It didn't take Kenshin long to explain, after which Hitomi, eyes shining, gave the unhappy girl a quick check-up. Karin hated medical procedures and wanted to chase the now-relaxed Red, who had strayed from her master's protection.
"Incredible! She's completely transformed!" Hitomi said in shock, examining the structure of internal organs, integrity of chakra channels, development of bone and nervous systems, concluding that Karin was the healthiest girl she'd ever seen.
"She still hasn't ignited her chakra node, but even now she has strength close to a Genin... Simply astonishing! This child will grow into an incredibly fearsome Kunoichi!" she declared joyfully, stroking the embarrassed girl's head and enjoying the softness of her silky red hair.
"So I can protect Mom and Dad?" Karin asked with shining eyes.
The newlyweds couldn't help smiling at her righteous and noble intentions. However, Kenshin had firmly decided not to let his daughters or wives into combat, but he still planned to make Karin the strongest possible Kunoichi so she could stand up for herself.
The evening ended quite unusually. It took Kenshin great effort to dissuade Karin from her obsessive idea of sleeping with her father and mother. Only by offering to sleep with Red instead did the girl agree, picking up the huge cat and haughtily carrying it to her room.
Kenshin, in turn, had no intention of sleeping until morning. This night obligated him to devote all his attention to his new wife. As soon as they were alone, Keiko softly loosened the fastenings on her dress and elegantly stepped out of it.
In the dim moonlight filtering through the window, her alluring body couldn't fail to captivate Kenshin's gaze. She wore nothing but neat black panties and stockings up to mid-thigh. One look at her was enough for Kenshin to forget everything, pull her onto the bed, and give her an unforgettable night of love.
On the morning of day 446, Kenshin proudly presented his new daughter to all family members. If the sons were only mildly surprised, Aya, Natsumi, and Noriko were in complete shock. They noticed Karin's massive changes at first glance and couldn't help marveling at Kenshin's powerful ability.
Everyone immediately saw how much Karin's status in the family had risen and that she had become her father's undisputed favorite. In half a day of relaxation with the family, the red-haired girl was pampered and kissed countless times by her newly acquired father.
For Kenshin, everything that happened was only a bit strange. Though he received no false memories of Karin always being with him, he felt indescribable kinship. She was like the best part of himself, and just one glance at the joyfully frolicking girl made his heart resonate with warmth.
Kenshin unobtrusively tested Karin's physical abilities during the first half of the day by suggesting various games, and the results didn't leave him indifferent. Just a few days ago, she could barely climb a high tree branch and then asked adults to get her down.
But now, not only had her physical strength increased, but her grace had multiplied many times. Karin could climb any tree without issue and then perform almost any exercises without losing coordination. Her jumps were incredibly precise, and her reaction allowed her to change position in a fraction of a second, ending up somewhere completely different.
Kasumi, Noriko, and Ichiro could only nod with pleased smiles and ask Kenshin for the right to train her. But Kenshin smiled and refused them all, declaring that he would be her personal teacher. This statement stunned everyone present, as besides sparring and sharing info, he hadn't taught anyone except his older sons when they were little.
Karin was incredibly proud of herself and asked her father to start lessons as soon as possible. Kenshin was happy to fulfill her request and scheduled the first lesson for after lunch.
Makoto was a bit unhappy that he would only train Karin and also begged to be taught. It wasn't hard for Kenshin to give advice to both, so he easily agreed to train the two friends.
At one o'clock, Kenshin finally got to work creating several carriages for personal use, as regular wagons were incredibly slow and inconvenient, greatly slowing the transport of goods and resources.
Moreover, he first thought about starting to change this world from small things, and after creating five incredibly sturdy cargo wagons in an hour, he decided to sell two in Shukuba city to spur people's inventiveness and make them notice the huge convenience of these wagons.
It took him only two minutes to implant knowledge of wagon handling into the Twelfth's mind and send him on another deal with the Kimura family's military pavilion. He still hadn't forgotten about the "house of flowers" and planned to hand those people's fate to Makoto, Meyumi, and Noriko in the future.
He spent the rest of the day fully occupied. An hourly sparring with the Fifteenth cost him cracks in two ribs, and training the two cunning girls turned out much more challenging than expected.
Karin and Makoto were very naughty and lost all seriousness at the slightest softness from him. That's why Kenshin had to devise various ways to channel their endless energy properly.
The solution turned out incredibly simple, as the girls loved all endurance training, and paired training only motivated each to achieve better results than her friend.
Makoto had long awakened chakra, so she didn't lag behind Karin in any physical feats. In the end, both girls' muscles were overstrained, and half an hour after training, they could barely stand.
"Well, well... You've got it good!" Noriko laughed upon entering the room.
Kenshin just shrugged, pulled both sweetly sleeping little ones to him, and scratched the belly of Red, who was purring like a tractor.
"Hitomi is looking for you so that you can cover Keiko right in front of her eyes," Noriko said in a calm tone, causing Kenshin to nearly choke on what he heard. All his sleepy state instantly dissipated, and his gaze locked onto her yellowish, predatory eyes.
""W-what? Why?!" he exclaimed in a whisper, turning to Hitomi who had entered the room.
""I need to study the phenomenon of the 'longevity flower.' Perhaps I can understand how the painless surge of chakra occurs, strengthening the partner's body," she replied in a calm tone, sitting down in an armchair and stroking Makoto's head.