A week slipped through their fingers like water through a sieve—quiet, inevitable, and carrying away the days before anyone noticed.
Saturday afternoon found Kuroha Akira in his usual spot in the Kobayashi living room, hunched over his laptop with the focused intensity of a bomb disposal expert. The first volume of "My Sister is an H-Game Master?!" had entered its final sprint. Only the epilogue remained between him and completion.
The factors determining a light novel debut's success formed a constellation of variables: cover art, illustrations, marketing hype, character design, opening hook, and whether the first volume's plot actually delivered on its promises. Any weak link could sink the entire enterprise.
For his prologue opening, Kuroha had crafted something deliberately provocative—a fanservice-heavy scene establishing the brother discovering his sister's secret identity through the most embarrassing possible means.
The setup: brother plays an indie eroge game, praising it as the best he's encountered in years. Unable to suppress his... enthusiasm, he prepares for a second playthrough, only to notice the producer credits listing a single name. A name disturbingly familiar.
Enter sister, bursting into his room at the worst possible moment.
Brother connects dots: real name equals online alias equals HOLY SHIT MY SISTER MADE THIS.
Sister connects different dots: brother's hands are occupied in a way no sister should witness.
Mutual screaming. Story begins.
Kuroha still thought it was pretty solid.
But finishing the first volume's main story wasn't enough—that would leave readers satisfied but not hungry. A successful debut needed a hook that made purchasing the second volume feel less like a choice and more like a biological necessity. New characters, fresh conflicts, unexpected twists—something that burrowed into readers' brains and demanded resolution.
This required thinking ahead. The epilogue needed to set up volume two while simultaneously providing closure for volume one. Tricky, but doable with proper planning.
Fortunately, "Academic Ability S" had kept his mind humming at peak efficiency all week. No writer's block. No creative stagnation. The story's subsequent developments had unfolded in his head like origami, each fold revealing the next.
The epilogue solution arrived fully formed: reveal the sister's hidden yandere tendencies.
Throughout the main text, Kuroha had deliberately obscured her true motivation for creating eroge games. The narrative presented her as a talented creator seeking like-minded friends, with her brother joining the production of her next work. All perfectly wholesome on the surface.
But beneath that surface lurked something darker.
The sister's motive, carefully concealed until now: everything she did, she did for her brother.
After her tantrum scene, she would retrieve an old game cartridge—one her brother had secretly contributed to years ago, before being forced out of the gaming industry. She inserts it, loads his save file, and clears the final boss with practiced ease.
The credits roll, mirroring the prologue.
His name isn't listed.
She reads off the names that are listed—the people responsible for driving her brother away from the industry he loved. The people who ensured his contribution would never be recognized.
The sister makes a decision.
She will take revenge for her brother.
With that declaration as the final line of text, Kuroha typed the closing quotation mark and hit save.
Yosh! "My Sister is an H-Game Master?!" Volume One, complete!
Mmm~~~~
The sound that escaped him wasn't quite a groan or a sigh—something between relief and triumph, the vocal equivalent of collapsing after a marathon. He stretched arms overhead, feeling vertebrae pop in satisfying succession.
Is your work finished for now, Akira-kun?
Shinomiya materialized at his side with her characteristic silence, concern softening her features. She'd been orbiting him all week, a quiet presence observing his creative frenzy without interference.
Kuroha grinned, too pleased with himself to hide it. "Yeah, basically done. Just polishing and revision left—but no rush for that."
Shinomiya's smile mirrored his own, genuine warmth in her eyes. She'd witnessed every late night, every burst of typing, every muttered curse when sentences wouldn't cooperate. His victory felt partially hers.
I see... That's wonderful. A pause. Are you hungry? You skipped lunch. Should I warm something?
"Not really hungry." He paused. "It's just curry again, isn't it?"
Yes, but today it's vegetable curry! Very sweet and delicious.
Because Shinomiya couldn't handle spice, Granny Kobayashi had recently diversified their curry offerings—coconut milk curry, mild curry, extra-mild curry. But at the end of the day, it was still curry.
Did the old woman know how to cook anything else?!
Anyway, Kuroha had reached his limit. He'd tasted enough of Granny Kobayashi's curry to last several lifetimes.
Compounding the problem: a full week of the Class President's luxurious bento lunches had thoroughly spoiled his palate. When survival hunger was the only motivation, he could choke down anything. But now? Now even the thought of curry made his stomach protest.
It was true what they said—hard to go from luxury to frugality. Kuroha couldn't imagine facing school without the Class President's bento waiting at lunch. He needed to figure out how to extend that arrangement indefinitely!
"I've had enough curry..." He glanced at Shinomiya. "Hey, Shion, don't you get tired of eating it every day?"
Shinomiya tilted her head thoughtfully.
I think it's fine. I used to eat rice balls every day, so eating the same food continuously doesn't bother me.
"Uh..."
Shion. Your childhood sounds kind of tragic.
Shinomiya's mother—Fumiko, was it?—might have been a bit too perfunctory with her child-rearing. Rice balls every single day? That explained so much. No wonder Shinomiya's cup size couldn't compete with the Class President's—nutritional deficiencies during critical development years!
Kuroha wisely kept these observations to himself. Childhood topics seemed like landmines in Shinomiya's emotional territory—best to tread carefully.
His silence didn't deter her concern.
If you're tired, Akira-kun, should I massage your shoulders? You always massage my feet...
"What's with you today? You really want to take care of me, don't you?"
Nothing... It's just rare that you're home all day...
Translation: she was lonely.
Monday through Friday, Kuroha had school—hours when she couldn't see him. And recently, even when he returned home, he immediately plunged into writing, leaving minimal time for conversation. Shinomiya had insights about voice acting she wanted to share, observations about her training, but she'd held back, afraid of disturbing his flow.
She'd discovered an alternative communication method, though. One that required no words and caused no disruption.
Foot contact.
Not aggressive stomping—gentle touches, light as dragonflies. Toes tapping his instep. Calf resting against his thigh. Always with white stockings, because she'd noticed he liked those.
And every time, without fail, Kuroha would pause his work and unconsciously begin massaging her feet. Sometimes he'd even smile, commenting that it helped relax his typing-stiffened wrists.
She'd also learned to control her vocal reactions. No more strange sounds escaping involuntarily. Occasionally a breath might slip, but nothing like those first embarrassing sessions when she'd surrender instantly, unable to straighten her spine.
Now she could fully relax and enjoy his massages—foot, calf, even thigh when he got carried away.
But this progress came with side effects.
Her legs and feet had grown significantly more sensitive.
It was a complex sensation, difficult to describe. Not just skin-deep—the muscles themselves seemed to pulse with each touch, sending waves of sensation upward, spreading to... places that made her cheeks warm.
Shinomiya suspected she might need to buy more underwear. The current supply couldn't keep up with washing demands.
And she worried: if this continued, would she eventually become sensitive just from wearing socks? From walking? That would be... problematic.
What Shinomiya didn't know was that her inconspicuous S-rank talent, "Light Body Flexibility S," was actively at work. This talent granted her physical sensitivity far beyond normal parameters—and Kuroha's massages were systematically unlocking its potential.
The development of her feet and legs continued apace.
But her worries were unnecessary. She wouldn't become unable to walk, wouldn't soil floors from simple contact. Because the source of sensitivity was specifically Kuroha Akira.
Only his touch could unlock her body's potential.
Only his hands could trigger these responses.
Which meant something significant was occurring beneath the surface of their daily interactions.
Shinomiya Shion's body, under thorough and repeated massage, was slowly being remodeled.
Remodeled into a shape exclusively for Kuroha Akira.