"Oh? H-Hanna?"
"Hold on a second, let me fix the strap."
Ignoring Seon-ah's protest lightly, I pressed my middle and ring fingers against her vulva.
...It was moist, sticky, and above all, incredibly hot.
And my fingers, feeling the flesh of her vulva, were the same.
"Just bear with it for a moment. The strap is caught here, and as it is, it might be uncomfortable for you when you move."
"Y-yes... Hngh..."
As I pretended to adjust the strap, I intentionally rubbed her vulval flesh, and a sound that seemed like a sob escaped her.
I disregarded it and spread her vulval flesh wide to the sides.
With a squelch, Seon-ah's warm inner flesh and the black strap soaked in her secretion came into view.
The liquid flowing from her vaginal entrance traveled down the thong, pooling visibly and then, unable to bear the weight, dropped with a plop.
Watching it made me feel a subtle thirst in my throat.
"H-Hanna... Hurry..."
"Alright, hold on."
In response to Seon-ah's urging words, I gently released the vulval flesh I had spread with my fingers.
Seon-ah's vulva quickly closed up again, eagerly devouring the black strap that crossed through its center.
It was almost as if it was a living creature, complete with drooling.
"Uh, how did it go?"
"Well… just spreading your vulva doesn't seem to solve the issue."
"My, my vulva... Anyway, let's just stop now... ugh!"
With a sharp flick—
I pulled the strap being devoured by her vulva down, letting it snap back into place with a light sound.
The black strap slipped back into her vulva, as if it was where it naturally belonged.
Pull, release.
Pull, release.
Pull, release.
Snap- snap- snap- snap-
"Hah... ahh! Oh, ah, haah..."
The sound of moist skin being lightly slapped echoed, as Seon-ah's sweet moans teased my ears.
In addition, for some reason, her vulva was gradually moving closer to me.
I glanced up to see Lee Seon-ah leaning toward me, bending her back, and gripping the toilet with both arms extended behind her.
She wore a foolish expression, drooling with her mouth wide open, staring at the ceiling with unfocused eyes.
As a response to showing such a face, I pulled the lower strap further down than before.
By this point, the waistband should have slipped off, but her wide hips perfect for giving birth wouldn't allow it.
Thanks to that, the waistband, previously forming a straight line, was now precariously stretched into a V-shape.
With the irritation to her vulva gone, Seon-ah, who had been blankly staring at the ceiling, looked down at me.
And then, at that moment, I let go of the hand holding the taut strap.
Splat-!
"Aghhh!"
With a grand moan unlike any I'd heard before, Seon-ah reached her climax, squirting clear fluid from her vulva.
Her body, arched and contorted, twitched and shivered with small convulsions.
And I had to face the consequences of bringing her to a peak so hastily.
"…."
…Receiving Seon-ah's climax on my face felt almost like a reward.
I slightly stuck out my tongue and licked the fluid near my lips, savoring it in my mouth.
...It had a rather erotic taste.
I took out a wet wipe from the bag hanging on the stall door and carefully cleaned my face.
I brought it to my nose.
Amidst the gentle lemon scent of the wet wipe, I could smell Seon-ah's sensual aroma.
After filling the depths of my lungs with her scent, I neatly folded the wet wipe and placed it in a plastic bag.
Once I had roughly tidied things up and turned around,
"Hah, hah... hah..."
I saw Seon-ah slumped over the toilet, panting heavily.
Between her thick thighs, which were now splayed open due to exhaustion, I could see her reddened vulva.
Her perineum, as well as her anus, was moist from the fluids.
I took out another wet wipe from the bag.
I pressed it against Seon-ah's vulva and rubbed it roughly.
Seon-ah began making strange sounds like "Hee-it, hee-it" again as her waist shivered.
It's music to my ears.
Why not? When a friend is hand-cleaning something so neglected, there should be some reward.
But no matter how much I wiped her vulva, it wouldn't dry.
What is this? Is it more of an unending spring than just a vulva?
I decided to give up on her perpetually damp vulva and only wiped the fluids that had flowed underneath.
After pondering for a moment while holding the wet wipe, I eventually threw it in the trash.
"Hah... hah..."
I looked contentedly at Seon-ah's chest, heaving up and down, before checking the time on my phone.
It's about time to go home.
"Seon-ah, we need to leave now.
...Lee Seon-ah?"
"Uh, uh-huh..."
Seon-ah struggled to her feet and began to put her school uniform skirt back on.
Judging by the lack of questions about the state of her thong, she seemed to have completely forgotten what all the fuss was about.
...That works out just fine for me.
As we exited the restroom together, Cha Eunjeong, who had been looking at her phone next to the door, turned her head towards us.
"I wanted to see, too. The thong..."
Cha Eunjeong looked rather aggrieved.
Still, since she wasn't asking what went on inside, she seemed to have a rough idea.
Surely missing that spectacular view is like losing half your life.
Of course, you can see it anytime if you want.
I considered briefly lifting Seon-ah's skirt to show the thong but decided against it.
There's no visible CCTV around, but if there's a hidden security camera, it'd be a big problem.
Instead, I handed her the panties Seon-ah had worn.
"Oh? This..."
"Ah..."
Cha Eunjeong, with a greedy look in her eyes as she held the damp white panties in her hand, and Lee Seon-ah, opening her eyes wide like a startled rabbit upon seeing her own panties in Eunjeong's hand.
As Seon-ah quickly tried to snatch back her panties, I swiftly blocked her hand with a tap.
"Since today is your first day wearing new panties, get used to it by just wearing them all day. If I return these panties, you might change midway through the day, so I'm confiscating them."
Upon hearing my words, Lee Seon-ah looked utterly despondent.
Even such an appearance was undeniably adorable.
"So, shall I keep these?" Eunjeong asked.
"Yes."
Eunjeong giggled and stuffed Seon-ah's panties into her own pocket.
Honestly, this was not a behavior one would expect from a girl.
"So then... how should we get back? I'm still scared to take the subway wearing this kind of thing..."
"It's okay. After all that happened, do you really think I'd let you take the subway again? Let's take a taxi home."
"Oh, then I'll call a cab. I can do that."
Thinking about what had happened earlier in the day, I consoled Seon-ah, whose body had become tense, as we exited the department store.
The sun was setting, tinting the city with a crimson hue.
As I wrapped my arms around Seon-ah's waist, she gently leaned into me.
With the glow of the sunset enveloping her, Seon-ah sparkled so much... she seemed otherworldly and incredibly beautiful.
"Lee Seon-ah, take this."
"Hmm? Oh, okay."
I accepted the shopping bag Eunjeong handed to me.
Were these the clothes we bought earlier?
"I've put in the clothes and an extra pair of string panties. Keep them safe at home, as we'll use them for the test."
"...Okay."
A super mini skirt, hot pants that were practically like panties, a super tight mini dress, and so on...
Just thinking about the contents made me dizzy, so I quickly stuffed the shopping bag into my bag.
After that, Eunjeong left first, saying she had another appointment.
But why is Hanna still here?
"...This."
"What's this?"
Hanna handed me another shopping bag.
I took a quick look inside and found an eye mask, handcuffs, a vibrator, and other SM items... along with a large black box.
What is this now?
"That box is for later, so don't open it under any circumstances. Got it?"
I nodded, listening to Hanna's serious warning.
If I have to go through with it anyway, it might be better to not know everything until the time comes.
After parting ways with Hanna, I headed home.
...The unfamiliar sensation of the skirt brushing against my bare skin was strange.
Moreover, with every step I took, the string pressing into my vulva dug in, and the beads rubbed against me, stimulating my clitoris and labia.
"Ugh..."
I drew my legs inward, cautiously taking one step at a time.
As a result, the stimulation between my legs intensified, and my already heated, soaking wet vulva started to buzz.
I tried to suppress the urge to let out a sweet sigh as I continued walking, aware of the stares directed at me.
These weren't just casual glances; they were truly lascivious gazes.
Still, I could understand.
Because in my current state, I must look like a dog in heat.
If this is how I feel, I can only imagine how others must perceive me.
Could they possibly notice that I'm wearing this kind of underwear under my skirt?
If they find out, how would they look at me?
Would it be with eyes full of contempt, or eyes filled with lust?
What if someone reports me to the police and the whole world finds out that I'm such a lewd person?
Worse still, because I'm this kind of lewd person, someone might drag me into a deserted back alley and forcibly assault me.
Even if I say no, they would touch me against my will, threaten to spread photos at the Academy,
While I'm gagged with panties soaked in my own fluids, they would surround me...
...My body started to heat up even more.
As I walked, torn between wanting to show more of this perverse side of myself and not wanting to be exposed at all,
I found myself, before I knew it, in front of my house.
For some reason, feeling something damp, I looked down and saw that the fluid flowing from my crotch had run down my thighs to my knees.
What... what on earth have I done?