Dan placed his hand with surgical focus on Nanami's bare skin as she lay before him; applying the seal required direct physical contact. He had begun the systematic process of placing the first-tier Vitality Seal on each of his wives, one by one. He dedicated a full day to each woman to ensure the complex procedure was finished with absolute precision, refusing to rush a task where a single mistake could be fatal.

  Initially, when Dan first explained the seal, the women hadn't grasped the technical details. But as he finished the first few and the rest saw the results with their own eyes—and felt the staggering effects on their own bodies—a fire of excitement lit up in them. They began waiting for their turn with restless anticipation.

  The Vitality Seal didn't just extend life and harden the body; it physically rejuvenated them. Blood saturated with healing chakra nourished every cell, granting their skin an incredible radiance and silkiness. It erased minor imperfections and gave their entire bodies a vibrant, healthy glow. Though they were all still in their twenties and showed no real signs of aging, women naturally prize beauty. The prospect of becoming even more radiant—and staying that way for nearly two centuries—was intoxicating. Dan added to this excitement by promising that the seal would lock their youthful appearance until the very end of their long lives.

  This incredible promise sparked a wave of joy, but Dan didn't stop there. He used their enthusiasm as leverage to push their development further. He told them, in his usual calm and cold voice, that if they reached a level of strength he deemed acceptable, he would grant them the Improved Vitality Seal. This version would extend their lives to over three hundred years and maintain their appearance as if they were in their early twenties for centuries.

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  Following this ultimate incentive, a near-frenetic passion for training swept through the household. The wives began pushing themselves with a ferocity Dan had never seen before. Even the children looked on in confusion, wondering what had suddenly possessed their mothers to train for such grueling hours. Dan watched this shift with quiet approval; he knew that the right motivation was the key to peak performance, and for them, the promise of eternal youth was even more seductive than the desire for power itself.

  Dan set the benchmark for the next seal at the "Kage" level—the rank of the village leaders who would emerge in the future. He knew reaching such a height would take years of dedicated labor for most, though Rin and Kali were already closing in on it. As for Dan's own current power, he objectively estimated he had already surpassed the future legends, Hashirama Senju and Madara Uchiha. He felt a single punch could now vaporize an entire mountain range, and his chakra control was reaching a level beyond imagination.

  Despite this, he humored no delusions; he knew he hadn't yet reached the level of the Sage of the Six Paths. That was a different tier of existence entirely. However, Dan was certain he would eventually surpass even him. This wasn't arrogance; it was logic. He had centuries of life ahead of him thanks to his seals, and a willpower that had never wavered for a single day since he arrived in this world.

  After hours of intense concentration, Dan finished Nanami's seal. She opened her eyes slowly, feeling the new surge of energy anchoring into her bones. She smiled with deep gratitude, threw her arms around him, and whispered softly, "Thank you, my husband." Dan returned the embrace, replying simply, "There is no need for thanks. You are my woman, after all."

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