It's been 15 years since the 4th great ninja war ended and since then the world have been at peace. But that doesn't mean that they can relax there is always a reason to be ready. So in today world there isn't much need for ninja but that doesn't stop people wanting to be one. We cut to one team who is in a bad situation. They are all on the ground bout to be struck down.
???:damm it can't believe I'm going to die before I become the hokage.
??:I'm sorry for putting you guys in this mess.
??:konohamuro sensei this what we signed up for.
??:enough with these time super explosive Phoenix.
As it about to explode and random guy in a cloak jumps In front of them.
??:yeah not on I'm watch.
These guy stops the Phoenix for exploding as it seems it is stop in mid air he sends it back exploding it right back in his face. He turns around and removes his hood.
??:konohamuro are you guys okay.
Konohamuro:does it look like we okay we almost died
Yn:you guys are luck I cane in time.
Konohamuro:yes we are but how did you find us exactly.
Yn:you know why.
Konohamuro:oh yeah.
As the rest get up.
??:konohamuro who is this
Konohamuro:boruto,sarada,mitsuki this is Yn he was one of the best students.
Boruto:why dose he look like Kakashi.
Yn:well that simple I'm his son.
Boruto:he your dad.
Yn:yep know all of you grab my shoulder.
Boruto:just do it
As they put there hand on his shoulder they disappear right in the hokage office scaring him.
Naruto:what the hell Yn what did I tell you about doing that.
Yn:not to any way mission completed if you excuse me bye.
Sarada:is it just me or was he looking at me to often.
Boruto:i notices that to.
Mitsuki:zig dose seems wired.
Sarada pov
After we leave I go home to talk to mom.Sarada:mom I'm home
Sakura:good who was your day
Sarada:good almost died but this guy Yn safes us.
Sakura:thank god he was there like always.
Sarada:what do you mean like always.
Sakura:well because when you were born your dad wasn't he so he asked Yn to watch over you that why when you are in trouble he is always there