New Ability - Naruto: The Burning Spiral

I slowly opened my eyes and noticed that I was in a hospital bed. 'What happened? Did I faint?'

I was fighting those bandits and then...

My eye widened slightly as I remembered the scene, blood and gore everywhere, my clothes covered in blood.

I quickly removed the blanket and saw that my clothes were changed and there was no blood.

Why am I freaking out? It's a ninja's job to kill people and I knew that before going on the mission. I guess I didn't realize how impactful it would be to a person who's never killed even an animal.

Yuki's coming towards this room, but how do I know that? I am not even trying to sense anyone, it's like a sixth sense. I can even sense the people in the other room without even trying. What is this feeling?

Before I could process anything further, the door opened, revealing Yuki.

Yuki saw Kazuki sitting on the bed, clutching his head slightly.

She quickly rushed towards Kazuki and hugged him tightly.

Tears flowed from her eyes as she said, "Why did you make me worry so much, you idiot! I was so afraid that something happened to you."

Kazuki froze as he realized, 'It was because of the chakra pill that I fainted and I made her worry so much. How bad she would have felt, Keiko got injured in her first mission and then I fainted on the second.'

"I am sorry." Kazuki replied and then gently placed his hand on her head, "I won't do it again."

She pulled back after a few seconds and wiped her tears.

"Why did you use chakra pill?" Yuki asked.

Kazuki hesitantly replied, "Ah, well."

Yuki stared at him with a serious expression.

"Alright, I'll tell you, it was because I sneaked out at night to train." Kazuki said hesitantly.

Yuki said, "And why would you do that?"

Kazuki said, "Promise me that you won't tell anyone, not even your dad."

"Okay, I promise I won't tell anyone." Yuki replied after a pause.

"You remember that old man I was talking about." Kazuki asked.

"Yeah, the one you went training with? Wasn't he a fraud?" Yuki asked.

"No, he was actually Jiraiya, one of the Legendary Sannin," Kazuki said.

Yuki's eyes widened. "H-how did he even agree to train you?"

"It was difficult but I managed to make him train me and he gave me a scroll for a fire style jutsu which I was training in secret." Kazuki said.

"So, where is that scroll?" Yuki asked.

"Ahhh! Where's my belt pouch." Kazuki panicked.

"It's right over there." Yuki pointed at the desk beside him and chuckled.

"Oh! Thanks." Kazuki replied.

Kazuki took out the scroll and handed it to Yuki.

Yuki's eyes widened as she read the scroll.

"This is insane!" She spoke.

"Do you think you can learn this?" Yuki asked.

"I think I can, but not anytime soon, he said that I need more chakra to safely practice this." Kazuki replied.

"Makes sense." Yuki said. "So, what will say to Sensei and Ryuma about the chakra pill?"

"I'll say that I was learning Fuinjutsu at night and I ate the pill so that I wouldn't fall asleep but I don't understand why I fainted. Weren't the aftereffects of the pill supposed to make you sleepy?" Kazuki asked.

"Huh! Don't you know that it's not safe for children below 12 to consume the pill?" Yuki replied in confusion.

"There is a children's edition, though, but it doesn't boost chakra regeneration." She said after a pause.

Kazuki was in his house, thinking about something with a serious expression on his face.

Kazuki thought, 'What is this feeling? It's like I can sense every single person in the surrounding area without any effort. Is there something I'm missing? Was there any ability like this in the anime? It's been more than 10 years since I watched anything about the anime, let's recall it. who had the best sensing ability in Naruto?'

After a few minutes, he finally remembered something, 'Is it Karin's ability? I don't remember its name but it was something unique to Uzumaki clan, through which she could sense people from several kilometers away, but I can only sense a few dozens of meters.'

Kazuki closed his eyes and started to focus. After a few seconds of focusing, something clicked in his mind, suddenly he could feel the chakra of every single person in the village. He could see their chakra as different colors and could even determine how much chakra they had.

He tried to pinpoint a specific chakra signature, after searching for a few minutes, he found it, a huge amount of chakra. It gave him a warm feeling, which felt really good. Kazuki looked deep inside him and felt a really dark chakra that emitted hatred.

Kazuki smirked and said, "Can't believe I just sensed Kurama's chakra. This ability is so broken, the Uzumaki clan's special ability. It's a shame that I don't remember its name. Perhaps I can look it up in the library.

Kazuki spends the whole day testing the limits of his ability, he found out that he can passively sense chakra around him in a small distance, he can tell people's chakra reserves and distinguish people from their unique chakra signature and all this without putting in any effort.

When he closes his eyes and focuses, he can sense chakra dozens of kilometers away from him and can even tell people's chakra natures.

Then, using his shadow clones, he tested if sensors will be able to tell that they have been sensed or not and it turns out that if Kazuki uses his passive ability to sense someone nearby, even veteran sensors won't notice, but if he tries to sense someone by closing his eyes and focusing, then a sensor can tell that he has been sensed if he's alert.

Kazuki found out one more thing about his ability, he can completely erase his chakra presence if he wants but then he won't be able to use any jutsu or use the better version of his sensing ability, which can sense for kilometers.