Ash_Kettchup

After he died, Naruto believed he was going to the afterlife. But opening his eyes, he finds himself stranded on an island with no powers except a window and a strange fruit in his hand.
He's also younger. A lot younger than when he died.
All the women of his past life are on that island as well? And they're weak?
........................
"Is this the afterlife?" Looking at something called levels on the interactive, translucent surface, Naruto wondered. The island was different from the motley, spiritual expanse where he met his parents.
"But what are all those beasts on the land and the sea?"
When he frowned, weirded out, he saw a beautiful auntie passed out on a beach. The next day he saw another, more familiar figure there.
........................
Happy in love, Naruto was still bewildered. 
Unbeknownst to him, something which he would only find out later, they were transported to a world of pirates, bounty hunters, and sea guardians.
Weeks later. Looking at the sullen, dark-haired, large chested woman with a mole on her face, and who wore a mantle with a seagull adorned on it, he chewed over, "Marine? Vice admiral? Pirates?... I'm not sure what this big chested woman's talking about, but she's making my choice easy with this cleavage."

Naruhodo: The Rasengan Admiral, Stranded in One Piece (R18)

The private world depended on Naruto and followed him. Mikoto therefore saw everything he and Kushina did outside.


Naruto had already shown her how to use the crystalline vision, the outside world imagery.


When Kushina and her son returned, Mikoto was neither worried nor astounded, witnessing the blood on them.


The pile of beasts and meat stored as the day progressed by Naruto around the Pokecenter already prepared her for a graphic return.


The two hunters, mother and son, came back with a look-- one as carefree as a few hours earlier, but they also came back with a different optic feel.


Like two knives that went to get forged, they came back looking stronger, keener and sharper.


Mikoto did not miss their new details when she greeted them at the gates of their private shelter.


She was standing in front of the red roofed, white building, curious, when she showed Kushina the new clothes she had just finished for her. She offered her to shower before she tries them on.


Time passed. The two adults and the teenager talked for a while. During the talk, Naruto informed his stranded partners of certain things, and proposed a training plan for the next day.


When they finished, they all went inside and started to wash up for some, and prepare dinner for others.


Mikoto was in the kitchen, skinning a wolf and preparing something for the night meal when in the great hall, Kushina approached her son and said, in a disinterested, casual tone, "You're grown and all, but a bath with mom for missed time... Should we go for it?"


"A bath? You and me, you mean?" Seeming surprised, Naruto's eyebrows rose, and his eyes widened when he asked.


"Who else? Don't want to?" Kushina rolled one eye, staring at her son.


... To say more... She was facing a sexual trial and a clean-living, moral difficulty


As weird as it sounded, she was excited by and attracted to Naruto all day long.


Kushina didn't know why, but all she could do, all she better do before it was late, was to check something.


If the immoral...the shocking desires were caused by the sun, the heat, the mosquitoes of the jungle... Or if she was simply mentally ill...


Itchy Kushina