It was the 53rd year of Konoha. In the Land of Fire, within Konoha Village, six-year-old Ren meticulously read the "Chakra Extraction" scroll before him, absorbing every piece of knowledge. As a transmigator, he naturally understood the dangers of the Naruto World. Without sufficient strength, he'd be nothing more than cannon fodder. Even though he was still young, all his free time had to be spent on cultivation, dedicated to improving his strength. The first step to becoming a ninja was extracting chakra!
Minutes passed as Ren, deep in thought, comprehended the intricacies of chakra extraction.
Just then, a "squeak" sounded as his room door suddenly pushed open. A little girl with two ball-shaped buns framing her face poked her head in, shouting in a milky voice, "Big brother, the meal is ready! Come and eat!"
"Got it, TenTen," Ren replied with a smile, pausing his studies.
This little girl with the bun hairstyle was TenTen, a companion to Neji and Rock Lee in the original story. While adorable, she was canonically depicted as somewhat weak. It was unexpected that in this life, Ren had become her brother. That's right, he'd crossed into the Naruto world, but he wasn't an orphan. Instead, he was born into a civilian family with living parents, a harmonious home, and a lovely younger sister, TenTen.
Their family ran a weapon shop on the streets of Konoha Village. As merchants, their parents often left the village for supplies. So, for the last few days, it had just been Ren and TenTen at home. Cooking duties had fallen to TenTen, who genuinely enjoyed it.
"Big brother, quickly! Taste what I've made, is it delicious?!" TenTen asked, her face alight with anticipation.
Ren, who'd been eating instant noodles for a few days, saw two steaming bowls of ramen on the table. His eyes instantly lit up. "Ramen? Sister, you're amazing!" Smelling the aroma, Ren suddenly felt ravenous.
"I'm starting!"
The sounds of the two siblings slurping noodles filled the quiet room.
---
After dinner, Ren returned to his room, unrolled the "Chakra Extraction" scroll, and continued his practice. Normally, practicing ninjutsu while refining chakra would significantly boost efficiency. It was a pity, though, that Ren's parents were both civilians. There were no ninjutsu scrolls or arcane scrolls in their family. Ninjutsu scrolls were the most precious wealth of any family, even a village. Aside from attending the ninja academy, many from ordinary families found it difficult to learn ninjutsu in their lifetime, sometimes even failing to extract chakra. Before the Second Hokage established the ninja academy, almost all ninjas came from major clans, leaving commoners no chance of becoming one. Fortunately, this situation had changed considerably.
Ren's family happened to be in the ninja tool business. While his father wasn't a ninja, his business often put him in contact with them. He'd used these connections to find a way to spend money and acquire these scrolls about chakra refining for Ren.
After reading all the contents of the scroll, Ren closed his eyes, ready to begin extracting chakra. The so-called chakra was simply a name for energy in the Naruto world. Refining chakra was the process of absorbing body energy from the human body's 130 trillion cells. This energy was divided into two kinds: physical energy and spiritual energy. Following the method described in the scroll, Ren extracted these two energies from his body's cells, constantly trying to gather and combine them...
Finally! The first thread of chakra appeared in his body! The whole process took less than three minutes—incredibly fast.
As a little happiness bloomed in Ren's heart, an electronic female voice sounded in his mind:
[Ding! Sensing Chakra! Congratulations to the host for successfully activating the "God-Level Forging System"! ]
[The system panel opens... ]
A translucent virtual panel appeared before him.
[Host: Ren]
[Age: 6 years old]
[Forging Level: Beginner]
[Unlocked Weapons: None]
[Self-Created Weapons: None]
"God-level forging system?" Ren was slightly surprised, then quickly calmed down, thinking, "Is this a system that helps you build weapons?" He pondered further. "No, since it needs chakra to activate, maybe the forged items aren't just ordinary weapons. They might even be artifacts like the Bashōsen (Banana Fan) or the Six Paths Staff!" Ren's eyes lit up instantly, curious about the system's capabilities.
At that moment, the system's voice sounded again:
[Ding! Mission Release: Crude Iron (100g)]
[System Reward: Primary Forging Blueprint - Avatar Kunai]
"So simple?" Ren mused. "Only 100 grams of crude iron to complete the task?" After a brief hesitation, he quickly figured it out. It was likely because the system had just been activated, making the initial task relatively simple. Crude iron was one of the most common raw materials, used for everyday ninja tools like kunai and shuriken.
Ren's family already owned a weapon shop, so there was plenty of idle crude iron in the yard. He just took a fist-sized chunk, which was more than enough to complete the task.
[Ding! Mission completed! ]
[System Reward: Elementary Forging Blueprint - Avatar Kunai has been issued! ]
A flood of information surged into Ren's mind. He had instantly obtained the forging method for the Avatar Kunai.
[Clone Kunai:]
[Forging Difficulty: ☆]
[Skill: Instantly release the Clone Jutsu to form a material clone]
"What a magical forging technique!" Ren couldn't help but exclaim with emotion after deepening his understanding of blacksmithing. He couldn't wait to start trying to create this Clone Kunai immediately. "There's a small forge in the backyard; I can go there and try it!"
Although it was getting late, the excited Ren was full of energy. He immediately dashed to the small forging shed in the backyard. Lighting the charcoal fire, he pulled the bellows, placed the crude iron, and began to swing the hammer, ready to forge!
Clang!Clang!Clang!
The crisp sounds of striking metal rang out as sparks flew. At only six years old, Ren needed all his strength to wield the hammer. After just a few powerful swings, his strength was completely spent. He rested for a while, regaining some energy, before raising the hammer once more. He repeated this process several times, sweat dripping from his brow. On the anvil, the shape of a kunai gradually took form.
Three hours later, Ren gazed at the finished kunai before him. A faint, dark sheen covered its surface, and his eyes sparkled with uncontrollable joy. He had created the Clone Kunai!