By evening of the next day Keiji finally fully grew up and could hear his father's mental commands. Kenshin was glad and immediately involved his son in training, giving him exactly the same training programme as Ichiro.
Ichiro had made some progress in chakra control and although he still couldn't walk on walls, he could virtuously jump from tree to tree or wall to wall, lingering for half a second and then pushing off the wall to jump higher, but only if there was another wall on the opposite side. He was best at jumping from tree to tree, pushing off one and landing on another.
Keiji really wanted to become as strong as his older brother, so he plunged headlong into training, awakening chakra in himself quite quickly following his older brother's advice.
Every evening the two brothers held sparring sessions under their father's competent guidance and became stronger every day.
Keiji's talent was even slightly higher than his older brother's and amounted to 17 units, one unit higher than Ichiro's. Kenshin wasn't in a hurry to draw conclusions based on ephemeral "talent" indicators. He believed that talent was important, but without hard work no talent would help.
Kenshin decided not to have new children for now. He wanted to find a kunoichi, raise his level, and only then have new children with Aya. It was disgusting to him even to think about it, but the thought of losing his children in the whirlpool of upcoming events was even more undesirable. He refused to treat his descendants as bargaining chips to achieve goals. For him they were those very babies who stomped with little feet on his chest preventing him from sleeping.
For the entire next week Ichiro and Keiji trained intensively. Keiji caught up with his brother quite quickly in strength and speed, apparently nourishing his muscles and internal organs with chakra, but still noticeably lagged in technique.
Every day Kenshin made his sons spend at least an hour training in throwing shuriken and kunai, setting a live example and training himself. Sparring with kunai was not held for obvious reasons, but Kenshin found a pretty good alternative and threw small pebbles at his sons, forcing them to deflect everything with kunai. After a few days he switched to shuriken, and both his sons learned quite quickly to deflect objects flying at them.
Kenshin and Aya's sex life had faded a little, but still every few days he ambushed his wife in the shower or dragged her into the bedroom and thanked the soundproofing formation for containing Aya's incredibly loud moans. She knew no one could hear them, so she didn't hold back and screamed at the top of her lungs when the head of his large cock crashed into her small uterus, sending sparks into her blue eyes.
On the fifty-fifth day after Kenshin's arrival in this world another batch of wine matured, and Kenshin decided to sell a record large batch. Twenty bottles of ten-year vintage and five bottles of twenty-year vintage. Kenshin "ordered" Aya to stay home and not go out unless necessary because he was taking both sons with him.
"Be careful…" Aya whispered and hugged each in turn, kissing Kenshin.
"Don't worry, mom, everything will be fine, father and I have already visited the city more, and everything was okay!" Ichiro declared, adjusting his backpack.
"Yes, mom, don't worry. We'll bring you a roll of silk so you can sew something!" Keiji said and smiled showing all thirty-two teeth.
"Don't be bored, dear. And remember, don't leave the house unless absolutely necessary," Kenshin reminded her and, hugging her one last time, turned and stepped outside.
As soon as Aya saw the three receding backs her heart sank. She suddenly felt something very bad and called out: "Kenshin!"
"M? Something wrong?" he asked turning around.
"Yes, mom, what happened?" cheerful Keiji asked, eager to go to the city.
"Um, no, nothing…" she muttered and smiled strainedly.
Kenshin shrugged, turned, adjusted his backpack, and took a step forward; his two sons followed him.
****
By one in the afternoon the trio reached the city without incident and immediately headed to the wine shop.
The old salesman, seeing five bottles of 20-year vintage wine, first didn't believe his eyes and stared at Kenshin.
"W-where did you get this wine?" he muttered, returning to contemplating this, in his opinion, work of art.
"Sir, I already explained, our late grandfather was a wine collector, and these are his most valuable stocks. We three grandsons decided to sell this wine, rightly reasoning that our grandfather's labour into which he put his whole soul should not go to waste, and who if not a wine collector can appreciate it properly?" he delivered the pre-prepared speech.
"You're right, young man, you're right! Wait a few minutes, I need to check it properly," the old man said and stepped into the back room behind him. A few minutes later he came out holding five sheets of paper with a strange hieroglyph. He stuck one sheet on each bottle, and a minute later when all the sheets turned dark yellow he hummed satisfiedly.
"Indeed! More than twenty but less than twenty-five! This is a real find! I'm ready to give you 6000 ryo per bottle," the old man declared without taking his eyes off the bottles.
"We agree!" Kenshin immediately agreed. He wasn't in a position to argue, and besides, with the money earned he could "age" as much wine as he wanted.
A few minutes later the old man counted out 37,000 ryo and handed them to Kenshin who quickly recounted the money and hid it in a secret breast pocket, then hurriedly said goodbye to the salesman and accompanied by his two sons left the door.
As soon as Kenshin and his two sons left the wine shop, a sturdy guy of about sixteen with a Konoha forehead protector on his forehead came down from the second floor; he politely said goodbye to the old salesman and went outside.
On the second floor of the wine shop was an elite hall for connoisseurs of expensive wine; being there the black-haired Konoha shinobi with sensitive hearing heard almost the entire conversation between Kenshin and the old salesman; hearing about the cost of five bottles of twenty-year vintage wine he couldn't restrain greed. Each bottle of wine cost more than a D-rank mission reward, and he decided to act.