As a Grey Knight In Naruto

Chapter 69 – "Fists, Food, and Fractures"

The afternoon sun hung low over Konoha's training fields, casting long shadows on the cracked earth. Heat shimmered in the air, and birds circled lazily overhead. But within the open clearing, the atmosphere was anything but calm.

With a loud boom, the ground splintered beneath Sakura Haruno's fist, a small crater forming where she struck. Dust exploded outward, and chunks of soil flew through the air.

Hajime stood just a few meters back, arms at his sides, expression calm. He hadn't moved much, just enough to let the strike miss by inches.

"You're leaning too far into the punch," he said, his voice even.

Sakura growled, panting lightly. "You could at least try to dodge like a normal person."

"I am dodging."

"No, you're shifting!"

Hajime's lips twitched slightly. "Then hit better."

At thirteen, Sakura had improved immensely, especially since Tsunade had passed more of her training to Hajime. Her chakra control had grown sharper, her medical knowledge deeper, but it was her strength that had truly changed. The special taijutsu Tsunade taught, using refined chakra control to amplify physical attacks, had turned her small frame into a compact missile of power.

Still, Hajime hadn't so much as flinched.

"You're too still," she said, trying to catch her breath. "Are you sure this is sparring and not bullying?"

"You asked to train."

"I didn't ask to punch air!"

"Then stop missing."

She rushed forward again, gritting her teeth. Her next punch came faster, tighter, aimed for his ribs this time. But Hajime pivoted his hips subtly, letting her arm slide past him. He placed two fingers against her back and tapped.

"Off balance."

"Argh!"

She stumbled forward and caught herself. Spinning on her heel, she tried to sweep his legs. He stepped over it, effortless.

"You're 2.2 meters tall," she muttered. "Your legs are like trees!"

"You're still shorter."

"I'm thirteen!"

Sakura's head barely reached his lower chest. She was tall for her age, but next to him, she felt like a kid sparring with a statue. A frustratingly unbreakable one.

Before she could charge again, a familiar voice rang out from behind.

"Hajime~!"

Sakura turned, recognizing the confident tone immediately.

Ino Yamanaka approached, hair tied up, wearing her usual violet attire from missions. She waved with one hand and held something in the other, a cloth-wrapped bento box.

"Training again?" Ino asked cheerfully. "You two sure spend a lot of time out here."

"Helps burn off steam," Hajime said.

Sakura crossed her arms. "More like I do all the work while he just breathes."

Ino stopped in front of Hajime and offered the lunchbox. "Well, maybe this will give you some energy to finally fight back. I made it special."

Before Hajime could reach for it, Sakura pulled something from her own bag, a different bento box, one she had kept wrapped carefully.

"I brought lunch, too," she said casually, not looking at Ino. "For after training."

Ino raised an eyebrow. "That so?"

"Yep. Full of protein and electrolytes. Training fuel."

"Mine has seasoned meat rolls and dessert."

Sakura tensed. "That's not healthy!"

"It's delicious."

They both turned to Hajime.

He looked at the two bento boxes. Then, without hesitation, said, "I'll eat both."

Ino blinked. "Both?"

"I'm still growing."

Sakura squinted. "You already tower over Tsunade-sama."

"I need the nutrients."

As if to prove it, he pulled out his own food container, a thick, heavy-looking lunch bar wrapped in wax paper. When he unwrapped it, it let out a low metallic clink against the bench beside him.

"What in the world…?" Ino murmured.

"Calcium bar," Hajime said simply.

"You chew that?" Sakura asked skeptically.

"Yes."

Ino leaned closer. "Is that… metal?"

"It's edible."

Both girls stared as he casually bit off a piece. It cracked audibly in his mouth like biting through porcelain. He chewed it like a granola bar.

"That can't taste good," Sakura said.

"It doesn't."

Sakura sat down with a sigh. "You're impossible."

"You're improving," he replied between bites.

She rolled her eyes. "Stop saying that like a catchphrase."

Ino settled beside him as well, laying out her bento beside Sakura's. "Well, you've got options now, Hajime. Two lunchboxes and a calcium brick."

He nodded. "Acceptable arrangement."

They ate together under the shade of a tree, the sounds of the training field replaced by birdsong and the rustling wind. Despite their earlier bickering, Sakura and Ino didn't argue again. They both watched as Hajime calmly and efficiently worked through both of their meals, thanking them only with small nods and quiet, "Good."

It was rare to see him speak much, but both girls had come to read his silences.

Ino leaned back and looked up at the sky. "You're not so bad when you're not being a training tyrant."

Hajime drank from his canteen. "I'm consistent."

Sakura chuckled softly. "Yeah. And impossible."

He didn't deny it.

Later that evening, long after the girls had gone home and the field was quiet again, Hajime returned to the sublevels beneath the Hokage Tower. His private lab welcomed him with the soft hum of filtered air and the soft glow from embedded light crystals.

In the center of the room, a reinforced containment pod pulsed faintly. Suspended inside was the next of his organs, the Haemastamen.

It was subtle in appearance, shaped like a hardened gland wrapped in vascular webbing. But its function was critical. Once implanted into one of the body's major blood vessels, the aorta, the inferior vena cava, or the femoral artery, it would bind directly to the flow of life itself.

Unlike the earlier organs, this wasn't meant to enhance strength or speed. The Haemastamen would instead alter the composition of his blood, allowing it to carry oxygen and nutrients more efficiently, resist fatigue toxins, and regulate clotting under extreme trauma. It was quiet work. Unseen. But vital.

Hajime had chosen the abdominal aorta as the implantation site, a thick arterial highway just beneath the diaphragm and between both hearts. Anchored there, the Haemastamen would be able to monitor and influence blood distribution across the entire body. Once active, it would become a hidden failsafe against shock, blood loss, and environmental strain.

He had already made the necessary preparations. Over the past weeks, his internal structure had adapted. His ribs had thickened and now overlapped like natural armor, forming a dense barrier around his thorax. The bone density wasn't decorative, it was functional, shaped to withstand trauma that would rupture a lesser body.

Hajime examined the containment pod one last time.

The nutrient flow was steady. The chemical suspension was stabilized. All readings were green.

He didn't smile.

He didn't speak.

But within his silver eyes, there was focus.

Absolute focus.

Only Tsunade knew what he planned next. She had reviewed the blueprints and diagrams with him in silence. Said nothing when he showed her the incision paths. Didn't flinch when he detailed the anchoring procedure.

No medical team. No assistants. No chakra.

Just his own hands.

His own will.

As always.