This Must Be Your Weak Spot
"This must be your weak spot, huh? 'Should we take off your pants and panties too?'"
The moment I heard Ye-eun Seo's words, my brain just flatlined. What the hell kind of nonsense was this?
"W-what?!"
"I already taught you how to take care of your breasts, so now I'm gonna show you how to manage the important part down there."
"Th-that's not what I...!"
Taking off my top and bra to measure my bust size? Fine, that made sense. You had to undress to get an accurate measurement. Even using a ruler to poke and prod at my breasts—that could pass too. It felt a bit pervy, but you couldn't just eyeball something like that.
But telling me to take off my pants and panties? That was a whole different story!
"Eung, Seo-jin was a guy not long ago, so maybe 'pussy' feels more natural to you?"
"Th-that's not the point! Why would you even... and why teach me that now?"
"Because you need to know. Don't you trust your unnie?"
Ye-eun flashed a lewd grin as she leaned in closer. I instinctively covered my chest with both hands and scooted back into the corner of the bed. Dangerous. That crazy girl had completely lost it.
"No, this is too much. You're joking too far...?"
"Joking?~ I'm dead serious right now, Seo-jin-ah."
Ye-eun perched on the edge of the bed, staring right at me. The sly smirk from before was gone, replaced by a voice so calm and earnest it sent chills down my spine, filling the room.
"A woman's genitals are totally different from a guy's. They're not sticking out—they're folded inside. If you don't take proper care of it, it gets damp fast and bacteria breed like crazy."
"R-really...?"
"Totally.~ And if you get an infection down there? Oh god, don't even get me started. You're in for hell."
"I see.... Can't you just, like, wash it?"
"See? You know nothing. You're new to this girl body, so you wouldn't get it, but this is important. Best to learn it properly now."
Her eyes were brimming with utter conviction, her voice dead serious without a hint of playfulness. I couldn't even muster a retort.
Come to think of it, I hadn't really touched down there while washing up lately.
Not being used to this new body made it feel awkward and kinda scary.
And recently, my groin had been itchy. Every time I stood in front of Ye-eun, it throbbed and some weird fluid leaked out.
Was it really because I wasn't cleaning it right, like she said?
"So, wanna learn?"
"...Hah, fine. Whatever."
"Yay~! Should've said that sooner."
In the end, I admitted defeat and slowly slid my pants and panties down.
The thin fabric pooling at my ankles hit me with a thick wave of humiliation.
Showing my most private parts to someone who used to be the same sex as my old self—not even a week ago.
And Ye-eun's casual reaction made it feel like I was the only one embarrassed, burning my cheeks even hotter.
"Alright, let's head to the bathroom. I'll show you step by step."
"Eung...."
Ye-eun grabbed my now-naked hand and led me to the bathroom.
Unlike the one at my place, the bathroom attached to her room was surprisingly spacious—practically hotel-sized. I hesitated in shock at the entrance, and she laughed, pushing my back.
"Come on, Seo-jin. Enter~."
"Eek...! W-wait a sec."
Pushed by her hand, I stepped inside—and a massive full-length mirror unfolded before me.
The reflection staring back was so alien, like it wasn't me at all.
Slim shoulders, a cinched waist, and those heavy 70D-cup breasts asserting their presence in stark contrast. Finally, the unfamiliar slit between my smooth legs trailing down from my waistline.
It was my body, but it felt like peeking at some other woman's nudity—heat rushed to my face.
"Wow, Seo-jin's body is seriously pretty. Way tastier-looking than when you were a guy."
"Huh? What'd you just say...?"
"Nothing~ Just that your body's gorgeous. Now, I'll explain slowly, so come on in."
I swore I heard some weird word just now.
Before I could respond, she yanked my hand, pulling me deeper into the bathroom. I sat on the shower stool as she guided me, and she approached with the showerhead and a scrubby pouf.
She looked ready to baby me through every single step, so I snatched the pouf from her in horror.
"I'll... do this myself. I know how to wash."
"Okay? Got it, Seo-jin-ah. Then I'll just guide you on the important parts."
"Eung.... Yeah, thanks."
Surprisingly, Ye-eun handed over the showerhead and pouf without fuss, stepping back.
Her gaze felt heavy and leering as she watched, but I didn't have the guts to call her out in this situation.
In the end, I was stuck bathing under someone's intense scrutiny—an awkward ordeal.
"Ugh, nng...."
"Eung~? All done, Seo-jin-ah?"
"D-don't rush me! I'm going slow."
"Gotcha~. Take all the time you need."
"Ugh... How did it come to this...."
I sighed, laboriously soaping up my body. The body wash scent enveloped me like a flower field—then I set down the pouf and reached for the showerhead to rinse off.
"Hold up."
"Huh? Uh, wha—?!"
Ye-eun sidled up and snatched my hand mid-reach.
Startled by the sudden touch, I turned—and gaped at her. I hadn't noticed her undress, but she was stark naked too, staring at me.
"Looks like you're all clean now. Mind if I help, Seo-jin-ah?"
"Y-yeah.... Go ahead."
"Thanks~! Let's start right away."
With my okay, she slipped into the shower stall behind me, pressing her body flush against mine and turning on the water.
Warm streams soaked me down.
"Seo-jin-ah, know what girls like you need to watch out for?"
"Wh-what...?"
"These big ol' breasts. Girls with chests your size gotta manage 'em well. The weight makes your lymph nodes clump up easy."
Ye-eun grinned, sliding her hands toward my chest.
So close that a tiny shift forward would make contact—like she was primed to grope at any permission.
"Seemed a bit clumped earlier. Want me to loosen it up?"
"R-right now... loosen it?"
"Yup~. No funny business, just a real massage. Sound good?"
As if I could trust that.
Her words dripped with lewd intent—obviously, I should shut it down flat. But nothing refusing came out of my mouth.
My breasts were feeling tight and lumpy, like she said.
Maybe just this once... The thought flashed through my mind, and before reason could kick in, my head nodded.
"Hehe, good~. You gave permission, Seo-jin-ah."
"Y-yeah... Ahng?!"
Ye-eun grabbed my whole breast in her big hand, slowly rubbing with her palm's warmth.
The heavy mounds shifted and jiggled with her motions.
"Hng, ugh... Ye-eun-ah, not there...."
"Feels good, right? It's just releasing the tension."
"I-it's... haa?!"
"Seriously knotted up~. Gotta do it properly."
She ramped up, kneading my breasts harder.
Way too blatant for "just a massage"—pure lewd desire in every stroke.
Instinct and reason screamed her impure motives, but I couldn't push her away.
The sensations were irresistible. My head heated up with every palm rub; shivers raced through me each time her fingertips grazed my nipples.
"Haaang...! W-wait, stooop.... This feels weird...."
"Weird? I'm just massaging."
"B-but.... Hngg! S-stop....!"
"Hmm, won't cut it. We'll finish this later—time for the next lesson."
"Hnggg...."
Ye-eun sighed regretfully, then pinched and twisted my nipple lightly.
Just as relief washed over me thinking it was over, the sharp jolt pierced straight through me.
I twisted my waist, moaning involuntarily in electric thrill.
My legs shook like crazy, but she casually led me out of the shower and sat me on the bathroom stool.
"Listen up. This next part's the most important."
"M-most... important?"
"Yeah, pay close attention."
Ye-eun stood, grabbing a small white plastic tub from the shelf. Elegant script read "Feminine Wash."
She squirted the clear gel into her hand and reached between my legs.
"Unlike the rest of your body, never use soap on your pussy. The mucous membranes are sensitive—you need a special product."
"W-wait, hold on...."
"First, gently foam up the outer labia like this...."
"Hng?!"
Her fingers softly stroked between my groin.
My body stiffened at the foreign sensation, but Ye-eun kept explaining unfazed.
"Then spread a bit and clean inside the inner labia. That's where gunk builds up most."
"Haa, ugh.... I-is that right...?"
"Exactly. And up top here, that little bean-like part? That's your clitoris."
Ye-eun's finger touched the tiny hidden nub inside my slit.
My body jolted; a scream-moan escaped me.
"Heek?!"
"Oh my, this must be your weak spot, Seo-jin-ah~. Your body jumped just from a light touch."
"W-wait... hng?! Not thereee...!!"
Ye-eun giggled mischievously, persistently rubbing the spot she called my clitoris.
A brain-melting wave of pleasure crashed over me.
A sharp sensation I'd never felt as a guy—all my nerves converging on that one point.
This is seriously weird.
"Heek...! Hng, haaang...!!"
"Seo-jin-ah, you're super sensitive, huh? Didn't expect such a great reaction from a little teasing."
"S-stop... hng?! Stooop...."
"Girls like you have a special way to feel even better...."
Ye-eun whispered right in my ear, lips brushing close.
My head spun, body burning, but her voice cut through crystal clear.
"Wanna know? Interested?"
"N-ng...."
Dazed by the strangely tempting offer, I lifted my head to think—just then, a loud doorbell blared from outside the bathroom.
The noise echoed huge enough to reach us; Ye-eun paused regretfully, checking her phone.
"Ah, it's Hye-won. She's here and banging for me to open the door."
"Hng...."
"Too bad—guess we stop here for today."
She grabbed the showerhead, rinsing the remaining foam from my body, then tossed me a towel.
"But if you get curious later, tell me. I can teach you something way better."
"N-ng...."
"Take your time cleaning up and come out. I'll be waiting~."
Ye-eun beamed and sauntered out.
The bathroom, left with just me, still steamed thickly.