The next morning, shouts echoed outside Tsunade's small courtyard.
"Lady Tsunade!"
Tsunade had woken up early, intending to take Reiki to the hospital to teach him some new medical ninjutsu. Curious, she strode to the door.
"Hinata Nobu?" she asked, surprised. "Has something happened in the Hyuga clan?"
It was unusual for the Hyuga clan to seek help from other clans, especially in such a direct manner. They were known to be a self-sufficient, reserved family, focused on safeguarding their secrets and autonomy.
"Yes, Lady Tsunade," Nobu replied, looking anxious. "My son… Roy Medical Ninja, could you come with me to see him?"
Reiki, who had just arrived, caught part of the conversation. "Your son? Is it Tetsu?" he asked, remembering the young Hyuga he'd treated the previous day.
"Yes, it's Tetsu," Nobu confirmed. "Something… something is happening to him. I can't explain it well, but please, come quickly."
Reiki glanced at Tsunade, and she nodded. Together, they followed Nobu to the Hyuga compound, winding through the clan's traditional hallways to a secluded courtyard that served as Nobu's family home.
Upon entering, Reiki immediately sensed a peculiar energy in the air, though there was no sign of severe injury indicated by his system. However, as they stepped inside, they saw Tetsu lying on the floor, seemingly unconscious.
Reiki rushed forward, beginning a preliminary examination.
"An abnormal chakra… but no major health issues," he muttered, confused. "If there was a real problem, my system should be alerting me…"
After a thorough check of Tetsu's body, Reiki realized something critical: Tetsu wasn't ill or injured—he was undergoing a transformation, and the origin of that change was in his Byakugan.
"Hinata Nobu, Tetsu's health is stable, but it's his Byakugan that's causing this reaction. I'll need to stay here and monitor him to help him through this transition," Reiki explained.
Turning to Tsunade, he added, "Teacher, I'll need some medicinal ingredients to boost his physical resilience. A medicinal bath would be ideal."
"His body isn't strong enough to handle the chakra changes from his Byakugan?" Tsunade asked, raising an eyebrow.
"It seems that way, but I can't determine the exact nature of these changes yet," Reiki replied. He carefully began restoring Tetsu's chakra pathways with a minor healing potion to stabilize him further.
Within ten minutes, Tsunade returned with a medicine pack and various herbs. "Nobu, boil some water and place this medicine pack in it," she instructed.
Nobu nodded, leaving to prepare the bath without question.
"Reiki, this situation—is it related to you treating Tetsu yesterday?" Tsunade asked, her tone serious.
Reiki nodded. "Yes, yesterday I treated Tetsu's Byakugan. It seems I may have triggered this reaction without fully understanding its effects."
Tsunade's eyes widened in realization. Treating a bloodline-related condition was something every medical ninja aspired to achieve, yet it was an extremely elusive goal. Unlike common injuries or illnesses, the nature of bloodline limits and their associated diseases remained a mystery, even to advanced medical practitioners.
"Well, Reiki," she said thoughtfully, "if you've found a way to treat a bloodline-related issue, you're stepping into uncharted medical territory."
Reiki smiled slightly. "Teacher, could you please check him again and see if you notice anything else?"
Tsunade nodded, placing her hands over Tetsu's body, using her chakra to inspect his vitals. Almost immediately, she noticed something remarkable.
"His body… it's actually getting stronger!" she said, stunned. Normally, physical strength increased only through rigorous training. Yet here, Tetsu's body was slowly adapting, becoming sturdier as his chakra flowed.
Reiki's expression turned serious. "His body is changing, and it's happening in a way that's beneficial. My role now is to help him manage and stabilize these changes."
Tsunade nodded in approval, trusting her student's instincts. "Let me know if you need anything. I'll make arrangements at the hospital and give you the space you need here."
She stepped out, leaving Reiki to continue his work.
Before long, Nobu returned, carrying a large tub filled with the steaming medicinal bath. Reiki carefully lifted Tetsu and placed him in the tub, making sure his body could absorb the nutrients from the medicinal herbs.
As the herbs worked, Tetsu's chakra began to circulate more smoothly, his breathing deepening. Reiki kept a close watch, knowing that if this change continued as expected, Tetsu's Byakugan could become more powerful.
"This is just the beginning," Reiki thought, his mind already spinning with plans for further study.