Penis Toothbrush (1)
The next morning. The instant I opened my eyes in bed, a wave of dread washed over me at the thought of what fresh insanity the day might bring.
...I wonder what ridiculous thing is going to happen today…
For the past two days, my mornings had begun with my naked little sister barging through the door. She had become the very first warning that the world had gone completely wrong. Tense, and—if I was honest with myself—maybe a little excited, I waited for her to throw my bedroom door open.
Thump. Thump. Thump.
The sound of my sister’s footsteps after her shower echoed down the hall. I squeezed my eyes shut, body wound tight.
Thump. Thump. Thump.
…
But she didn’t open my door. She simply walked past it and disappeared into her own room—the exact same routine as before any Common Sense Alteration had ever occurred.
Huh…? Does that mean today might actually be normal?
Feeling strangely disappointed, I cautiously cracked my door and stepped out. From behind my sister’s firmly closed door came the loud hum of a hair dryer.
Just to be sure, I called out from the hallway.
“Seoa, did you eat breakfast?”
The rude girl clearly heard me yet completely ignored the question, focusing only on drying her hair.
…Okay. That settles it. Today really is a completely ordinary day with no changes whatsoever.
I rubbed my forehead, let out a long sigh, and headed to the living room. My parents, who left for work early, had set out a steaming breakfast on the table. The rice bowl meant for my sister was still completely full, which meant she hadn’t eaten either. She often skipped breakfast when she was in a rush, so I was used to eating alone.
With some time left before I had to leave for the academy, I sat down, scrolled through my phone, and absently picked at my food.
A moment later my sister burst out of her room and marched straight to the table. Unfortunately she was fully dressed—no nudity in sight. Seeing that, I finally breathed a genuine sigh of relief.
…Yeah. This is how things should be. The last two days were just some divine prank at my expense.
With that thought in mind, I smiled awkwardly and spoke to her.
“…Sit down and eat quickly or you’ll be late.”
“Yeah.”
She answered in her usual curt, grumpy tone, took a few half-hearted bites, then immediately stood back up.
“You’re not eating more? There’s still a lot left…”
“I’m late. No time. Eat mine.”
She shoved her rice bowl toward me, then dashed back to her room and pressed the heated curling iron to her hair.
Thinking I might finally enjoy a peaceful day, I relaxed and ate at my leisure.
…If the world has gone back to normal, does that mean the missing male students will return too? I wonder how that works…
Right as that thought crossed my mind—
“…Oppa, what are you doing? I’m late. Get over here. Now.”
My sister’s irritated voice made me freeze mid-bite.
“…Huh? M-me?”
“Who else would I be calling Oppa? Ugh, I said I’m late—don’t make me repeat myself!”
When she raised her voice in genuine anger, I scrambled to my feet and headed to her room in a daze.
Wait… what? She almost never does this… Why is she calling me?
When she was much younger I had helped her put on a bra if we were running late, but now that she was grown, asking me to do anything like that was unthinkable. Completely confused about why she needed me, I stepped inside.
“…Why did you call me, Seoa?”
I asked carefully. She was still curling her hair in front of the mirror. She shot me a sharp glare, then abruptly dropped her gaze to my crotch.
I instinctively felt threatened, covered my groin with both hands, and stammered.
“U-um… why are you looking there…”
“Aish, how many times do I have to say I’m late?! Stop stalling and take your dick out already! I have to brush my teeth before I leave!”
When she finally exploded, I panicked and yanked my pants down, pulling out my rock-hard erection.
Without missing a beat, my sister abandoned her curling iron, roughly grabbed my dick, dropped to her knees with a thud, and shoved it straight into her mouth. She immediately began rubbing the head against every corner of her mouth like she was brushing her teeth.
“Mmph… mph… ugh… slurp… smack.”
“Ugh… kgh… haa… haa…”
Face burning, I stared down at my little sister as she diligently used my penis like a toothbrush.
This can’t be happening… So today isn’t normal either? Don’t tell me the new common sense is that my penis is a “toothbrush” now…
With a slight frown and her eyes closed, she focused entirely on the task. The tip of my dick scraped across her cheeks, teeth, tongue, and the roof of her mouth, sending waves of obscene pleasure and immoral thrill flooding through my brain.
“Khh… ngh… ah…”
Without thinking, I placed both hands on her head and pulled her closer, moaning. She glanced up with a hint of annoyance but didn’t complain. Instead she pushed me even deeper, scrubbing vigorously against the back of her throat.
“Ugh… hup… ngh… glurk… gulp… chup…”
Before long she was taking me in a full-on deepthroat, my length plunging into her throat and stirring it thoroughly. Her face turned bright red, brows furrowed tight as she held her breath—then suddenly yanked me out and snapped.
“Ugh, Oppa, do you actually want to die? I told you I’m late! When the hell are you going to cum?!”
“E-ehh…? C-cum…? In your mouth…?”
I stared at her, stunned. She looked at me like I was an idiot.
“Obviously. It has to foam up so I can rinse! Hurry up and do it again! If you waste any more time I’m seriously going to hit you!”
Without waiting, she shoved my dick back into her mouth and resumed the blowjob. Her cheeks bulged like a hamster’s, stuffed full of me. The sight was both adorable and unbearably perverse.
“Khh… haa… hah… ahh… kht…”
Her clumsy technique meant her teeth kept grazing me, sending little chills down my spine, but even that felt erotic. If this was toothbrushing, teeth touching my dick was only natural.
“Ugh, ughk, mp, ughmp… hup.”
Eyes wide and glaring at me as if demanding I finish quickly, she forced me down her throat again in a relentless deepthroat. The urge to cum rose fast. I gripped her hair tightly, thighs trembling.
“Kugh… ngh… ah… I’m… I’m cumming…”
She opened her mouth wide, tongue stretched out and curling around my shaft like an invitation. The lewd sight pushed me over the edge. I erupted straight into her mouth, thick semen bubbling out in heavy spurts.
“Ugh!! Ah!! Ooh!! O-oooooh…!!! Hah…”
Yellowish cum mixed with precum filled her mouth, forming a vulgar pool. She closed her long-lashed eyes, savoring the taste as she swished it around for nearly a full minute before finally swallowing with an audible gulp. Then she licked every last drop leaking from the tip, cleaning me thoroughly.
As a final touch, she stuck her tongue all the way out and rubbed the hypersensitive glans against it, polishing every inch. Each movement was so shamelessly obscene I could barely contain my arousal.
“Haa… haa… haa… kht… ah…”
Finally she gave the head one last firm bite with her molars to squeeze out the rest, then pulled away. She licked the stray semen from the corner of her mouth and stood up, snapping at me grumpily.
“…What are you still doing here? Get out so I can finish getting ready.”
“U-uhh…”
I debated whether to tell her about the curly pubic hair stuck to her cheek, but decided that lingering would only make her angrier. I bolted from the room.
Back in my own room, I braced my hands on my knees, panting hard.
“Hah… hah… hah… I’m so fucked… A toothbrush, of all things…”
Checking the clock, I realized I needed to leave for the academy too. I rushed through my preparations and arrived without being late—in fact, I seemed to be earlier than usual.
The classroom was completely empty except for me. Exhausted, I slumped over my desk. Then the door rattled open. I lifted my head.
To my surprise, it was the homeroom teacher. She still had a skincare headband wrapped around her forehead and her hair tied back, as if she’d been in the middle of her morning routine. The moment she saw me she flinched.
“Oh…! Yejun, you’re here early?”
“Ah, good morning, teacher.”
I greeted her politely. She flashed a bright smile, clapped her hands together, and said,
“…Perfect timing. I pulled an all-nighter on overtime yesterday and didn’t get to brush my teeth. Can I borrow your penis for a moment…?”
“E-ehh…”
A chill ran down my spine as my eyes widened in shock.