[Third Person-POV]

Trunks:It can not be, how can he be here?!

Black:After taking care of your boyfriend I can finally destroy you, once you do not meddle my plan will finally be completed,The Zero Mortasl plans will be completed!!!

Trunks looked at the floor while tears fell from her cheeks, in that she realized that Goku transformed into Super Saiyan and stood in front of Black

Goku:So you're the person who murdered my son!!

Black:That's right and let me tell you that he was a good training doll AGH!

Black stopped when he felt the fist of goku in his stomach

Goku:Do not you dare talk about my son like that!!!

Goku punched Black in the face again, knocking him back

Black:Okay, this may be harder than I thought HHHHAAAAAAAAAAA!!!!

Black became Super Saiyan, Goku did not flinch, he just threw himself at Black and kneed him in the face but Black counterattacked with a punch in the face of Goku

Vegeta:So that's Black, he does not seem to be very strong

Trunks:Do not confess,Father,he is more powerful, it seems that he is thinking something

The fight between Goku and Black was still going on despite everything Goku and Black was on par until Goku felt how Black's power increased much more than before

Black:Prefect, this pain will make me much stronger, with your help and that of your dead son, they helped me to be that strong

Goku:Stop talking about my son that way!!!!

(Y/N) Present:It's the first time I see my Dad that way

Goten:I agree

Goku was thrown at Black but he teleported behind him and caught Goku and put a ki blade near his neck

Black:I think that was a good warm-up, I think I will not need you anymore, it's time to destroy everything you love

Goku:Ugh! let me go!!

Goku nudged Black but he did not flinch

Black:Do not worry, Goku, you will be in the same place as your son

Suddenly the same portal from before opened next to Black

???:MOTHERFUCKEEEEER!!!!

Black:What theUAGH!!!

Black:UUUUAAAGGGHHH!!!!

Everyone saw how Black was thrown against some rocks, everyone turned to see that the cause of all that was (Y/N)

(Y/N):You have to do better than that to kill me Black!

Black:Why?!? Why do you always have to hit me on the fucking face?!?!?!

Everyone was surprised to see (Y/N)'s appearance except Trunks,she was very happy to see that he was still alive

(Y/N) Present:W-Wow, is that me from the future?!

Bulma:I must say, the years have been very good for (Y/N)

(Y/N) watched as Black left the pile of rocks

Black:Damn it, I assure you that this time I will kill you!!

(Y/N):I'm sorry but I think your bus is about to leave

Black:Uh? AAAAAAHHHHHH!!!

Black quickly was swallowed by the portal taking it back to the original timeline

(Y/N):Well, at least he could not do anything to this place

Goku:(Y/N)!

Goku approached (Y/N)

Goku:(Y/N) are you alive!!

(Y/N):That's right, why do you think I died?

Goku:Well, Trunks said you were dead

(Y/N):Do not worry, I've fought against Black many times, he's nothing against me

Goku:You have become stronger 

(Y/N):I need to be to protect the people of the future,I would never leave my training

Goku:That's something I had not heard before, I'm happy to see you again, let's go with the others, they should be as impressed as I am

Goku and (Y/N) went to where the others were,once (Y/N) landed on the place,Trunks ran towards him and hugged him very hard

Trunks:I was very worried about you!...I thought...I thought you were...

(Y/N) took Trunks' chin to face her

(Y/N):Trunks, you know that I will never let someone hurt you and I will not let someone kill me either, I will fight to the end with just the goal of protecting you, so do not worry about me

Trunks nodded,(Y/N) clean the tears that fell from Trunks' cheeks causing her to blush a little,the (Y/N) of the present and the Trunks of the present blushed at this

(Y/N):That's better, I do not want to see you this way

Trunks:T-Thanks (Y/N)

(Y/N):HeHe....Well,it's good to see you all again

Goku:From what I can see, the future will change you a lot, if before you saw badass you are now at a new level

(Y/N):Hehe thanks uh?

(Y/N) realized his self from the past

(Y/N):Oh you are my self from the past, it's a pleasure to meet you

(Y/N) Present:It is also a pleasure to meet you...me from the future

(Y/N):Wow.....I did not remember that I was very small...eh?

(Y/N) noticed that someone else was watching him,he looked around and saw Trunks of the present staring at him with a blush on her face

Goku:So, did you come to the past to avoid another problem?

(Y/N):Eh? Oh, no, I came to the past because we need your help, I think you could see that Black is very powerful

Goku:Yeah, Trunks told us everything that happened in your timeline

(Y/N):So I think you already know that at this point we can not face Black, he is stronger than before and nobody knows how he does that, that's why I need your help and the help of Vegeta

Goku:Well,I have not trained with someone for a long time and I really want to have a fight with you

(Y/N):Will you train me?!

Goku:Sure,I want to see how strong you've become

(Y/N):T-Thanks Dad!

Vegeta:Hmph.....Trunks!

Trunks:Me?

Trunks Present:Me?

Vegeta:You, the one of the future, I'm also going to train you, you and (Y/N) are going to defeat that Black

Trunks:Thank you very much, father

Vegeta:Yeah,yeah just follow me

Vegeta and Trunks left to train at a place near Capsule Corp

(Y/N):......he just called me (Y/N) instead of a brat?

Bulma:Yes, he already got rid of that habit of calling any child that way

Goku:Or maybe he saw how strong you are and you've earned his respect

(Y/N):.....

Bulma:.....

Goku:.....

(Y/N)/Goku/Bulma:The first option

Goku:Well, come on son, I want to see how strong you've become, I want to feel proud again,I have not felt that way for a long time

Goku and (Y/N) flew to a place away from Capsule Corp to train freely,what both did not know is that (Y/N) of the present followed them to see what was going to happen

(Y/N) Present:Let's see how strong I am in the future

Goku:Alright son, the last time I could see all your power was when you became Super Saiyan 2

(Y/N) Present:Super Saiyan 2? I have not yet mastered that transformation

(Y/N):That's right,Dad,but that was before, now I have achieved a new transformation

(Y/N) Present:New transformation? It can be the Super Saiyan 3!!

Goku:New transformation? Then show me, I'm excited to see that new transformation of yours!

(Y/N):Okay, dad, here I go....AAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHH!!!!!!!!

(Y/N) was wrapped in a reddish aura,(Y/N)'s hair became much longer than before and a red coat began to grow all over his chest causing his shirt to break

(Y/N):UAGH!!!....So,what do you think about this transformation,dad?

Goku:Wow!! I've never seen a transformation like that, it's impressive!!! I can feel a great power coming from you,what do you call that transformation?

(Y/N):I call it Super Saiyan 4

(Y/N) Present:Super Saiyan 4? 

Goku:Super Saiyan 4?

(Y/N):I call it that because it was the fourth fight I had with Black when I achieved this transformation,I had to become Oozaru to do some damage to him and then I transformed myself into this

(Y/N) Present:Damn it,my tail was cut off when I was born!!

Goku:That's impressive, I'm very proud of you and I have not said that in a long time, you've impressed me with the power you've achieved

(Y/N):I have to do it, I promised Gohan that I would protect the future and do whatever it takes to do it,let's start with the training

Goku:All right, use all your power!!

Goku became Super Saiyan and he threw himself at (Y/N),he used his tail to stop Goku's fist and threw him back into his place,(Y/N) threw Ki balls at Goku,the achievement to avoid them all but he realized that (Y/N) no longer it was in place

Goku:What?

Instinctively Goku jumped forward dodging (Y/N)'s sword

Goku:You use good strategies, let's see what else you can do

Goku threw a Kamehameha towards (Y/N) but he deflected it with his sword,he took a big leap towards Goku and was about to hit him with his sword but Goku used the Instant Transmission to get behind (Y/N),he tried to hit Goku but he teleported again,(Y/N) walked away from the place trying to find Goku before feeling his ki behind him,(Y/N) grabbed Goku's foot with his tail and threw it in front of him,(Y/N) launched at a great speed towards Goku,once (Y/N) arrived towards Goku,a smoke screen was created in the place and it could be seen that Goku had transformed into Super Saiyan Blue and that he had caught (Y/N)'s fist

(Y/N):Eh?

(Y/N) came out of Goku's grip and jumped away from him,(Y/N) returned to his base form

(Y/N):W-What is that transformation?

Goku:It's something that surpasses the Super Saiyan, this is the Super Saiyan Blue, a power that is among the gods

(Y/N) was surprised to see his father's transformation

(Y/N):It's amazing, I can not even feel your ki

Goku:This is something that I have achieved with a lot of training

(Y/N):Then I will also strive to reach that transformation!

Goku:So, fight with everything you have, I will not contain myself

(Y/N) and Goku returned with their training,(Y/N) of the present watched the whole fight between the bushes

(Y/N) Present:Maybe...maybe if I'm the same as my future self...maybe I'll get Trunks interested in me!

[In The Future-Bulma-POV]

Bulma:Well, this place can serve as a temporary laboratory

I said while turning on the generator making all the machines and computers work

Bulma:All right, it's time to work on reprogramming these four people....let's see what I can do

I said while I was looking at the four containers that I had in front of me

Bulma:(Y/N) is very intelligent to bring these guys to help us, he is very strong.....handsome....brave.....Trunks and Mai are very lucky to meet a guy like him