There was no way around it, eating was the most important thing, but John wasn't in a hurry. He did some push-ups while waiting for Karin to finish his breakfast.
Even the most lavish breakfast wouldn't take long to eat, especially since Karin's breakfast wasn't very filling.
John was curious and asked Karin, "Karin Sage, do you like to eat fish?"
"Meow... Of course, I do. I'm a cat, and cats love to eat fish," Karin replied happily.
Upon hearing that Karin loved fish, John nodded silently, and an idea came to his mind. He planned to use fish to trade for Karin's Senzu Beans, rather than let Yajirobe waste them.
However, the story of obtaining the Senzu Beans would come later, as it was still almost three years before the appearance of Piccolo Jr.
Karin didn't pay attention to John's thoughts and instead focused on his own. After cleaning up his dishes, he approached John and said, "Meow... Let's see how strong you are and if you're worthy of the 'Super Divine Water.'"
The two of them took their fighting stances, and John launched the first attack. Karin, being very agile, jumped into the air, and his staff struck at John's waist.
However, John had used a feint, and Karin's staff only hit an afterimage.
The Afterimage Fist, Karin's signature move, was something Master Roshi had learned from Karin, and later, John and Goku learned it from Master Roshi.
Karin was surprised that John had used his own invented technique.
Seeing that Karin had been fooled, John immediately lunged towards him.
Karin wasn't one to be easily defeated, and he quickly countered John's attack with his staff. Then, he jumped onto the roof and dove towards John.
John jumped into the air, and with a flying kick, he struck out at Karin.
However, John's kick passed right through Karin, who had also used the Afterimage Fist. After a few exchanges, they both landed back on the ground.
"Meow... Young man, you're really good. I didn't expect your Afterimage Fist to be so well executed," Karin said, pleased, his mustache twitching slightly.
John smiled and said, "It's nothing. I'm still not as good as you, an elderly person."
Upon hearing John's words, Karin became displeased. He was a terrible conversationalist, and he said, "But in martial arts, it's all about strength. Techniques are just an added bonus, but they're not the deciding factor. Your speed is too slow."
After saying this, Karin disappeared from his original position, and his ki floated in the air, making it difficult for John to sense his location.
John kept following Karin's ki, constantly changing his position.
"Here!" John kicked out, but his kick missed, as Karin had already moved.
"Bang!" Karin kicked John, sending him flying.
Karin was surprised and said, "I didn't expect you to use your ki to sense my position and attack. You're not very skilled at it yet, and your speed is too slow."
John wasn't discouraged, as he knew that he had come to Karin Tower to learn from the best.
"Meow... Today's training is over. Keep practicing, and when you think you're strong enough to challenge me, come back," Karin said.
John nodded and looked at the bottom of Karin Tower. The most important trait of a Saiyan was their ability to constantly break through their limits. So, he jumped off the tower and climbed back up.
He didn't actually jump but climbed down and then climbed back up.
John repeated this process for three days, using the Senzu Bean to restore his energy. He managed to reduce the time it took him to climb Karin Tower from a day to just one hour.
On the last day, John climbed Karin Tower so fast that he seemed like a gust of wind. He blew past the white clouds as he sprinted from the bottom to the top of the tower.
Feeling that he couldn't improve his speed any further, John challenged Karin Sage again.
Karin had been closely observing John's training over the past few days, and he was surprised by John's use of climbing Karin Tower to train his speed. John's strength had increased significantly, and Karin had a feeling that he was about to lose his first match in many years.
The two of them took their fighting stances again, and John launched a frontal assault. Before Karin could react, John was already in front of him.
Karin was startled and jumped backward to dodge John's attack, but John didn't strike. He had only wanted to scare Karin.
As Karin jumped backward, John smiled and leaped into the air, dodging Karin's staff. He grabbed Karin's tail and lifted him off the ground.
John held Karin upside down, and Karin struggled, shouting, "You little rascal, put me down!"
John smiled and said, "Then give me the 'Super Divine Water.'"
"Fine, I'll give it to you," Karin said angrily.
Hearing Karin agree to give him the 'Super Divine Water,' John put Karin back on the ground.
Karin smoothed his ruffled fur and said to John, "You're just like Master Roshi. You're both such troublemakers."
John rubbed his nose, unsure of what Master Roshi had done to offend Karin, and he didn't dare speak.
"Come with me," Karin said, leading the way to his bedroom.
In the corner of Karin's bedroom were several jars, which he used to observe the entire Earth.
These jars also led to various alternate dimensions, where Karin stored many of his belongings.
Karin opened one of the jars and took out a thick porcelain teapot with a large 'God' character on its body.
John was curious and asked, "Karin Sage, are you going to give me the 'Super Divine Water' so easily? Don't I need to go on some kind of adventure to get it?"