7:00 a.m., a middle-class residential district in Tokyo.
Today was the first day of high school, but Mikogami Yuma—dressed in his school uniform—did not head straight to school. Instead, he stopped in front of the gate of the house next door.
It was a perfectly ordinary residence, no different from the surrounding homes, except for the uncommon family name engraved on the doorplate:
[Yukino]
Yuma adjusted his black-rimmed glasses and, as usual, pressed the doorbell.
The clear chime echoed through the quiet morning.
Ding-dong, ding-dong.
No answer from inside.
(Is Yukino-san still asleep? Or has she already gone out?)
Yuma frowned slightly.
According to Mira-san's request and the habit he'd formed over the past month, his neighbor—Yukino Mifuyu—should be home right now and would respond to his greeting.
That woman with snow-white long hair and a voluptuous figure that could make any teenage boy's blood boil had a personality as quiet and gentle as her name suggested—a hint of deep winter's stillness and fragility.
She always spoke softly, treated people kindly, yet there was always a faint, pity-evoking melancholy between her brows.
She had moved in a few months ago; apparently her husband had passed away young.
Mira-san, seeing her living alone and so meek, asked Yuma to help out occasionally or bring over some snacks.
After a brief silence, an inexplicable impulse drove him.
(I'm just checking if Yukino-san is safe…)
He found what seemed like a reasonable excuse for himself.
Silently activating his ability in his mind.
Among Yuma special powers, the most frequently used and most discreet was [X-Ray Vision].
The ability wasn't unlimited—he had a daily "total time" quota, and both X-ray vision and his other, even stronger ability [Time Stop] consumed from the same pool.
His vision instantly penetrated the yard and wooden door: entrance hall, corridor, living room… all empty.
His sight continued deeper like an invisible probe, sweeping through room after room.
Finally, in the master bedroom on the second floor, he found the familiar figure.
Yukino Mifuyu was indeed home.
But the scene before him made the boy's breath catch; blood seemed to rush instantly to a certain place.
The bedroom curtains weren't fully drawn; a few slanting rays of sunlight outlined the mature, maddening female body on the bed.
Yukino Mifuyu wasn't wearing her usual simple white sweater and light-blue coat, but an extremely thin black silk nightgown.
One strap had slipped down her arm, exposing vast expanses of snow-white skin. Her full breasts nearly burst free of the fabric, the alluring pink tips faintly visible beneath the sheer material.
Her sensual legs were curled—one stretched out weakly, toes pointed taut.
Her long white hair lay messily across the pillow. Yukino Mifuyu face was tilted upward, eyes tightly shut, long lashes trembling. Her cheeks were flushed an unnatural crimson.
Those beautifully shaped lips, usually lightly pressed together, were slightly parted, releasing silent, heated breaths.
"!!!"
Yuma mind buzzed as if something had exploded.
He had never expected to witness such a stimulating sight.
The neighbor who always appeared gentle, timid, and even somewhat abstinent was, in her bedroom, burning with such passionate abandon.
That utterly entranced, unsatisfied expression was the complete opposite of her usual meek demeanor.
The intense visual shock and the forbidden thrill of voyeurism acted like the strongest catalyst, instantly igniting the primal urges of a hot-blooded teenage boy.
He could clearly feel his own physical reaction—heart pounding faster, a hot surge gathering in his lower body.
(I never imagined… Yukino-san actually…)
(No, I can't keep watching…)
Reason struggled to warn him, but his gaze remained glued as if magnetized.
.....................
Yuma stood frozen in place, brain buzzing from the overwhelmingly erotic scene.
But he couldn't just leave.
Because of Mira-san's request, he came by every morning.
If he skipped today without greeting her, it would seem unusual. If asked later, he couldn't exactly say, "I didn't want to disturb Yukino-san, so I went straight to school."
He took several deep breaths, forcibly suppressing the surging blood and bodily reaction. His fingers trembled slightly as he pulled out his phone, found the contact labeled "Yukino-san," and dialed.
For some reason—whether he forgot or it was subconscious—he kept [X-Ray Vision] active.
His sight still pierced the walls, locked firmly on the enticing scene in the second-floor bedroom.
The call connected with the familiar "beep beep" tone.
The figure in his vision jolted violently!
Yukino Mifuyu seemed startled awake; her dazed eyes opened, ice-blue pupils flashing with panic.
She hurriedly searched for her phone. Seeing the caller, she relaxed slightly but didn't answer immediately.
Just as Yuma began to wonder, he watched Yukino Mifuyu—face flushed—place the phone to her ear and resume her earlier actions!
"M-Moshi moshi?" Her soft voice came through the line, but it was completely different now.
Her breathing was ragged and unnatural; every syllable trembled with barely suppressed gasps, sweet and quivering.
Through X-ray vision, Yuma clearly saw her body still subtly writhing as she spoke.
"V-Very sorry… Y-Yuma-kun?" Yukino Mifuyu seemed to try focusing, but her voice was overflowing with unnaturalness.
"I-I was just… exercising… a bit… haa… busy. Is there… something you need?"
Her explanation came in broken fragments, interspersed with faint moans—sounding more like delirious murmurs in a very specific situation.
Listening to the obviously still-indulging voice on the phone, combined with the shocking sight of her continuing while on the call, Yuma throat felt painfully dry.
(Yukino-san's desires… are this strong?)
He worked to keep his own voice steady and caring as usual:
"Good morning, Yukino-san. Nothing in particular—I just came by to say hello like always.
I rang the doorbell earlier and got no answer, so I was worried something might have happened and called to check.
Are you… all right? You sound out of breath. Was the exercise really intense?"
Hearing Yuma's voice, Yukino Mifuyu's body tensed sharply, as if the words delivered an even stronger stimulus.
"N-No, I'm fine! Haa… really fine!" Her denial was weak and soft, voice shaking hard. "I just… exercised a bit… too much… Thank you for your concern, Yuma-kun…"