Saiyan In The FRANXX

A/N: Really shouldn't be starting a new fic now but I'm inspired after watching Darling In The FRANXX so here we go. Also, the starting won't be Gohan in the cell arc this time Goku will take his place! It will be after the universe survival arc. Let's get started.

DBZ world

It was a few months after the Tournament of Power and Goku was training with Vegeta and Whis in the god of destruction's world. "Come on try to hit me!" Whis jokingly said as he was training Goku and Vegeta at the same time "Tch! Out of my way kakarot!" Vegeta shouted as he pushed Goku out of his way and charged at Whis Goku just smiled and watched as Vegeta was getting nowhere with Whis. "Alright my turn Vegeta!" Goku said as he charged at Whis but to no avail. "Alright stop!" Whis said as he promptly pushed Goku back to where Vegeta was and looked at his staff seeing that it was glowing "Someone is trying to contact me." "A message from Grand Kai! It says that Goku has been summoned to meet them… It is urgent we shall take our leave now!" Whis stated as he touched Goku and was instantly teleported to the world of the Grand Kai. Vegeta was just left there stunned and wondering what he should do.

Grand Kai's palace

When they arrived at Grand Kai's palace, they saw the angel of universe 5 standing beside the Grand Kai. "Goku the reason we have summoned you here is because we need your help in saving another universe." Grand Kai seriously spoke. "Your goal is to save this universe from being taken over by a collective… or VIRM so as to name them. Currently with the inhabitants on that world there is only a 30% chance in which they can defeat VIRM. Anything that attempts to rival us Kai's in destruction and creation must be taken care of at 100% is it possible for you to help us?" Grand Kai questioned. "Will there be strong enemies to face? If so, I'm always ready to up my game!" Goku said as he felt his Saiyan blood ready for a fight. Grand Kai responded with a very assured yes and told him that once the deed is done, he will return at around the same time he left so that technically no time is wasted. "However, there is one complication, seems that most of the fighters in the world are children, in this world humans have managed to attain immortality but at the price of fertility, however children are still born to help pilot fighting Mechas called the FRANXX. In your current adult body, you will look suspicious I shall rewind you back to when you were a child and you will still have your powers to fight back against the enemy. However, try to blend in as much as you can as we Kai's are only able to give minimal help in these worlds." Grand Kai said. Goku nodded and waited for Grand kai to rewind his body back to when he was a child. "O Supreme Kai of time grant me the power of yours to reverse the one in front of me!" Grand Kai chanted as a ball enclosed Goku and he slowly felt himself shrinking and his limbs shortening. After the spell was cast, he saw everything was bigger and he looked at himself he guessed that he was about 10-12 years old at best. He tried to power up to super Saiyan blue and was glad that it had worked. Once he was satisfied, he turned to Grand Kai and said "I'm ready!" Grand Kai nodded and waited for the Angel of universe 5 to retrieve Goku and told Goku that arrangements had already been in place once he arrived at the world. Goku nodded and soon enough they vanished and disappeared from the palace.

Darling In The FRANXX world

"We have arrived" the Angel of U5 said. Goku saw a barren land before him that looked as if the life of the planet itself had been drained "Make your way to that dome over there" The angel said as she pointed to the 13th plantation. Goku nodded and wished the angel well as he made his way over wondering how things were going to go for him.

In Mistilteinn

The 13th unit were having fun around the table as usual eating heartily and since "Oi where's Hiro?! He's going to be late for the presentation ceremony!" Zorome, a blond hair big eyed person shouted "We don't even know if he is coming for the presentation ceremony or not!" Miku, a Pink haired, cheery girl said "All right lets all calm down!" Ichigo, a blue haired female said "We shall see what miss Nana says! Right Goro?" She looks towards a tall boy with glasses and short blond hair "Yep! We shall wait." He says with conviction and looks at everyone. Suddenly a woman with red hair comes in "Miss Nana!" Everyone shouts as all the children turns their attention towards her. "Now calm down." Miss Nana says as she continues "Please get dressed for the ceremony and as for Hiro he will not be joining you. Also, since Naomi left, I would like to introduce to you someone who would fight alongside you in your future battles!" Miss Nana said "Goku appeared from behind and waved at them and gave them the famous son grin while saying "Yo!"

"Let me introduce you to Goku!" Miss Nana says as she continues "Goku will not be piloting any FRANXX in fact he is a special parasite as said by Papa! He will fight alongside you all in this state. However, he won't be present at the ceremony! He will be resting in Mistilteinn learning his way around the place!"

Everyone looked at Goku strangely but the first one to welcome him was Goro as he stretched out his hand and said "Pleasure to meet you my name is Goro!" Goro sheepishly said he went on to introduce everyone else like Zorome, Ikuno, Ichigo, Futoshi, Mitsuru, Miku and Hiro even though Hiro was not present at the time. Goku smiled and greeted everyone when suddenly Miss Nana interrupts and says that they need to go for the presentation ceremony. Goku gets settled in and decided to explore the place a little while more.

Time skip to ceremony

While the 13th unit were getting ready to present their FRANXX to the world suddenly they felt a vibration "What's that?!" Ichigo asked Goro "Tch it can't be!" Goro said when suddenly the PA system announced "Klaxosaur alert. Please evacuate the area immediately."

A/N: Wew sorry to stop here but I got to go hope you enjoyed and se you in the next one!