Vegeta is looking at Kaito's pathetic state and said "Please don't tell anyone I lost to a pathetic bastard like you who is changing diapers everyday."
"You will understand when you get your kid." Kaito said.
"You can stay here changing his diapers while I spar with Goku. I am going to surpass him." Vegeta said and left.
That day, Goku was kicked out of his house to go and search for a job after he meets Gohan's teachers in West city.
Chi-Chi wanted Goku to learn to socialize and meet normal people so that he can learn how to stay in the city.
She regretted doing it when Gohan called her saying that Goku flew out with Vegeta of the room when Vegeta came and challenged him.(I don't know why but, I feel that this sounds wrong. I don't know what I just wrote.)
Vegeta got to know about Goku when Goku and Gohan visited Bulma to see Leo. Vegeta sensed Goku's ki and followed Goku to Gohan's school.
They went out of the city and started sparring. Goku and Vegeta both exchanged many attacks, with many colliding and cancelling out each other's attacks.
Vegeta stops for a moment and asks "Kakarot, why are you not using super Saiyan form to fight with me?"
"It's because when I turn super Saiyan, the fight will get over immediately. I want to have fun sparring." Goku said with an innocent tone. Goku just wanted to spar with Vegeta, but not using his super Saiyan form angered Vegeta.
He said "Everyone, you that Kaito, everyone is looking down at me like I am a weakling. Me, the prince of all Saiyans, has fallen to such a level that I am being played around. I can't accept this."
He was filled with rage. His strength has increased a lot since he fought Frieza and his daily thrashing in Kaito's hands activated the broken ability 'Zenkai boost'.
He couldn't digest the fact that Goku became a Super Saiyan and Kaito is beating him with a single blow.
His anger was the trigger for an absurd increase in his power that kept increasing. The earth started shaking, with small tremors all over the world.
There wasn't that much disturbance like when Goku turned Super Saiyan but, there were changes in the surrounding reacting to his rise in power.
Vegeta's hair had flashes of golden color. Vegeta shouts and his hair completely turns golden.
He has a golden aura around him and his hair and eyebrows turned golden.
Vegeta stops shouting and looked at himself. He has a smile on his face that slowly grew wide.
He then starts laughing and says to Goku "Hahahahaha.... Kakarot. Look at me. You are just a weakling who managed to become a Super Saiyan by fluke. I am an elite among the Saiyan and I have become a super Saiyan. Now, I will beat both you and that Kaito for humiliating me."
"He turned into a super Saiyan without getting angry. It is completely different from when I turned super Saiyan. Well, it is fun to spar with you now." Goku said and turned into a Super Saiyan.
Goku was waiting for Vegeta to attack first. He decided to give Vegeta time to adjust to the new power.
Vegeta looks at the city in front of him and said "I will defeat both you and Kaito. Then all will understand that you weaklings are below me, a super elite amongst the Saiyans."
He knew Kaito wouldn't fight him seriously even now. Vegeta had seen Goku challenge him many times and loose every time. Even when fighting Goku, Vegeta noticed that Kaito was holding back.
He disappeared and appeared near to the city. He shot countless energy blasta towards the city.
"Now, he will fight me seriously. He loves his wife and will fight with me to protect her and his son." Vegeta said.
He heard a series of explosion and looked at the direction of the blasts. They were not on the ground, but in the sky. They blasted in mid air.
There was smoke accompanying the blasts. He didn't even need to see, to know who did that.
Vegeta clicked his tongue and said "Kaito, you came faster than expected. I thought I would get to destroy things for a while."
"What do you want now Vegeta?" Kaito asked in a bored tone. He didn't even show any importance to him.
"That careless attitude is what angers me the most." Vegeta shouted and flew towards Kaito to kick him.
Kaito vanished when Vegeta got closer to him. Kaito appeared before him again and said "I get it that you want to fight me. Let's take this somewhere else."
Kaito then did a tornado kick which landed on Vegeta's face and sent him flying away from the city.
Vegeta couldn't even react to Kaito. All he could do was see Kaito kick him and fly.
He crashed into a nearby mountain. It made a huge crater in the center of the mountain.
Vegeta flew out of the crater and was hovering in front of Kaito.
Goku used instant transmission and appeared there. He looked at Vegeta and shouted "Hey Vegeta, why did you try to attack the city?" but Vegeta didn't even care about Goku. He kept staring at Kaito.
Kaito's kick landed on Vegeta's face. He had a bloody nose and a red face. He shouts at Kaito "How is this possible? I am the legendary Super Saiyan that is said to be the strongest in the universe and yet I can't even react to a lowly pest who can't even turn into a super Saiyan."
Kaito looked at Vegeta with a silly face. Then he bursts out laughing.
"Pfffhahaha.... Vegeta, you sure are good at imagining things. Since you made me laugh after a while, I will tell you two facts. One, the Super Saiyan form is not the strongest and it never was." Kaito said.
Vegeta was in disbelief when he heard that but then, he remembered the night Kaito said that stronger villains are going to come.
Kaito continued "Second, I can also turn into a super Saiyan."