We start off with 8 year old Yn

Yn is Anbu strength

He entered the Anbu. Hiruzen's. Not danzo's for obvious reason

Yn had his his Anbu clothes in and walked to kakashi's house

He knocked

Kakashi opened the door

Kakashi: Hello?

Yn takes off the mask

Yn: I'm an Anbu! Just like you nii-San

Kakashi pats his head.

Kakashi: nice job Yn. Your gonna become a really strong ninja just like Minato-Sensei.

Yn: Wait, I'll be right back. I think the villagers are doing something to naruto

Kakashi: Alright. Good luck.

With naruto

Naruto walks to a mask shop (you already know what's about it happen)

Naruto: Hey can I get a mas-

Guy: no, demon!

He throws a mask at Naruto

The mask splits in half and and Anbu appears in front of Naruto and the mask falls to the floor.

Yn grabs Naruto and vanishes

Naruto: who are you?

Yn takes off the mask

Naruto: Yn?!