Akihiro was in his room, examining the contents of the Fuinjutsu scroll Miyuki had given him. The scroll was extensive, and the information within it felt overwhelming, even though it was beled as basic. Fortunately, it was written in a way that was easy to understand.

  —First, the nguage… —he murmured to himself, reading through the initial instructions.

  Each symbol had a specific function, but when combined with others, it changed and adapted. The symbols had to be inscribed with extreme care, ensuring they were correct, as a single mistake could lead to unpredictable results.

  His fingers traced the lines of a symbol he recognized: the Fire symbol.

  —One small error here, and this could blow up in my face… —he muttered to himself.

  Beyond the basic content, the scroll also described how to create a simple storage seal, an excellent starting point for a beginner. According to the information, the seal combined spatial symbols to create an invisible container. The most intriguing aspect was the inclusion of time symbols, which slowed the temporal flow within the seal, keeping any stored object in a preserved state, as if time itself had frozen.

  —It’s like writing code, but in another nguage… —Akihiro thought, a small smile forming on his lips. While he hadn’t studied programming in his previous life, he had once tried to create a video game as a kid, so he understood the basics of logic and programming nguages.

  This helped him grasp the importance of precision when creating a system. A poorly written symbol was like a missing semicolon in a program: a recipe for disaster.

  He set the scroll aside and pulled out a notebook filled with rough sketches and messy notes. It was the book he had been using since arriving in this world. There were only a few bnk pages left, as he had been using it for years, but he was too attached to it to repce it. Flipping to one of the st bnk pages, he began jotting down his notes on Fuinjutsu.

  Although his memory had never been bad, he had noticed a significant improvement since becoming a ninja. Now, he could recall even the smallest details from the day before. He assumed this was due to the increase in his spiritual energy, which seemed to be linked to his mind in some way.

  Once he finished his notes, he grabbed a fine brush and a bnk sheet of paper from a stack nearby. Taking a deep breath, he visualized the first symbol: a circle surrounded by parallel lines, all connected by small triangles. Drawing it was simple in theory, but the real challenge y in imbuing the stroke with his chakra so it wasn’t just another drawing on regur paper.

  Closing his eyes, he allowed his energy to flow toward the tip of the brush.

  His chakra control had been fine-tuned long ago, and now it was so precise that he could handle it even unconsciously. Infusing his chakra into an object was easy for him.

  The chakra accumuted in the brush carefully, avoiding overloading it and breaking it. With a precise movement, he began tracing the symbol, feeling how each line absorbed a fraction of his energy. When he finished, he set the brush aside and examined the symbol closely.

  —I think it's... okay? —he wondered, taking the paper in his hands and injecting it with chakra. However, nothing happened.

  —It didn’t work? —he muttered, frowning as he returned to the scroll.

  He carefully reviewed the instructions and soon found the answer. According to the text, the key y in the activation conditions. Without the correct symbols, many seals simply existed without purpose. They could be activated with words, gestures, or even a specific flow of chakra. The flexibility of the system was impressive, but also incredibly unstable if not done correctly.

  —I didn’t expect that, even in another world, I’d have to study a programming system from scratch... —he thought, sighing as he added the necessary activation symbols. Now he had a functional seal.

  When he injected chakra into the seal, the paper caught fire and was consumed until only ashes remained.

  —This time it worked —he murmured with satisfaction.

  He took another sheet and began tracing a new seal.

  Hours ter, his room was covered with papers filled with symbols and patterns. Time seemed to have stopped as he worked, completely absorbed in the process. Akihiro paused, observing the design he had just created. It was a simple yet functional seal: a storage space that could be opened with a small chakra discharge.

  —This should work —he told himself.

  It was already his tenth attempt. Fixing an error was more complicated than starting from scratch, so every time he made a mistake, no matter how small, he had to start over.

  —I envy the Uzumaki and their innate talent for Fuinjutsu... —he murmured, feeling a touch of frustration.

  He took a deep breath and pced his hand on the newly drawn seal, letting his chakra flow into it. But once again, nothing happened.

  —What went wrong this time? —he wondered. He carefully reviewed the design but found no errors. Then, suddenly, he remembered.

  —Oh, right... I didn’t put anything to store —he said, bringing the palm of his hand to his forehead with a slight gesture of frustration.

  He grabbed several papers and pced them over the paper with the storage seal.

  He injected his chakra again, and all the papers disappeared, absorbed by the storage seal and stored in a separate space.

  —It worked —Akihiro let out a relieved sigh. He had successfully created his first functional spatial seal.

  He let his body fall into the chair, exhausted. He had spent so many hours on this that even he was surprised. He hadn’t put as much effort into Genjutsu as he had into Fuinjutsu.

  —I guess it’s exciting. It reminds me of my childhood in a way —he said to himself, rubbing the area between his eyebrows, worn out. His eyes, hands, and head hurt. He was so fatigued that next time he’d stop before reaching this point.

  —I need to clean this up —he told himself, looking at his room. Papers were scattered everywhere, creating a mess that he didn’t like at all.

  As he gathered his tools, he couldn’t help but think about the possibilities that Fuinjutsu now opened up for him. Sure, things like time control or space manipution seemed impossible without using enormous amounts of chakra. But finding a use for combat didn’t seem unfeasible. After all, explosive seals existed, and even in the original work, the Adamantine Sealing Chains were used, a unique sealing technique of the Uzumaki cn. If he managed to create something simir, he’d be invincible against ninjas without kekkei genkai.

  —The more I learn about this world and its mysteries, the less I understand —he thought, as he finished cleaning up the room.

  —I’m going to take a bath —he said quietly, leaving the room and heading to the bathroom. He passed through the living room to tell his mother he’d be taking an early bath.

  But what he found were unexpected people.

  In the living room, he saw his mother sitting next to the neighbor, both having tea and chatting cheerfully. In the back, sitting on the sofa, was Nao, his childhood friend. He saw her smile upon noticing his presence, and a slight blush appeared on his face.

  —Nao? —Akihiro asked, surprised to see her there.

  Nao raised her hand in greeting, showing a smile that mixed nostalgia and complicity. Akihiro sighed, knowing he wouldn’t be able to take a bath and rest anytime soon.