—!"
Her slippery body—breasts, thighs, belly, all of it—clung to me, adding heat. I convulsed, squeezed my eyes shut against the successive blasts of ecstasy that threatened to blind me. Oxytocin and dopamine flooding every nerve ending gave me a vicious, demonic pleasure and remade my body into something that could never go back.
"Haaah—aaaaaah!"
I let out a final, raw scream and rode the pleasure that felt as if it might stop my heart. It centered in my lower belly and then overflowed through every cell in aftershocks that left me on the edge of fainting.
She held me under the warm water, then wrapped me in a plush towel and guided me to the bed.
Without thinking I knelt neatly and dried my hair. In that time Yuri, already dressed again, laid out clothes in front of me.
Women's clothes.
"You'll look pretty in these."
Pleasure still fogged my head, but I shook it without meaning to. Her honeyed tongue coaxed me again.
She slowly parted thighs sheathed in glossy stockings.
"Put them on and I'll show you."
A secret, wicked thrill surged up from deep inside me until I couldn't hold it back. I felt I could have given my body even to a demon. I carefully lifted the clothes, but I barely knew how to put them on.
Team Leader Yuri stroked me with her pure white hands and, almost casually, locked a chastity cage onto me.
"For work purposes, so you can understand a woman's heart."
"Ah…"
"And this way you'll look prettier."
Just hearing the word pretty made my lower belly twitch and heat. My head swam; I felt half-blind. That someone like me could receive Yuri's love with my whole body felt like heaven. It felt like the meaning of my life. Pleasure blazed so hard it seemed ready to smother my lungs.
Underwear softly cradled the chastity cage and drew a beautiful curve. A bra settled over my small chest and brought a strange discomfort. Soft fingers rolled the stockings up my legs; with every inch I felt myself sliding further into a place I could never return from. The tight white top above clung to my arms and faintly revealed the black lace bra beneath.
Once the wig was on, I looked every bit a woman.
True to her word she slowly spread her legs, flipped her skirt up, and untied the strings of her panties, revealing her secret flesh piece by piece.
Under the light it looked like nothing so much as a nest of obscenity. Coarse pubic hair was already soaked and plastered in strands to her folds; the red inner flesh quietly opened and closed, occasionally spurting thin threads of wetness. Just looking made my skull tingle and my lower belly pound.
"Well?"
"It's… pretty…"
"I'll give it to you as a present later."
She slowly stroked my head, then pressed it down until my mouth met that place.
"Aren't you curious about the taste too?"
The sticky, lewd scent of her flesh tickled the tip of my nose. Her pitch rose slowly over the split of her folds.
I carefully began to caress her with my tongue. My heart was racing, but I went slowly—very slowly. The hand that held my head trembled; her thighs twitched inward. Gradually her insides grew wetter.
She gently pulled my head away and laid me softly on the bed. Then she undressed, baring her entire body as she came toward me. In her hand she held the elegant dildo I had seen so many times before.
Yuri skillfully snipped Yerim's stockings and underwear open with sharp scissors. Yerim felt the fabric that had covered her body yield and open.
Yuri's long, soft fingers caressed every inch of Yerim; her brain, already pickled in earlier pleasure, immediately flooded with every chemical of ecstasy, and the same flood reached her lower body.
When both nipples were gently tended by tongue and hand, Yerim's back arched like a bow and convulsed. Yuri did not miss the opening; she slowly pushed the dildo between Yerim's legs into her secret flesh. Inner walls parted and the toy gradually became part of Yerim. It was only halfway in when Yerim's eyes already rolled back and she swallowed a moan. Even when Yerim tried to speak, Yuri simply bore down with her weight. The ridges of Yuri's false cock delivered successive, novel thrills; Yerim's opening swallowed the entire thick presence.
Yuri leaned slowly forward; her breasts hung and met Yerim's. As she continued the slow thrusts, the sensitive tips of their breasts rubbed together and sparked a quiet, heated pleasure. Yuri cast aside her usual coolness, her mockery, her teasing, and surrendered to raw desire, ravaging Yerim's mouth as if violating it. Her tongue licked and stirred the inside like a nest of pleasure until Yerim gushed and sank into endless ecstasy. The blunt tip kept stroking Yerim's soft place until a climax sharp as a blade shattered even that rapture and delivered a screaming death to every nerve. It was so close to a little death that Yerim nearly blacked out, convulsing and spurting milky fluid.
Yuri whispered softly to the still-trembling Yerim.
"Congratulations on becoming a bitch, Yerim."