Chapter 12: Sun Breathing

"Thank you, sensei," I replied.

"Sakura, how can you become very strong in a very short time?" At first you look very weak; when you were in the academy, you were very good in ninjutsu, but your taijutsu was considered weak; now you are very good in kenjutsu. "With such a simple move, you manage to kill two people with ease," said Sasuke with a complicated expression because he wanted to become stronger in order to kill Itachi.

"To be honest, I created this technique just by looking at the human body; compared to other people, I have a low chakra reserve." So I invent a technique that doesn't require chakra; with proper breathing, I can increase my strength and speed multiple times. This technique goes very well if I use a sword; I can increase the effectiveness of this technique, which is why I changed my fighting style to "kenjutsu." Then I show them hinokami kagura, or Clear Blue Sky.

A massive flame sprayed out from my blade, shocking them all, and then I showed them again, this time using chakra.With chakra, my technique becomes three times more powerful, and my speed becomes three times faster than before.

"Did you notice, at first I only used proper breathing technique and it could generate a lot of power, but the second time I used a little chakra, it multiplied the power by three."

"Wow sakura i didn't know you were very strong", said Naruto.

"Sakura, can you teach me this technique?" said Sasuke. If it were three days ago, I might have kept it a secret because I don't have a disciple system, but right now, I don't intend to keep it a secret because the system will grant me a disciple system after my technique reaches 5% completion. Kakashi was dumbfounded; he didn't believe Sakura was very strong and just silently stared at me.

"Yeah sakura "I want to become strong too; please teach me this said Naruto.

"I can teach you, but do you remember 3 days ago when I suddenly grew taller? It was because of this technique."

"What?" exclaimed Naruto and Sasuke.

"To be honest, this is my forbidden technique; after I create this technique, my body goes past my limit." "To exact, after I use this technique, I grow taller just in one day. This means I can't live longer if I keep using this technique."

"What?" They were all taken aback.They didn't know such a simple technique was also dangerous.

Kage Bunshin No, jutsu is a forbidden technique because people might die using it; it draws a lot of chakra, and the user might become exhausted and die.

In Demon Slayer, the only person who can use this technique (sun breathing) is Yoriichi Tsugikuni; he is the person who knows how to fight others just by looking at them. His body is simply beyond logic; by using proper breathing, he can become very strong and fast. While others might die early by using this technique, his body can handle it very well. That's why he can live longer compared to others.

When he was young, he defeated all the other instructors and knew that his mom was very sick just by looking at her. He can hear, feel, and sense other people's weaknesses or strengths; in other words, he can perceive other people's weaknesses simply by looking at their opponent.Yoriichi has unparalled swordsmanship, extrasensory perception, immeasurable speed, reflexes, stamina, endurance, and strength.

Sun breathing is the most powerful breathing that he created, which is why during his era no one managed to learn from him because no one has the same body as him. Their bodies simply cannot handle it, which is why he developed other breathing techniques such as water breathing, thunder breathing, and many others so that others could use them to combat demons.

I might agree if someone said the character in the demon slayer body is weaker than Naruto, but Yoriichi Tsugikuni is simply beyond logic; he might be stronger than Maito Guy using the 8th gate.(His body can go past the limit of the human body; others might have burn marks on their bodies after using this technique and die early, but Yorichi didn't and he lived until old age.)

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