"Ii tenki da naa—what a wonderful day."
Fingers threaded loosely through Sena Ajisai's, Kazama Haru stepped past the low gate of the Kazama residence and tilted his chin toward the sky, squinting against the June sun that spilled through the powerlines like warm honey.
Ajisai—the hydrangea, that quintessentially Japanese bloom that heralds the tsuyu rainy season—flowers from May into the first sticky days of July.
And the girl who bore its name, drifting a half-step behind him in the full radiance of her youth, walked with footfalls so light they barely disturbed the gravel.
Their destination lay scarcely twenty paces away—next door, in fact—the Sena family home, a modest two-story detached house painted a soft, chalky white, its shutters trimmed the pale blue of a clear summer morning. A house that, much like Ajisai herself, seemed almost too gentle to belong to this world.
After the tangled, breathless intimacy of that morning—after she had melted against him on the tatami with her lips still swollen and her collar hanging loose from her shoulder—Sena Ajisai had, in the quiet cradle of his arms, finally spilled every small grievance and half-swallowed complaint she had for so long only hinted at in passing.
—Because both her parents worked long shifts, the burden of helping her mother mind the two younger brothers had fallen almost entirely onto her slender shoulders, leaving her precious little freedom to step outside, to take a part-time job, to simply be a girl her age.
For a shoujo in the very heart of adolescence, that quiet suffocation was, without exaggeration, a genuine source of pain.
But now that she had at last laid those worries bare before him—now that he had, in every sense that mattered, become her family, the one entrusted with untangling the knots inside her chest and granting the "wishes" she scarcely dared voice—Kazama Haru could hardly pretend he had heard nothing.
And so, with today being a rare Saturday and Ave Mujica basking in a few well-earned days of rest after their live, he had resolved to accompany her home—something they hadn't done together in what felt like an eternity.
Even if outsiders might sneer that he was overstepping, meddling in another household's private affairs, he wanted to stand beside her, to speak properly with her parents, to see if he could carve out even a little more freedom for the girl he loved.
"Pardon the intrusion."
Murmuring the customary greeting in a low, well-mannered voice, Kazama Haru slipped his shoes off in the genkan and followed Ajisai inside.
Ever since starting middle school and taking on the string of demanding part-time jobs that had swallowed his afternoons, he had scarcely set foot in the Sena household outside of the major holidays—O-Bon, New Year's, the occasional birthday.
Yet given how deeply intertwined their two families had always been—close households in the truest sense—Kazama Haru felt no need to stand on ceremony. He crossed the washitsu-adjacent living room without hesitation, sank into the familiar cream-colored sofa, and let Ajisai flit off toward the kitchen to prepare drinks.
His gaze drifted lazily around the room.
Nothing had changed. Children's socks. Half-finished summer homework prints. Colored pencils rolled up against the baseboards. A plastic dinosaur guarding the leg of the kotatsu. The comfortable chaos of a house lived in by boys.
"Sorry, Haru-kun. Sorry to keep you waiting—here's your tea~"
Cradling a steaming cup of the black tea he favored, Sena Ajisai emerged from the kitchen, her long dove-brown hair catching the sunlight through the shoji screen behind her.
"I just called—it seems Mama and Papa took the good weather as an excuse to go visit relatives back in the countryside today. Of all days…"
She settled onto the sofa beside him, close enough that her thigh brushed his through the fabric of her white summer dress, her expression pinched with that soft, familiar guilt—as though his willingness to fight for her had been squandered on a wasted trip because she had failed to check the family group chat.
"Naruhodo naa. I see."
Kazama Haru took a slow sip of the still-scalding tea and smiled at her over the rim. "In that case, I suppose today I'll just have to do some… mental groundwork on the boys first."
"Eh—?"
Sena Ajisai's rose-tinted eyes widened a fraction, obviously skeptical. "Even if the boys have adored you since they were toddlers, convincing those two little tornadoes of anything is honestly not going to be easy, you know?"
"Sou kana. Wouldn't be so sure."
Kazama Haru offered her a slow, mysterious smile, one corner of his mouth tugging upward. "This mouth of mine—it might just possess the unexpected magic to persuade almost anyone."
"Aa, that I can absolutely believe," Sena Ajisai murmured, tapping a slim fingertip thoughtfully against her chin. "After all, this is a mouth that has to sweet-talk so many girls, every single day—"
"Uu…"
Sensing the conversation careening once again toward perilous territory, Kazama Haru felt that ominous premonition prickle down his spine and had just opened his mouth to defend himself when—
"Haru-nii-chan!"
A round, small-limbed figure came barreling into his field of vision like a cannonball, launching himself into Kazama Haru's chest with a squeal of pure delight.
The youngest of the Sena brothers—Sena Kippei , freshly enrolled in the first grade of elementary school.
"Hello, Kippei-chan. Did you have nice dreams last night?"
Looking down at that guileless, moon-round face, Kazama Haru couldn't help the tender smile that surfaced on his own, and he lifted a hand to ruffle the boy's downy, animal-soft hair.
"Un!" Kippei nodded so vigorously his cheeks jiggled, the lisp of a child still growing into his tongue softening his words. "Haru-nii-chan, I hadn't seen you in ages—I wanted to come next door to find you a whole bunch of times, but nee-chan kept warning me that you were super busy and I mustn't disturb your rest!"
"Hee~, is that so~"
Kazama Haru turned a knowing smile on Ajisai, whose cheeks had bloomed the color of the flower she was named for at hearing her private nagging exposed. "You really do love fussing over other people, don't you, Ajisai-nee-san?"
"H-Haru-kun, don't you start calling me that too, it's genuinely embarrassing—!"
Barely a few hours ago, she had been an all-devouring, dominant onee-san incarnate, pinning him beneath her with lips parted and tongue sliding hot and slick against his own until neither of them could remember how to breathe. And yet now, now the mere sound of that single word, nee-san, from his lips, had reduced her to a fidgeting, pink-cheeked mess.
Hou—so this is the Fallen Angel's weakness.
Yes. For a girl who had built so much of her identity around being the onee-san, the older sister, the one who nurtured and protected—being addressed as nee-san by the very boy to whom she had just, mere hours ago, offered up every hidden desire and every shameful, unspoken longing… it must ignite an almost unbearable sense of forbidden, incestuous transgression inside her.
Yabai—next time we're tangled together, I'm absolutely going to hammer this weak point until she can't string two syllables together.
Ruthlessly banishing the swell of heat that thought sent pooling low in his gut, Kazama Haru refocused his attention on the pudgy little creature currently attempting to climb him like a jungle gym.
Studying him up close, one truly couldn't help but marvel at the sheer strength of the Sena family bloodline.
The child was, in essence, a miniature shota rendition of Ajisai herself—the same silk-fine hair, the same softly-drawn eyebrows, the same doe-shaped eyes that made anyone within a two-meter radius want to spoil him rotten.
"I thought I'd misheard Kippei just now, but it really is you, Haru-nii-chan!"
While he was still cataloguing Kippei 's features, another boy—a size larger, sturdier through the shoulders—padded out of the adjoining room, his own face splitting into a delighted grin as he wormed his way into Kazama Haru's opposite arm.
"Been a while, Kouki-chan. Anything fun happen lately?"
Kazama Haru scooped Sena Kouki, third-grader and self-appointed man of the house, up onto his knee and asked after his recent adventures with the easy warmth of an older brother.
Watching the three of them nestled together in such a tender tableau, Sena Ajisai, standing a few paces off with the tea tray still hugged loosely to her chest, felt a slow, radiant smile bloom unbidden across her features.
They were back. All of them. Together again.
Back in his middle school days, before the exhausting cascade of part-time jobs had begun to steal his weekends, he used to be exactly like this—babbling Kippei balanced in the crook of one arm, an even smaller Kouki tugging insistently at the hem of his hoodie with the other, the picture of unshakable nii-chan energy.
She had never dared to hope the harmonious warmth she had so quietly missed would ever reassemble itself before her eyes.
Even if this proved to be a dream, it was a dream almost too sweet to bear.
"Ara—Ajisai-nee-san, did you get some sand in your eyes?"
Catching the way Sena Ajisai's expression had gone soft and tremulous, her lashes shimmering with the beginnings of yet another quiet overflow, Kazama Haru felt his own heart clench.
To spare her the mortification of dissolving into tears in front of her brothers, he deliberately pitched his voice into a lighthearted tease.
"Haru-kun, you baka—how could there be sand inside the house? And I told you, stop calling me nee-san—!"
Reading his intention with the perfect telepathy of two people who had grown up side by side, Sena Ajisai swallowed the lump in her throat, forced the swelling emotion back down beneath her ribs, and shot him a glare of the flimsiest reproach.
"Nee, nee, Haru-nii-chan, you finally came over, forget about the sand—!"
Wriggling free of Kazama Haru's arm, Kouki scampered across the tatami to the drawer beneath the television cabinet, yanked it open with dramatic urgency, and returned brandishing a black-and-blue PS5 game case as though it were a sacred artifact.
"This is the newest one in the Fate Summoning series—I begged Papa and Mama for literal weeks to buy it! Haru-nii-chan, you definitely haven't played it yet, right—?!"
Unfortunately, Haru-nii-chan has already fully cleared it, twice, at a certain pink-haired girl's apartment.
Despite the internal deadpan, Kazama Haru summoned an appropriately dazzled expression to gift his little brother the emotional payoff he deserved.
Taking the controller that Kippei was solemnly pressing into his palm with pudgy fingers, Kazama Haru felt a faint, familiar prickle at the back of his mind—that unusually high "Luck" stat of his beginning, subtly, to hum.
Yosh—then allow this nii-chan to demonstrate the FPS skills he has honed one blistered thumb at a time.
However, before that—Kazama Haru's gaze traveled slowly across the Lego bricks strewn like brightly-colored shrapnel across the living room floor.
"Kippei-chan, Kouki-chan. Before we start the game—could I trouble the two of you to first clean up all those blocks over there?"
"If you'll do that for me, then I'll play with you until we clear the whole thing today. Deal?"
Trading a quick glance with Sena Ajisai, whose eyes had gone round with faint astonishment, Kazama Haru smiled and calmly extended his terms to the two young lords of the Sena household.