A roar is heard in the distance and is coming closer

Y/n: What was that roar? It's the same as Acnologia... It's him! (Falls down holding his stomach in pain)

Erza: (Concerned) What is it Y/n? Are you ok?

Y/n: My body is pulsing and I don't know why.

Erza: (Worried) Just stay calm, I'm sure everything will be ok.

Y/n: (Light comes out of Y/n stomach and a golden dragon appears) I'm not hallucinating... Dad?

???: I'm here my son, to aid you defeating Acnologia. Come with me, there is no time to explain.

Y/n: Dad... You're here...How... I will fight Acnologia and end it for good. (Y/n and Bahamut fly up)

Erza: Don't you dare lose against him!

Igneel: Bahamut, you are here as well?

Bahamut: Yes, not just me, but my son too.

Igneel: I have tasked Natsu to defeat that demon, so let us beat Acnologia.

Y/n: I'm on it. God Drive!

https://youtu.be/KQwxKpu-HfA

Bahamut: He has all my powers inside of him. Let us help him, Igneel my friend and defeat Acnologia for good.

Igneel: That's why we are here today.

Igneel, Bahamut and Y/n dash towards Acnologia 

Y/n GOD DRAGON'S DESTRUCTION FIST! (Hits Acnologia)

Igneel: (Fire breath attack)

Bahamut: (Golden light beam breath attack)

Acnologia: You are not going to beat me!

Y/n: There is always a way, to beat you! I just have to beat you harder, until I find it! GOD DRAGON'S HOLY LIGHT! (A giant beam of light hits Acnologia, pushing him back and hurting him)

Y/n: Looks like I'm getting closer.

Acnologia: (Attacks with a beam of magic energy)

Y/n: That is what I have been waiting for. (Eats the magic energy, making the attack disappear)

Acnologia: No! How?! Are you an Elemental Dragon Slayer?!

Y/n: (Smirks) I'm more than that, I'm a God Dragon Slayer! I'm your doom Acnologia!
GOD DRAGON'S SECRET ART GOD DRAGON'S DESTRUCTION BALL!  (A giant golden ball of light forms on Y/n hand and flies towards Acnologia hitting him on the underside of his body and injuring him badly.

Acnologia: I will not give up now. (Forms a giant magic energy ball and fires it towards Y/n)

Y/n: I need to destroy it, it's too big to eat. FINAL FLASH! (The attack gets moved towards the sky
and detonates)

Igneel: Where is Acnologia? He's gone!

Bahamut: He ran away because he knew this would be his death.

Y/n: (Exhausted) Does this mean we won?

Bahamit: We won the battle, but not the war.

Stop Music

Y/n: Good enough for me. (Falls towards the ground. Bahamut catches Y/n before he hits the ground)

Igneel: Looks like Natsu is done already too.

https://youtu.be/JXGcyVZ_Bog

A/n: I use Mirajane's theme as it fits good in my opinion

Natsu: (Runs towards Igneel) Dad I missed you. (Hugs him and tears come out)

Igneel: I was never gone my son, I have seen everything you did. Growing up finding a guild, friends that would never think to betray you. I can't be more proud of you, except I should have made you learn how to dodge. And I even saw that you laid eyes on a mating partner. You did everything I ever expected.

Y/n: And the best part is I decided all our dragons will be living at Fairy Tail with us, Natsu. Bahamut has the power to transform them into humans.

Igneel & Bahamut: (Yelling) Who made you decide that we will live at your guild?!

Y/n: I'm sorry, I was just thinking as you are here now...

Bahamut: It sounds like a good Idea, your guild is not any different than how dragons behave.

Natsu: Does that mean?

Igneel: We will talk to the other dragons now, to hear what they say.

Bahamut and Igneel leave to talk to the other four dragons 

Natsu: I don't believe this Y/n, my dad is back, I waited for so long.

Y/n: I waited for it as well, the day of his return. I'm...

Erza: (Knells beside Y/n) Just let it out, it's ok. Everyone can cry, even you. (Y/n starts to cry out of joy) This is what real happiness is when you can't contain your emotions anymore.

Y/n: (Hugs and kisses Erza) I'm glad that you are save Erza. Bahamut can babysit our child if we have one.

Erza: I really don't know how a dragon is going to babysit a child.

Y/n: A dragon can even raise a child. The prove is in front of you.

Erza: I'm sorry, I forgot that he raised you. 

Bahamut and the other three dragons appear beside Y/n

Bahamut: Ah yes, your mating partner. She is quite the woman, Y/n.

Erza: (Tickmark and yelling) I'm not a mating partner! You over grown lizard!

Bahamut: She's quite a feisty one, she scares me even though I'm a dragon. I forgot you call them wifes, or something.

Y/n: Yes Bahamut, she will be my future wife. We are engaged. (Erza shows her ring)

Bahamut: Well time to tell you my decision about Fairy Tail. (The four dragons transform into humans) We will live there with you, all four of us.

Gajeel: (Crying) This is better than everything.

Metalicana: (Smiling and places his and on Gajeel's shoulder)  You really need to learn more about having friends Gajeel, but I would never think that you make them so fast at a new guild. AND STOP CRYING, YOU LOOK LIKE A WIMP!

Wendy: Mom, is that really the case? (Hugs Grandeeney in her human form) I always wanted to know how it feels to hug you in a human form.

Grandeeney: (Hugs Wendy) Yes, it is the case Wendy, my daughter. I will live there with you in the Fairy Hills dorm. And I will teach you a few more spells that I had no time to teach you.

Bahamut: Are you happy now, my son? You told me you'll always fight for the best outcome in any situation and if there is no way, you make it yourself.

Y/n: This is the best way of getting you back dad. I missed you. You all look so young as humans, how is that?

Bahamut: A dragon can become very old, we are only 25 in human years. Dragons almost don't age their entire life. This is not typical for a dragon, but I can make an exception. (Hugs Y/n) This really is different, as a human form allows me to feel more emotions.

Y/n: So you are full humans now?

Bahamut: Yes, completely. We can change back whenever we want too.

Y/n: I like it more this way. I can show you my house and everything now.

Bahamut: I would take the offer gladly. The only thing you won't show me is the guild hall, right?

Y/n: !? Oh yea, I forgot it got destroyed. What's with Sting's and Rouge's dragons?

Bahamut: They will be at Sabertooth.

Frost: Are you the dragon who raised Y/n?

Bahamut: Yes, I'm Bahamut. You are Frost? When I transformed myself into Y/n I was able to hear and see everything he did.

Erza: (Embarrassed) Does that mean...

Bahamut: I'm not commenting it.

Erza: This really is embarrassing.

Y/n: He's a dragon, Erza. He doesn't see it the way we do. (Pulls Erza to him, to have a family hug with his dad, Frost and Erza)

Erza: Let's go home now, it's getting late.

Y/n: Yes, my Scarlet Angel. Dad you coming?

Bahamut: I'm right beside you.

Home of Y/n

Bahmaut: This really is a nice place you got here.

Y/n: I don't know how dragons do it, but we have a shower and a hot spring you can use, so feel  free to chose which one you want to use to get clean.

Bahamut: Where is the hot spring?

Y/n: Outside, at the left of the garden, near the... (A splash is heard)

Erza: (Giggles) He is not much different than you.

Hot spring

Bahamut: This is nice, now I know why you are in it so often.

Y/n: Glad you like it.

Erza: Let me rub your back Y/n.

Y/n: Just the back Erza. 

Bahamut: This is a life I can enjoy.

20 Minutes later, inside the house.

Bahamut: This is the ice cream machine Frost told me.

Y/n: It's for him, but you can use it too.

Bahamut: (Takes out an ice cream and eats it in one go) Oooh, my head hurts, but it tastes so good.

Y/n: You got a brain freeze, it happens when you eat it too fast. Just take a bite or lick at a time.

Y/n walks to a room

Y/n: This will be your room dad. 

Bahamut: It's surprisingly big. What's that?

Y/n: That's the bed you will sleep in. 

Bahamut: (Jumps on the bed and falls off the other side) This is fun!

Erza: He is supposed to be a dragon, right? I can't see it.

Y/n: He sees new things. I was like this too.

Bahamut: (Crawls on the bed and turns around a few times before laying down)

Y/n: (Dumbfounded) I have no words for this. Dad you are supposed to be under the blankets and lay flat on it, with your head on the pillow. And not sleeping like a cat.

Bahamut: (Laughs) I know how it works, I only wanted to mess with you.

Y/n: Good night dad. (walks away)

Y/n & Erza's Bedroom

Erza: This was a lot for today, for me.

Y/n: Let us do it Erza, I know this look in your eyes. 

Erza: Finally. (Moves above Y/n kissing him with passion)

Bahamut's room

Bahamut: I'm really happy now. What's that noise?

Next morning

Y/n: How was your first night in a bed, dad?

Bahamut: It was new for me, but I enjoyed it. 

Y/n: Here, this is a slice of strawberry cake. Erza likes it, you should try it too.

Bahamut: (Eats a peace of cake) This is extremely good!

Y/n: I'm glad you like it, I made it myself. I make them for Erza, as she always wants some.

Erza: And that is why I fell for you my Love. You know how to make me happy. (Kisses Y/n)

Bahamut: Miss Erza Scarlet, I forgot to Introduce myself in a formal way yesterday. I'm the Dragon God, also known as Bahamut and the father of Y/n. (Takes Erza's hand and kisses it)

Erza: A Dragon with manners and good behavior, now I know where you have got it Y/n. I'm pleased to meet the father of my future husband.

Y/n: We should go. We need to rebuild the guild after all.

Frost: We will have a lot of fun at the guild.

Place of the now destroyed guild

Y/n: Lucy, do you know where Natsu is?

Lucy: No and he even ran off, to train, without me. I wanted to go with him, but he left in a hurry.

Y/n: It's clear to me that you have feelings for him, Lucy. You can't hide them forever.

Lucy: He's just a good friend, that's all. Who is that?

Y/n: This is my father Bahamut.

Bahamut: It's my pleasure to meet the friends of my son. (Takes Lucy's hand and kisses it)

Lucy: What a gentleman you have as father Y/n. You really hit the jackpot, Erza.

Erza: I fell for him for more than that, not just his behavior. (Kisses Y/n)

Makarov: Everyone listen, I have an important announcement to make! I hereby disband Fairy Tail!

Lucy: Master Makarov, you can't do that!

Makarov: I know it's hard for you to understand, but it's for my children's safety. I have my reasons and I will not tell them to you.

Lucy: But Master, Fairy Tail is our home, our Family! How are we supposed to survive?

Y/n: Lucy, (hugs her) everything will be ok. I'm sure this is only temporary. (Lucy cries) I too can't believe that he disbands Fairy Tail, but it's his decision.

Lucy: You are right, we have to make the best of it. Thank you, I'm better now.

Y/n: Just that you know, you are always welcome at my home, if you need something.

Lucy: You really are a kind and gentle man, that's why Erza fell for you. Thank you for your offer.

Erza: He always watches out for his friends, he cares more than anyone of us.

Bahmut: You are supposed to be from a warrior race that is brutal, but I can't see that.

Erza: He still has that in him, it shows when he is at absolute rage. He punched through enemies. Yesterday he executed the chairmen in front of us. He never gives up in a fight, until the enemy is down. He fought one once while being heavily injured, just to protect me.

Makarov: Now search for new lives! Join a different guild! I will do what a parent must do, protect my children! You can all go now, I have nothing else to say.

Y/n: Let's go Erza and dad, we will have something to do.

A/n: In the original story the dragons disappear, but I have no idea why. So in this story they are alive, like they never died. 

One day later

Y/n: Is this the place Silver?

Silver: Yes.

Erza: (Shivers) It's so cold here and you are in boxers?

Silver: I'm an ice wizard.

Bahamut: You will get punished for this Y/n.

Y/n: I know, but I can't do nothing about it. My brain says to do it. (Prepares a magic spell and light appears around the skeleton) Silver, as soon as she's back alive, roll her in the blanket. She will be asleep when I regenerate her body and bring her back, so we will go to the hut where we will wait for her to wake up. (Mika's body is turned back to normal, as it was before she died and Silver rolls her into the blanket)

Erza: You said something of a punishment, Bahamut?

Y/n: Wait a bit. (Y/n get's electrocuted out of nowhere and falls on the ground, smoking)

Erza: Are you alright Y/n?!

Y/n: I'm g...good. That was the punishment for using this spell on living beings, Bahamut rigged it so that it electrocutes me when I do it.

Bahamut: It's to make you use it less.

At the Hut of Silver and Mika

Silver: How long will it take?

Y/n: Should be half an hour, as the body has to warm up to normal temperature. The Hut is warm, that helps a bit.

Silver: I can't believe this, I finally can get reunited with my family.

Y/n: We should keep it a secret, for now from the others. You and Mika can stay at my house for a while, if you want.

Silver: That's really kind, but why would you do it?

Y/n: I do it to make Gray happy. I know how much he suffered in his life. He now has someone who is waiting for his answer. And you will surprise him as well, when Fairy Tail is back. When we are at my house, I will tell you for what I need you help.

Silver: Fine, I can do that and wait a bit longer. (Mika's body starts to move slightly as her eyes slowly open)

Mika: What's happening? Why am I here? I remember that I was outside with you and Gray. Who are these people?

Y/n: Everything will be fine, Mika. You where in a very deep sleep for years and your husband too. I helped you both to get out of it.

Mika: Thank you stranger, but where is my little Gray?

Silver: He kind of went his own way, he's eighteen now and an adult with a girlfriend.

Mika: What? I missed my little boy growing up?!

Silver: I know, but we can get our time with him back now.

Erza: Looks like everything is fine.

Mika: I was dead. How did you bring me back?

Y/n: I used a very powerful time reversal spell, that can turn back the dead into their former living state. Only I and him can use that spell. (Points at Bahamut)

Bahmut: You know Y/n, I never said you can't revive the dead. Just don't revive everyone.