Naruto felt Koyuki jerk under him as he had been fucking her. His own orgasm had boiled over as she came loudly. He was glad that he had placed a silencing seal much earlier while she had been jerking him off. He felt his warm cum fill around his cock and knew she was absolutely full of his cum. He slowly slid out of her and panted a bit, sitting up on his knees and watching as Koyuki based in the afterglow for a moment
"Wow…" Koyuki said, panting as she lay on the bed, unable to feel her legs at the moment. She looked up at the blonde who had just fucked her into a sense of orgasmic oblivion. "You know… I'm going to need more of that when I have the time." She said.
Naruto chuckled a little bit and nodded. "Not a problem." He said as he slid off the bed a moment and searched for his gear. He grabbed the pouch of ninja gear he had and pulled from it a Hiraishin Kunai. Naruto then went over to Koyuki and held it out by the blade. "Take this, when you need me, throw it to call me. I'll be able to come within ten feet of the blade." He told her and watched as Koyuki accepted the knife and tucked it into a spot within her kimono.
"Impractical, but I suppose it will work." Koyuki said as she stood up to get dressed. Her legs felt like jelly, but she couldn't deny that she loved every moment of the hard pounding she got from the blonde.
Naruto shrugged a bit. "I haven't gotten around to creating something more effective." He supposed he should so he would have a bit more forewarning before someone like Koyuki summoned him. He doubted she would be the last person Naruto had to give a Hiraishin Kunai to.
Koyuki made sure she looked like a prim and proper daimyo before she moved to the door. "I want you to get some rest Naruto-kun." She told him, looking over her shoulder at him. "Even though you heal fast, I want you to rest."
Naruto offered a slight salute and got back in the bed, making a show of settling back into his spot.
Koyuki rolled her eyes, but she supposed that's what she got. She then walked out of the room, letting the blonde rest.
Naruto waited until Koyuki had left before he grabbed his pouch again and from it pulled his book. He sat back down and flipped it open to the level up page. He paused as he saw something new.
'Updates Available. Upload?' It had two simple answers: Yes and No. Figuring what the hell, Naruto selected Yes.
From seemingly nowhere a blue book appeared and slammed into the book Naruto was holding. Both fused together into one, and soon Naruto was holding one slightly heavier book that was closed. He flipped open the first page, wondering if whoever made the book had some words for him
'Congratulations Naruto! You have successfully merged the new content with the old content without any problems! This is a little something I've been working on, adding additional stuff to the original game system. No doubt you notice the new cover?' Naruto looked at the cover which had one black bat like wing and another white feathered wing on it. He went back to the book. 'Those have to deal with two additional perks that are added that are somewhat special. More Stats including Demonic Chakra, Reflexes, and even something I decided to throw in: Divine Chakra. There are more skills too, but you have plenty of those already.
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'Another thing, I have standardized the amount of experience you get for having sex with each woman instead of having it decrease the more times you have sex with the woman. As you get higher in the levels, you've no doubt noticed you level up a lot less. Despite this, there are a few civilian women who you will be having sex with that you can't afford to keep having the amount of experience drop.'
Naruto was thankful for that and soon began to look through the book. It felt heavier, more potent. He noticed he still had everything right where it was at. His stats had an additional five: Demonic Chakra Levels which was already at a whopping thirty-five points right off the bat, Demonic Chakra Control which was at an absolutely shitty five, Divine Chakra Levels were at ten, and control for it was at ten as well. He supposed that having a Bijuu in his gut since he was born would give credence to the levels of Demonic Chakra. His last new stat was Reflexes. He knew reflexes were good to have, and his reflexes weren't that bad. He had reflexes at about twenty-five already.
He then flipped through the book towards the Perks. There he saw a few and debated a second. He tapped one he already had: The Rinnegan. He was surprised when a visual representation appeared over the book like some sort of Genjutsu that let him see it. It showed him using each of the Rinnegan abilities: taking the soul of someone, Shinra Tensei and Banshô Ten'in, etc. It was kind of cool; he could now see what he was taking.
Naruto scrolled through the perks, noticing a few that interested him a bit. Finally he found something that looked new: one of the Requirements was Demonic Chakra. "Demon form?" he asked and furrowed his brows a little bit. That… didn't sound good. He tapped on it and from the book it first showed the requirements.