I used NovelAI's unlimited gen membership for $25 a month. Note that "unlimited" is kind of a lie, it's only unlimited if you're under a certain resolution and only if you're not using any of the advanced features. Upscaling and other features cost the on-site currency, which the membership gets you 10000 a month. That should be more than enough for a month, but you can burn through it quickly since NAI gens so quickly.

In the shadowed crags of Gajou fortress, where the jagged peaks of Futago Pass pierced the stormy sky like the fangs of ancient beasts, the final battle raged with a ferocity that shook the earth itself. Snow whipped through the air in blinding flurries, mixing with the metallic tang of blood that already soaked the frozen ground. Gin, the silver brindle Akita Inu, his fur matted with crimson streaks and his three forehead scars burning like fresh wounds, circled the colossal form of Akakabuto. The bear, a behemoth of dark brown fur crowned with a fiery red mane that glowed like embers in the dim light, towered over him—twelve meters of pure, raging muscle, his single remaining eye blazing with unquenchable hatred. The air reeked of wet fur, pine resin, and the acrid stench of fear-sweat from the scattered remnants of the Ōu pack watching from the ledges.

"You've terrorized these mountains long enough, Akakabuto!" Gin snarled, his voice a deep, resonant growl that echoed off the rocks. His greenish-brown eyes, sharp and unyielding, locked onto the bear's scarred face. The training from Takeda Gohee had forged him into a weapon: lean, agile, with muscles coiled like springs beneath his striped coat. But now, in this moment, Gin's body thrummed with something more primal—a surging heat that made his massive sheath twitch, hinting at the monstrous endowment hidden within.
Akakabuto roared, a thunderous bellow that rattled loose stones from the cliffs, his massive jaws gaping to reveal yellowed fangs dripping with saliva. "Insolent pup! I'll crush your bones and feast on your entrails!" The bear lunged, his enormous paws—each claw as long as Gin's foreleg—swiping through the air with enough force to splinter trees. The impact of his steps sent tremors through the ground, the snow erupting in powdery explosions.

Gin dodged with blinding speed, his "Shooting Star" moniker earning its keep as he blurred across the battlefield. He leaped onto a boulder, using it as a launchpad to vault toward the bear's flank. "This ends now!" he barked, twisting mid-air. His body spun like a whirlwind, channeling the ancient wolf heritage in his veins—the Zetsu Tenrō Battōga. His jaws clamped down on Akakabuto's thick neck, teeth sinking through fur and flesh with a wet, tearing sound. Blood sprayed hot and coppery across Gin's muzzle, the taste bitter and invigorating, fueling his rage.

The bear howled in agony, thrashing wildly. One massive arm caught Gin mid-spin, slamming him into the rock face with a crunch that echoed like breaking ice. Pain exploded through Gin's ribs, but he shook it off, his loyalty to his fallen father Riki and the pack burning brighter than the hurt. "For Riki! For Ōu!" Gin surged back, dodging another swipe and countering with a series of rapid bites to Akakabuto's legs, hamstringing the giant. The bear staggered, his red mane matted with gore, his breath coming in ragged, steaming gasps that filled the air with a foul, musky odor.

Akakabuto swung again, but slower now, his brain-damaged fury giving way to exhaustion. Gin seized the opening, leaping onto the bear's back. Claws dug into the thick hide as he climbed, positioning himself for the kill. "You're finished!" Gin howled, his voice triumphant. With a final, spinning slash, he severed the bear's remaining arm at the shoulder in a fountain of arterial spray. Akakabuto collapsed to his knees, the ground quaking under his weight, his roars reduced to guttural whimpers.

The pack howled in victory from the shadows—John's deep bark, Ben's wise yips, Akame's sharp cries—but Gin silenced them with a glare. His chest heaved, adrenaline coursing like fire through his veins, awakening a darker hunger. As Akakabuto lay there, broken and panting, Gin's eyes raked over the bear's massive form. Even in defeat, the tyrant was immense, but Gin's gaze lingered lower, where his own body betrayed him. From his sheath emerged his cock—gigantic, throbbing, a veined monstrosity that dwarfed anything in the wild. It slapped against his belly with a heavy thud, easily two feet long and as thick as a young sapling, pulsing with virile heat. Below it swung his balls, enormous orbs the size of melons, churning with potent seed, their weight pulling at him with every step. They put even Akakabuto's once-formidable maleness to shame, the bear's own shriveled sheath looking pathetic in comparison.

"You... you dare...?" Akakabuto gasped, his voice a weak rumble, blood bubbling from his lips. But there was a flicker in his eye—not just pain, but a twisted submission, the alpha bear reduced to something vulnerable.

Gin circled him slowly, his massive cock bobbing, pre-cum dripping in thick strings that sizzled on the snow. The scent of his arousal mingled with the battlefield's carnage—musky, dominant, overpowering the bear's own earthy smell. "You took everything from me," Gin growled, his voice low and husky. "Now, I'll take everything from you. You'll beg like the bitch you are." He mounted the fallen bear from behind, his front paws gripping Akakabuto's flanks, claws digging into the furred hide until blood welled up anew. The bear's ass, broad and muscular, tensed under him, but Gin didn't care. With a savage thrust, he rammed his giant cock forward, the bulbous head—slick and hot—forcing its way into the tight, unyielding hole.
Akakabuto bellowed in shock and pain, his body arching as the intrusion stretched him impossibly wide. "Aaaargh! You filthy dog—stop!" The bear's voice cracked, the roar turning to a whine as Gin's shaft plunged deeper, inch after brutal inch, the veined length scraping against inner walls with a wet, squelching friction. The sensation was overwhelming: for Gin, the heat and tightness clamped around him like a vice, sending jolts of pleasure up his spine; for Akakabuto, it was agony laced with unwanted sparks, his prostate battered relentlessly.

Gin didn't hold back. He fucked brutal and hardcore, his hips slamming forward with the force of his Battōga strikes. Each thrust echoed with a meaty slap, his giant balls swinging like pendulums to smack against Akakabuto's underbelly, the impact bruising and rhythmic. "Feel that, you monster?" Gin snarled, his breath hot against the bear's ear. "My cock's bigger than your pride ever was. You're mine now—take it!" He bit down on Akakabuto's scruff, teeth piercing skin, the coppery taste flooding his mouth as he pounded harder, the rhythm building to a frenzy. The air filled with the obscene sounds: the slick slide of flesh, Gin's grunts, Akakabuto's increasingly broken moans.

The bear's resistance crumbled. His massive body trembled, the pain morphing into a twisted ecstasy as Gin's enormous cock hammered his depths, stretching him to the brink. "N-no... ahh... it's too much!" Akakabuto whimpered, his voice high and pathetic, like a cub's. Drool spilled from his jaws, mixing with blood on the snow, and his own cock—once mighty but now overshadowed—hardened against his will, leaking pre-cum in pitiful dribbles. The scent shifted: from blood and fear to the thick, heady musk of submission, Akakabuto's body betraying him as waves of unwanted pleasure crashed through.

Gin laughed, a dark, triumphant bark. "Cum for me, bitch! Show me how weak you really are!" He accelerated, his thrusts turning savage—pulling out almost fully, the cool air teasing his slick shaft, then slamming back in with a force that made Akakabuto's belly bulge from the intrusion. The bear's insides burned, every nerve alight, the abuse pushing him over the edge. With a humiliated roar that dissolved into a whine, Akakabuto came like a bitch, his body convulsing as ropes of cum sprayed from his cock, splattering the ground in hot, sticky bursts. His ass clenched around Gin's girth, milking it involuntarily, the spasms drawing guttural moans from both.

But Gin wasn't done. His own climax built like a storm, his giant balls tightening, churning with gallons of thick, virile seed. "Here it comes!" he howled, the sound piercing the night—a long, echoing cry that summoned echoes from the distant pack. He thrust one final time, burying himself to the hilt, and erupted. Cum pumped in endless torrents, hot and viscous, flooding Akakabuto's ass with such volume that it bloated the bear's belly outward, rounding it like a overfilled waterskin. The pressure built, excess seed gushing back out around Gin's cock in creamy rivulets, but still more came—gallons upon gallons, forcing its way deeper until it erupted from Akakabuto's mouth and nose in choking spurts. The bear gagged, eyes watering, the salty, musky taste overwhelming him as cum dripped from his nostrils, pooling beneath him.

Gin rode out the orgasm, his body shuddering, howls fading into satisfied pants. He pulled out slowly, his cock glistening with fluids, a final spurt landing on Akakabuto's back. The bear collapsed fully, belly sloshing, broken and claimed. "Remember this," Gin whispered, voice hoarse. "The silver star that ended you."

In the aftermath, as the snow settled and the pack approached, the wilderness held its breath— a tale of conquest etched in blood and seed.