Months had passed since Rin and Hina's pregnancy. Now, nine out of the twelve girls were pregnant. The general atmosphere had changed slightly; there was constant movement, talk about the coming children, and various preparations. However, three girls had not yet conceived: Kali, Kyoko, and Nina. These three maintained their physical training program under Dan's supervision. Every morning, they would wake up at dawn and begin their harsh exercises. While the pregnant girls rested and took care of themselves, Kali, Kyoko, and Nina trained without stopping.
As they continued training, they began to feel anxious—anxiety about not getting pregnant and that they might be less fortunate than the others. Dan noticed this tension, and one day, he gathered them and said in his calm voice, "Not being pregnant now is in your favor." They looked at him with surprised eyes. "You can train without stopping or delay. This means you will become much stronger than the others. Pregnancy will come in its time. There is no need to worry." His words reassured them a little, but the tension did not disappear completely.
Dan understood that this tension was due to the way people thought in this era. For women, especially in traditional societies, having children was evidence of value, importance, and belonging. Kali, Kyoko, and Nina felt the pressure and the need to prove themselves. Therefore, they frequented Dan's house at night heavily, without stopping, in intense competition among themselves to get pregnant as soon as possible.
Dan didn't mind much. Originally, due to his strong physical fitness, there was no effect on him. His body, strengthened by the Vitality Seal and constant training, possesses a very large endurance capacity. In fact, it was comfortable and enjoyable for him as well.
The other thing occupying Dan's mind was his training. In the past months, he had made massive progress. He could now train at a depth of three hundred and seventy meters underwater. The pressure at this depth was terrifying, enough to easily crush any ordinary human. But his polished body endured it and even benefited from it. This increased his strength significantly. His physical strength became massive, and his chakra reserves also improved, doubling several times from what they were a while ago. He improved in almost every aspect.
His speed became superhuman. If he moved at his maximum speed now, the naked eye could not even see his trace. He would disappear from one place and appear in another in an instant, like a ghost. But this speed created a problem. When moving at this level of speed, he produced a loud sound from piercing the air and left a clear trail when exceeding the speed of sound.
Therefore, Dan developed a new movement technique. He used chakra sharply in front of his body while moving to cut the air and atmospheric pressure ahead of him. Like a knife cutting through the air, he creates an empty passage for his body to pass through. In this way, when he moves at his superhuman speed, he leaves no trace or sound. Instead, he moves in absolute silence, without any sign of his presence. This greatly increased his combat arsenal. He became able to approach enemies without them feeling him, attack from nowhere, and escape without being followed. It was a very valuable technique. He also has another idea for a movement technique that he will work on developing, though the idea was not yet mature or ready.
As for the Vitality Seal, Dan feels he is very close to creating the improved version. He spends long hours every day in his lab, working on the fine details. The improved version includes several things: trapping chakra inside the body to prevent leakage, spreading the seal in the muscles to nourish them directly, and improving the efficiency of the current seal on the bones. Therefore, it is very complex work requiring amazing precision. But Dan is confident he will complete it soon, perhaps within a month or two.
Days passed quickly. Life in the camp was quiet and routine but full of development. The pregnant girls were changing over time, their bellies swelling. Rin was the closest to giving birth; her belly was very large now. Of the three non-pregnant girls who were training relentlessly, Kyoko and Nina recently became pregnant. Their joy was great, and they felt immense relief. Finally, they achieved their goal and became like the others.
Only Kali remained—the only girl who had not yet conceived. She began to feel great pressure and deep anxiety. But Dan continued focusing on her, her training, and her development, which reassured her a little, although she was still trying hard to conceive quickly.
In fact, Dan admired Kali's perseverance. She was the most serious in training, the most persistent, and the most focused. She never complained, never gave up, and just continued the hard work. The results were clear. One day, after training ended, Dan called Kali alone. He looked at her with his calm blue eyes and said, "You have a strong talent." Kali's eyes widened slightly, surprised. "Your physical strength has improved quickly, much faster than the others. Soon, I will teach you the way of refining chakra. You have reached a suitable level."
Kali felt a massive joy fill her chest. Chakra refining—it was the next step Dan had mentioned to them. She bowed deeply. "Thank you, sir! I won't let you down!" Dan nodded his head. "I know."
In fact, Dan was confident in his ability to polish the girls to a good level. Most were young, not exceeding twenty years of age. They still had a long time to develop, grow, and build strength. Especially with his directed training, his experience, and his deep understanding of unconventional training methods, he was confident they would become powerful—perhaps not at his level, but much stronger. This was useful to him: a strong family, women capable of protecting themselves, and talented children inheriting his Kekkei Genkai. He was building something bigger than just his personal power; he was building a legacy.
That night, Dan sat in his lab, looking at his notes on the improved Vitality Seal. He was very close to completing it—a few more weeks, maybe a month at most. Then he would apply it to himself. And then, his strength would improve again, significantly. He looked through the window at the full moon in the sky. How much time had passed since he moved to this world? Many years. But he remembered how he was in the beginning: weak, afraid, barely able to refine chakra. And now, he has become stronger. And he will become stronger. Always stronger.
Dan smiled a slight smile. "Immortality. Soon." He closed his notes and stood up. Tomorrow, the work would continue—on the seal, step by step, toward the final goal.