Male ninja reader x harem

The Assassin has come

You have living in a old crappy house all by yourself. Why you ask well your a son of a hooker who stole dna from the 7th Hokage Naruto Uzumaki because she wanted to live in luxury.
But as she birth to you she die Naruto took you in only until you were five where him and his wife Hinata kick you out (literally) then people have been hunting you calling you bastard no one wants to be your half brother Burto and half sister Himawari would always hunt you down for fun and would always hurt you you have no friends except Mitsuki.

You live in a abandon house trying to get some sleep. Just as you fallen asleep there was a ninja who sneak in and raise his weapon until he saw you.

???: Wait my target is a child? And why is he wearing a mask?

Your wearing a mask to see if people would stop hurting you.

The then place an orb on your head and saw your past your pain and suffering.

???: So my client lied to me. Yeah kid wake up.

(Y/n): Wha? (You then saw then man) What please don't hurt me!

???: Don't worry I'm not going to hurt you. Do you know a Naruto Uzumaki.

You nodded yes

???: Well shit he ordered me to kill you.

You began to cry your father hire someone to kill you.

???: But I'm not. The names Hanzo

(Y/n): My name is (y/n)

Hanzo: I can help you train you in the art of assassin.

(Y/n): You can!

Hanzo: Yes but first you have to tell me why are you wearing a mask?

(Y/n): If wear a mask no one will hurt me.

Hanzo: Alright then.

Hanzo then made a portal and you two went in it.

When you two came out of the portal you notice that you were out front of a huge building.

(Y/n): Is this where you going to train me?

Hanzo: Um no...I'm just here to pick up some things.

When you two enter your eyes widen the place that you two enter was a bother where man and woman would get pleasure from other man and woman you then turn to Hanzo.

Hanzo: I know what your thinking but I'm we are here to get the children.

(Y/n): Children?

Hanzo: Yes children. Me and the rest of the group pick up children here that born from woman who don't/shouldn't have kids so we take them and we bring them to base if someone wants to adopt them if not then I bring them to the orphanage.

Worker: Welcome back Hanzo, are you here for children.

Hanzo: Yes how many?

Worker: Three this time two full breed and one mix I be right back.

The Worker walk away.

(Y/n): What did she mean by breed?

Hanzo: To answer your question we are in a different world and there are different species here.

Worker came holding a basket with three kids in it. One had red skin, another one was half snake, and the last one had green skin and pointed ears.

Hanzo: Thank you.

You two then leave the building.

(Y/n): Ok I want answers! Where are we? What are those children? And is this group you are part of?