Wtf? It's shi*y OC story.. OC being some random british dude..

Not a bad first chapter but there were many, many, many many, many, many glaring grammar errors that really took away from the enjoyment.

"In a room sat 18 years old Naruto Uzumaki-Namikaze, an A-ranked undercover agent ranked that goes under the alias 'Mayonaka no Shadow(Midnight Shadow)' . "

First of all, please pick a tense; doesn't matter if it is past, present, or future, just pick one and stick with it. Bouncing between different tenses doesn't end very well for the writer or the reader, not to mention it is a big grammar error.

Next, use hyphens when detailing age. As an example: 18-year-old.
Watch your spelling as well, there is no "s" needed on "year" in your sentence.

Also, and this is a big grammar rule, if the number is less than 10, it is expressed in written form. For example, "2 superiors" would be expressed correctly as "two superiors."

Another big grammar rule is never start a sentence expressing numerics, always use written forms. So, 1st, 2nd, 3rd, and so on is a big no-no. They should always be expressed as "First, second, third" et cetera. Actually, outside of a list format, 1st, 2nd, 3rd should not be used.

Word redundancy and repetativeness. "Ranked" is brought up twice when once is more than enough. Same with "under," the second use can be replaced with "by" and the sentence not only becomes more aesthetic, but a bit closer to being grammatically correct.

Never partially translate a phrase, term, or word. "Kage" means shadow in Japanese.

Seperate character speech and never have two or more character dialogues in the same paragraph.

Never include parenthetical author notes in the body of your story. Save them for before or after in heading or footer notes.

Homophones; be very careful with them. Common confusion with homophones includes: they're, their, and there.

Instead of: "These news can also answer your..." try "This news can also answer your..."

"Also, these are the info on the replacements as requested by Tsunade-sama." said a pale raven-haired"

Again, simple word confusion: "this is the information on the replacements..."
Careful of your punctuation as well. After Tsunade-sama, a comma is needed, not a period.

"I stared at the covered dockets for what felt like eternity."So, are you gonna read it or do you want me to brief it for you?"Asked Tsunade"

Make sure you are using spaces after ending sentences. As you can see, many times, you just keep right on typing instead of using correct breaks.
Also, it seems you were looking for the word documents, not dockets.

Alright, to be fair, it seems that you actually broke ever English grammar rule created in your first chapter alone. The best advice I can give you is to stop writing just for a little while and pay more attention to what your teachers say in class. Ask them for help. Let an educator look over what you are trying to type and offer corrections before you post.

Either that or find yourself a really patient beta reader.

There is potential here but that potential needs a whole lot of polish.

Very nice, I hope you would post the next chapter soon -

Super! But can u update earlier)

ohmygosh chickboy ahh!

I think this is a great story. Hope you will comtiune this story

Please update!

awsome

continue

i didnt get this part "Long story, short: Sasuke Uchiha is the gay bastard who put me in here after being in a relationship with me for only 1 week to make Naruto Namikaze the duckhead's boyfriend. Just stupid." . i'm assuming that Sasuke did that to make Naruto jealous. but idk.

characters are a little ooc. but not overly much. i thought it was a little short but it's ok for a first chapter.

hope you continue with this story. good luck!