Wind roared in Sakura's and Shion's ears as they tumbled through the air. Darkness clouded Sakura's vision as tendrils of black and purple miasma surged up from the magma below, rising in the form of great serpents to meet her.
"Hold on tight!" Sakura yelled to Shion, who already had her arms wrapped tightly around her body. "Wind Style: Gale Palms!"
Omitting all hand signs, Sakura drew wind chakra directly from her Breast Seal and clapped her hands together. As she slowly pulled them apart, faint wisps of greenish energy curled from the growing gap between her palms— but just as the Mōryō's true form opened its hundreds of snakelike maws to devour them, she snapped her hands forwards, pushing at the air itself.
Newton's Third Law states that for every action, there is an equal and opposite reaction.
The air in front of Sakura rippled, hurling her backwards.
Hugging Shion tightly against her chest, Sakura's back slammed into a stalagmite jutting from the sea of magma, the impact causing her cough up blood. She slipped nearly metre before just barely managing to summon enough chakra along her back to halt her descent, just shy of the molten rock below.
A soundless scream escaped Sakura's lips.
The red-hot stalagmite seared straight through the fabric of her clothes, and the skin on her back began blistering and bubbling under the intense heat. The sheer agony exploding across her back was all that kept her conscious long enough to scramble to a higher foothold, her singed clothes streaming behind her as Shion sobbed in her arms.
Everywhere the eye could see, there was lava— they had fallen from quite a height. Far above Sakura's head was the cavern floor, the same one she had stood on just moments ago, where the sealing formation was inscribed. It was far too high to reach, well beyond her ability to jump. There was nowhere else to go, and nowhere left to leap.
Sakura looked up grimly. It was either lava, or the demon's maw.
"Yes, that's a nice look, kunoichi," the Mōryō taunted her, speaking through its myriad snake mouths. "Look upon my true form, and despair...."
The Mōryō's body was like a gigantic ball of writhing snakes. It was a mass of tendrils of dark, miasmic chakra sprouting out of the lava, looming over a comparatively minuscule Sakura and Shion. Their only way out was through Reverse-Summoning— but Sakura doubted the demon would allow her to finish. One sweep of its tail was all it would take to send them plunging into the sea of molten rock below.
"Catch!" Sakura suddenly shouted.
Chakra coursed through her muscles as she activated her Chakra Enhanced Strength, and she tossed Shion into the air. Unwilling to let the shrine maiden perish in flames, as he needed her power to become a completed being, the Mōryō lunged after her, one of his serpentine shadow-heads stretching skywards in an attempt to swallow her whole.
Sakura leapt onto the Mōryō's body as he surged past, crushing the tiny stalagmite beneath his massive weight. She unsheathed the Manyuu blade and sliced clean through one of the creature's countless necks, then sprang to another and did the same.
"Pesky kunoichi!" hissed the Mōryō.
Sakura jumped and twirled in midair, her blade sweeping in a swift half-moon arc as it sliced through the lunging snakes— but now, she was surrounded by endless streams of roiling miasma. She swung and swung and swung, until her arms felt like they were made of lead. Her Sharingan spun madly as she dodged, pirouetted, and ducked to evade the slicing shadows. Wounds bloomed across her body one after another, dyeing her clothes in crimson, until—
Blood spurted out of Sakura's mouth.
Feeling rather faint,
she looked down,
and saw,
there,
was
a
gaping
hole
in
her
chest.
"Heh," Sakura muttered, blood dripping from the corners of her mouth. "I have boobs."
Her grip faltered, and the Manyuu blade slipped from her fingers, spinning as it dropped into the magma with a soft plop. Then, she pitched forwards and vanished into the darkness of the Mōryō's body.
"No!" screamed Shion as gravity reasserted its hold on her. "You can't be dead! You promised me!"
Despair gripped Shion's body as darkness closed in around her. She clutched the bell pinned to her lapel, whispering a prayer for her mother's forgiveness— and suddenly, it gave off a sharp, crystal-clear peal.
"Mum?" Shion whispered. "You were with me, all this time…?"
Her mother had never truly left her.
As Miroku was originally from the Spiritual Plane, the death of her mortal flesh meant she had never truly gone away. Just as she had trapped the Mōryō's soul in the mausoleum in the Land of Demons, so had she sealed her own soul and powers into her precious bell— the very artefact that had given birth to both her and the demon; the very item the mysterious great existence had left behind when he had discarded his mortal form, before ascending to the next level of existence.
For as long as the Mōryō was alive, so would Miroku endure.
"Honoured Sage Mode of the Spiritual Plane!"
Pink light flooded around Shion, banishing the encroaching darkness. Her hair lengthened and fanned out behind her like an angel's wings, while glowing patterns spider-webbed across her skin. An aureole formed above her head, shining radiantly.
If she was like this, she ruefully thought to herself… then surely, she now had the power to self-annihilate… and bring the Mōryō down with her, once and for all.
"Breast Diet: Release!"
There was an ear-splitting bang as, not far from Shion, one of the Mōryō's serpentine heads was literally blown apart by a shockwave of pressurised chakra.
"Told you it would take more than a hole in my chest to keep me down," said Sakura, wiping the blood from her lips. "Ninja Art: Mitotic Regeneration."
Unfortunately, Sakura had never managed to find the opportunity to fully refill her Yin Seal to perform Tsunade's undying combo. As a result, she was forced to activate the Breast Diet Kinjutsu, sacrificing the very source of her powers in exchange for unlimited chakra to fuel her teacher's Creation Rebirth technique.
Her bones rapidly regrew, closing the gap in her spine and forcing her to snap upright. Layer by layer, her heart and damaged lungs reformed, and finally, her flesh knotted itself back together before Shion's very eyes. Before long, nothing remained visible of her insides, as her skin sealed up completely.
"Impossible!" roared the Mōryō.
"WIND STYLE!" Sakura shouted. "CHAKRA ENHANCED STRENGTH!"
Sakura's breasts were dwindling rapidly.
From oversized O-cups, they shrank to N-cups, then mere M-cups…
With each of Sakura's punches, one of the Mōryō's heads was obliterated. The blowback from her still imperfect technique shattered her own bones to fragments each time she struck, but she almost instantly regenerated the damage and kept punching madly at the dark, twisting shapes surrounding her, vaporising them one by one through sheer air pressure.
Sakura's beautiful breasts were now J-cups. Immense I-cups, H-cup honkers, giant G-cups.
Her bosom no longer large enough to sustain the amount of elemental chakra sealed within her two Breast Seals, Sakura's fists erupted with lightning chakra and wind chakra on their own. Something finally clicked within her, and she performed fire nature transformation on the limitless chakra flowing out of her deflating breasts.
D-cups.
"So this is how you do it," murmured Sakura feverishly. "Fusing chakra natures…"
C-cups.
"NO!" screamed the Mōryō.
If Earth, Wind and Fire made Dust Style…
B-cups.
Then Lightning, Wind and Fire made…
A-cups.
All of the accumulated chakra condensed into one point at the tip of Sakura's finger.
"Bang," Sakura whispered. "Plasma Style: Lorentz Gun Jutsu."
The ball of plasma was instantly accelerated to eight times the speed of sound by the surging electromagnetic fields surrounding Sakura, piercing the very core of the Mōryō's being. And once it found its target, it exploded— and the demon was reduced to ashes, consumed in a blinding flash of light that burnt hotter than a thousand exploding suns.
AA-cups.
Sakura's tent-like brassiere hung limply about her shoulders. Her formerly mountainous chest had dwindled to little more than a pair of nipples.
"I've got you," said Shion softly, flying over and catching an unconscious Sakura in a princess carry before she could fall. "…my hero."