Even Today, the Genius High School Programmer Cashes In on Day Trades, Completely Flustered by Beautiful Girls' Growing Affection. - Chapter 18: Catastrophe!
Catastrophe!
After about an hour of splashing around…
“Okay~ Let’s go ride that one now!”
Yamano pointed upward.
There it towered—the Giant Swing, gleaming under the lights.
The starting point sat at the very top of the tower, easily forty meters high.
Up to six people could pile onto a round, inner-tube-like float roughly four meters across.
It would glide through three gentle curves at first, then plunge sharply, swinging wildly left and right once each before blasting straight into the water at the exit.
And apparently the final drop was engineered so that two or three riders were guaranteed to get flung off the float.
“Ehh—w-we’re going already?” Sakuraba shrank back visibly.
She wasn’t great with scream rides, it seemed.
“But it’ll get super crowded in the afternoon. Better hit it now while the line’s short,” Ryuusenji said calmly.
She, on the other hand, appeared perfectly fine with thrill rides.
In the end we decided to just try it once.
The five of us climbed the stairs toward the forty-meter summit.
The wait wasn’t bad; our turn came quickly.
We claimed the entire float for ourselves.
The attendant sent us off with a huge grin and an enthusiastic “Have fuuuun~!” while waving both hands.
Ryuusenji and Yamano waved back cheerfully.
Sakuraba, though, looked like she had zero composure left—her face had gone noticeably pale.
The float carrying all five of us began its slow slide forward.
It took the first three easy curves at a leisurely pace… then plunged into the first big swing.
That stomach-dropping roller-coaster sensation hit hard.
The girls let out piercing “Kyaaaaahhh!” screams as we fell, climbed again, reached the peak—and then, pendulum-like, dropped once more toward the exit.
ZABOOOOOM!
A massive splash erupted as the float slammed into the water.
The impact hurled me clean off.
I flipped upside-down underwater, disoriented.
Apparently I’d been selected as one of the “ejection victims.”
Breath burned in my lungs.
Bubbles streamed upward past my face in slow motion—it was oddly mesmerizing.
I thrashed toward the surface on pure instinct.
Pwahh!
I broke through, gasping—and right beside me, another survivor did the same.
Sakuraba.
We locked eyes with only our heads above water, exchanging weak, rueful smiles.
“Rough ride, huh,” I said, slowly standing up in the shallows.
“Nooo—never again! Never ever!”
Still half-crying, Sakuraba rose too, moving carefully.
And that was when the real disaster struck.
As she stood, one entire side of her tiny bikini top had slipped completely aside.
A full, textbook “polori.”
The violent rush of water during the ejection must have shoved the fabric out of place.
Or maybe… the sheer weight had simply been too much?
Weight of what, exactly?
I tried—with iron willpower—to avert my gaze.
Unfortunately, my eyeballs lost that battle in about half a second.
For one fleeting instant, the entirety of her perfectly shaped left breast—plump, snow-white, impossibly soft-looking, right down to the beautifully colored tip—was seared into my mind like a high-resolution photograph.
Roughly one second passed from the moment she stood.
Then she noticed.
“Kyaaaaaaaaaaahhh!!”
Today’s loudest scream yet.
She plunged straight back underwater.
Turning her back to me, she used both hands to frantically adjust—pushing, tugging, restoring everything to its proper place.
“…Did you see?” she asked over her shoulder, glaring with teary, half-lidded eyes.
I searched for the optimal response in record time.
“Hm? See what?”
That was the only viable path: play dumb.
No alternatives existed.
“You really didn’t see anything?”
“I mean… what? Did your swimsuit get swept away or something…? It looks fine to me.”
She still didn’t seem fully convinced, but after a weak “N-no, it’s nothing…” she finally stood again.
“Yukina, what’s wrong?”
“What happened? You okay?”
Ryuusenji and Yamano hurried over, concerned.
Sakuraba answered in a small, listless voice—“I-it’s nothing, really”—and we slowly made our way out of the pool together.
I kept my expression neutral on the surface.
But inside, my heart was still hammering like crazy.
For the first time in my life, I had seen a woman’s bare breast.
Just one side… but it belonged to Yukihime herself.
The fabric really had been criminally small compared to the size it was trying to contain…
I couldn’t stop replaying the overwhelming image in my head as that thought drifted through my mind.





































