Not quite (Bad End)

Tentacles rose up from the ground, binding Naruko's limbs and squeezing the neck. Gozan's clothing was disintegrated in the blast, but that made things convenient. As the tentacle around Naruko's neck loosened, a black collar formed from a strip of its "flesh", like the peel of a banana. The whole layer shed like a snake, revealing a throbbing, slimy, very phallic tentacle. Gozan could not be harder.

"First order: You're a female named Naruko now, pronouns, lack of rights, everything. Acknowledge it."

"I'm Naruko Uzumaki. Please don't do this to me!"

"Yes, talk back all you want. Struggle with your mind and body. That why your collar is black. When you're broken, you'll truly become a whore."

He used tentacle slime to lube up his cock and without any warning or concern, he deflowered Naruko's pussy in one thrust, balls deep. He, or rather she now, never had a hymen, but it wasn't any less painful as that massive cock pounded away at a hole that was supposed to be for show only. She sobbed and screamed, but was ignored. Struggled, but couldn't move.

"Please have mercy! This is agony having my gut stretched like this! Fucking fuck! Fuck!"

"You crafted this form perfectly, right down to the womb. I guess you applied the knowledge you gained fucking whores towards this. I wonder if you can get pregnant? Either way, you'll be filled with enough cum to make it feel that way."

The tentacle, left unnoticed by Naruko considering the distraction of a brutal ****, entered her ass just as roughly and kept going deeper, turning her ass into a hole for sexual pleasure.

"When that's done with you, you'll cum just from taking a shit. Your throat will be modified in a similar manner on our trip to your village. You like the sound of that? Who cares, whore. Hahaha!"

It was actually a relief when after hours of double penetration in multiple uncomfortable positions, her pussy and ass were filled with cum, inflating her stomach obscenely. However she wasn't allowed to rest as her body moved on its own to give him head like his cock was delicious and facefuck herself on his cock like she had a clit in the back of her throat.

Like Shizuka before her, Naruko was **** by every cock in the village, including Ino's and Sakura's, who got Ino to teach her right before this. The sight was the final straw that broke Shizuka's mind, making her collar redundant. At Hinata's insistence, Naruko was taught as well so she could still carry Uzumaki children one day.

Not long after that, the obscene march of the Erokage's army claimed all the civilians they came across. They were used as sextoys and human shields as the Leaf Village kunoichi shared the same fate. While Chizuru and Ino double-teamed Shizune against her will on the Hokage's desk, Tsunade was **** on the balcony for all to see while Naruko masterbated uncontrollably both ways, getting cum and pussy juice on Tsunade's face. She moaned like a true whore, demoralizing the remaining resistance. By the next generation, the whole ninja world became like this, with said generation raised to accept this, collar or no.