"That... Sister Mira, what did you just say? I think I didn't hear it clearly."
Lisanna blinked, her brain nearly short-circuiting. There was no way she heard that right. Right?
"If you didn't hear clearly, just pretend I didn't say anything," Mira said with a casual smile.
"W-Wait, hold on a second!"
Lisanna suddenly panicked, her voice rising with urgency.
"No more kidding around," Mira sighed, seeing her sister wasn't in the mood for jokes. "Alright, I'll be serious now."
Mira shook her head helplessly. When it came to Rain, her once-cute little sister suddenly transformed into a headstrong mess—completely incapable of joking or thinking rationally.
"I said… I agree with what's happening between you and him."
Mira's voice was calm, but her gaze was serious.
"Eh…?"
Lisanna froze. Mira's words did bring her a small wave of joy—but confusion quickly followed. She couldn't wrap her head around it.
"Why?" she asked, her brows furrowing. "Why would you suddenly say that?"
This didn't feel like Mira at all.
Wasn't she supposed to be the terrifying older sister who'd go demon mode and crush the heads of anyone daring to lay a hand on Rain?
So why was she agreeing to this?
She actually… approved of her and Rain being together?
"Why…?" Lisanna repeated softly, almost not believing it.
Mira's expression became a little helpless. How should she even explain this?
It's not that she didn't love Rain.
Quite the opposite—she loved him deeply.
But ever since she had witnessed Rain's strength… ever since she experienced everything he was capable of… she realized something important.
Rain was constantly evolving. Growing stronger. Changing everything around him.
She couldn't stop that momentum.
And it wasn't just Lisanna anymore. Even girls like Robin and Hiyori had started showing… signs.
So what could she do?
Stopping Rain was impossible.
But guiding it?
That she could do.
Accepting Lisanna as a "little devil" was only the first step of her plan to rein in the chaos.
Mira's gaze softened as she looked at her sister—and for a moment, her lips curved into a knowing smile.
Maybe… it wouldn't be so bad to let Lisanna have her moment.
"!!!?"
Lisanna stiffened.
She didn't know if it was just her imagination…
But for some reason, she suddenly felt like she had become Sister Mira's prey.
There was a glint in Mira's eyes that made her instinctively tense up.
"Lisanna~" Mira purred sweetly, her tone dangerously gentle.
"Let me tell you… a little something."
She leaned in close.
Very close.
Her breath brushed against Lisanna's ear, warm and teasing.
And then—
Mira whispered something.
Something that would never be allowed in front of strangers.
"Poof!!"
A puff of invisible steam practically exploded out of Lisanna's head.
Her cheeks flushed bright red—not just blush, full-blown tomato mode—and her entire face started to smoke.
"Wha—?! N-No way—!! S-Sister Mira!! W-What are you even saying!?"
She looked like she was about to collapse on the spot from embarrassment.
Whatever Mira said…
It clearly wasn't wholesome.
--
That night...
It was rare for the Strauss sisters—Mira and Lisanna—to sleep in the same room again. The atmosphere was calm, the lights were soft, and the two had quietly settled down for a long-overdue sisterly chat.
Though… it felt more like a secret strategy meeting.
"So, I'm sorry, Rain," Mira said sweetly, patting Rain's shoulder like an understanding big sister. "Just rest on your own tonight, okay?"
She wore an apologetic expression.
But behind that expression… was a smile that could only be described as pure evil.
Rain: "???"
He stood there, frozen.
Why was Mira suddenly acting so nice?
Why was Lisanna blushing and refusing to meet his eyes?
And most importantly… why did he feel like something irreversible had just happened without his permission?
He didn't understand it at the time.
But he would… very soon.
In the days that followed, Rain noticed something different about Lisanna.
No—completely different.
She had changed.
The once-shy, cute little sister type had evolved into something more dangerous. She no longer just smiled from the sidelines or snuck glances at him like before.
Instead… she attacked.
Stealthily. Strategically.
She would suddenly appear at his side, brush past him with a faint "oops," or press just a little too close when handing him something.
She'd lean in during conversations, whispering with lips far too close, then run off in a flustered panic—leaving Rain with a racing heart and a confused brain.
Small benefits. Big chaos.
And it was absolutely grueling.
He didn't know if he was under attack or being seduced.
But oddly enough…
It didn't feel that bad?
Eventually, life returned to a kind of "normal."
After Rain issued a new batch of subjugation commissions, Mira resumed her usual role—taking Lisanna and Elfman along to hunt down female demons across Fiore.
And every time she came back from one of these "jobs," Mira would report the mission's outcome.
Rain, however…
He didn't just get the report.
He got the experience.
Let's just say—whatever happened with those female demons out in the field…
Rain's body ended up paying for it.
The demons themselves weren't that strong.
But their methods?
Absolutely overwhelming.
To the point that even Rain—blessed with a ridiculous physique and stamina—ended up losing a few pounds.
That's right.
The man who once took on entire armies without breaking a sweat…
Was now getting slimmer.
Because of Mira's "missions."
He was starting to wonder if he'd survive the next one.
--
Fairy Tail Guild – Underground Library
Beneath the hustle and cheer of the guildhall…
Hidden far below the boisterous clamor of laughter and beer mugs…
Lay Fairy Tail's true legacy.
A quiet, ancient space untouched by time.
The underground library.
Here, sealed away from public view, were rows upon rows of grimoires—magic tomes that recorded centuries of knowledge. They were the very foundation of the guild's existence, passed down and protected since its earliest days.
To many, it was just a dusty basement.
But to those who knew better… it was a treasure vault of potential.
With these books, anyone with the talent for magic could grow—discovering spells, techniques, and principles that could change their destiny.
Of course, not every magic could be found here.
There were simply too many types—Lost Magics, Cursed Magics, and systems from distant worlds. No one could truly gather all magic under one roof.
After a long conversation with Mira a few weeks back, Rain had come to a realization:
Not everyone could use Haki.
Without the Pirate World's Seed or some kind of "mark," it might be impossible for outsiders to awaken or even sense Haki at all.
That made things… complicated.
So, Rain came here.
To the place where knowledge slept.
To search for a workaround.
Over the course of a month, he buried himself in study.
From early morning until the lamps dimmed, Rain flipped through thick, enchanted volumes. He absorbed everything—battle spells, enchantments, theory, and unique casting systems.
Sure, he already had two powerhouse spells in his arsenal—Take Over Magic and Form Magic.
But Rain had never been the type to grow complacent.
He didn't believe in "main builds" or "only one path."
To him, the more you knew, the more flexible you became.
After all, one obscure spell could be the difference between surviving a curse… or being turned into a frog forever.
Even if most of the spells weren't as "sharp" as his main magic, having them in his back pocket?
It was still an advantage.
"Hmm…"
One day, a certain title caught his eye.
Rain paused, flipping back to the glowing runes etched on the cover.
"Additional Magic…"
His eyes narrowed.
"Wait… isn't this the magic that Erin used?"
The moment the name surfaced, Rain immediately thought of Erin, the dragon queen—whose terrifying enhancement spells turned her swordplay into an overwhelming force.
In her hands, Additional Magic became something far beyond a support spell. It became a weapon.
"…Maybe I can apply it the same way," Rain murmured, sparks of inspiration flashing behind his eyes.
"What if… I could add Haki seeds into someone else's body?"
That way—even those who had never stepped foot into the Pirate World could be granted a 'connection.'
A qualification.
A path.
"…If this works, then even guild members without World Marks can awaken Haki."
The thought thrilled him.
Rain spent the next few days immersing himself in Additional Magic.
He trained, practiced, broke through barriers of theory until the magic flowed into his hands like water.
And when the time was right—
He condensed them.
Three crystalline Haki Seeds, each pulsing with the aura of a different color:
Observation Haki — to see the unseen
Armament Haki — to strike the untouchable
Conqueror's Haki — to dominate the battlefield
Each one burned faintly in his hand, like living flames bound by spellwork.
"…It's ready."
Rain's eyes gleamed.
"Now… it's time to find a test subject."
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