I made some fixes to chapter 2 and added a scene referenced in here.
Anyway, I hope you like it :)
"Make every last ounce count..." asked Itachi with her large breasts near Naruto's imprisoned erection as both blushed but neither would say no.
"What am I thinking?" She thought to herself.
"But I didn't like seeing him sad because of me... and it's just us doing "this" nothing more" tried Itachi to explain the sudden increase in her heart rate.
"I promised... anyone who takes my bra can do anything... to my breasts" blushed Itachi.
"He already started" she thought to herself as she saw Naruto's precum making it's mark on his pants.
Naruto unzipped his pants releasing his member fully erect. However, because it was so large, the moment he gave it an opening, it quickly escaped showing it's full glory. The speed it rose up in made some of Naruto's precum splatter on Itachi's face.
"This much already.. from just precuming?!" She thought to herself amazed at it's length and quantity of what it will produce for her.
Naruto then took a huge gulp as Itachi was waiting for him to do his "thing" to her.
She suddenly felt his lips on hers.
"What are you..." asked Itachi not getting this sudden gesture.
"Don't take this the wrong way! I know your doing this as a promise but... it's my first time and not kissing even once before doing this makes it awkward" he explained as if the situation they were in wasn't awkward at all and a kiss would make everything right somehow.
"Su... sure" stuttered Itachi not knowing how to respond.
Naruto continued on saying "You said... I can do whatever I want, right?"
"Yes, and I... won't do anything..." She blushed even more.
Naruto's cock was still pre-cumming but now even more and in a much steadier stream of a colorless liquid dripping over his cock to Itachi's large breasts even if neither hasn't touched it yet.
"If I can do whatever I want, then I wont waste this for nothing!" thought Naruto to himself as he formulated a plan of what he will do to her.
He lowered his right hand to her right breast and grabbed it from her nipples with two fingers seeing it stretch. He then did the same with his left hand her left breast.
Naruto then pulled them towards him affectively pulling Itachi whole body towards him until her breasts were wrapped around his cock.
He released his grasp around Itachi erect, yet soft nipples and grasped her breasts from both sides instead squeezing them around his member.
Naruto's shaft was very big and long. She thought that it was worthy of her own rather than usually big two bodily features.
"I didn't expect it to be this big and... even reach my mouth!" thought Itachi to herself thinking she can avoid it's contact orally as it only rubbed against her cheeks. However, Naruto's pre-cum made her face wet with it as it ran down close to her mouth as she could almost taste it.
As Naruto held her breasts firmly around his cock, he began to thrust in them. It was a smooth thrusting and both could hear the sound of it because of Naruto's pre-cum acting as lube. Since Itachi didn't move and Naruto did all the work, she felt every thrust as his wet tip hit her face making several sticky strings appear every time he distanced his cock away from her cheeks.
"This feels so good... your breasts are so soft... and your face" said Naruto trying to prolong his orgasm.
"What the!?" Itachi was surprised.
Naruto wrapped his legs around Itachi's back making her breasts squeeze even harder around his shaft.
"I know this wasn't part of the deal but..." said Naruto.
"huh!" was Itachi only reaction before Naruto made the last thrust not on her cheeks but in her mouth as he took her by surprise.
He quickly released his grip from her breasts and soon applied them to her head as he pushed it down on his cock.
"Sorry, Itachi-Chan!"
In that last thrust, he finally released a rather big load in her mouth down her throat. His ejaculation went down her throat as Itachi felt a warm drink in her stomach.
She then pulled her head away to take a deep breath as Naruto was still cumming making Itachi feel it in her throat and mouth as well. He ejaculated 3 loads. The first was in her stomach through her throat. The second was on her face and the last was on her breasts. Each one filled at least a small cup.
"I AM SORRY! I JUST HAD TO!" said Naruto knowing she would get mad at him.
"That really... was you last night..." said Itachi while coughing a bit but she wasn't mad since she expected that it might end like this.
"What?" Naruto asked as Itachi recalled when she licked Naruto's ejaculation on her floor last night to know what it was because it was too dark to see and too windy to smell.
"Huh?" Itachi felt herself wet from what happened.
"Is something wrong?!" asked Naruto worried that he hurt her.
"No... Nothing!" stuttered Itachi not wanting to tell him how she felt.
Itachi then stood up as her face and breasts were drenched in Naruto's cum while it made some strings extend from her nipples, and mouth to Naruto's cock. Even though he was sitting and she was standing, his cum was thick enough to make such a long string connecting both of them.
He too stood up and got a better look of her as his ejaculation covered her face, mouth, and breasts dripping between the later onto belly down to her pants covering up the fact that she got wet from this experience.
"If I got wet from him and he from me then..." thought Itachi as Naruto's erection was still on and she wanted to be satisfied.
"Let's do this again sometime..." said Itachi.
"Bu... But you said it was... only once?" asked a surprised but secretly happy Naruto.
"Yeah but... I think... it's a secret that we both enjoyed..."
"both" blushed Naruto thinking to himself.
"But only this... nothing more" said Itachi with Naruto agreeing even though both wanted more. However, if it was only lust that bound them then they should restrict themselves before making an even bigger mistake.
She then took a quick bath at Naruto's house and borrowed a pair of pants he had laying around since hers were dirty and it would take too long to clean the ones she had.
She put on her bra and shirt and went back home so both can get a good night sleep...
Itachi arrived at her house wanting to satisfy the wetness she felt using a clone of Shisui. Meanwhile, Naruto also thought of the same thing but with Sakura as he wanted to do much more and could have done but didn't.
They summoned their clones and looked at them for a few seconds but didn't feel the same thing they felt with each other that night even if Naruto only did it once and this was his second time unlike Itachi.
They both disabled their clones seeing there was no use for them anymore.
This time, they wanted the real thing, they wanted each other...
End of Chapter 3.
Well, I hope you liked this chapter. I am not sure how I will progress the story from now on but I liked what I did here.
I added a segment to last chapter where Itachi does like Naruto's cum the earlier night and it is much better described there. All I did here was shorten it.
Btw, I again ask if you know someone who does commissions, I would be more than happy to make some of this fanfic into a comic :)
Lastely, if you have no clue how female Itachi looks like, then search for doujins and fanart by arcon on google (itachi arcon genderbender).