Tanjiro POV

  Mr. Iguro announced the start of the second phase of training: knowing how to master a Breathing. I had several questions in mind, so one that I absolutely want to ask.

Me: Mr. Iguro?

Iguro: What?

Me: What is a Breathing ?

Iguro: A Breathing ? How do I explain that to you? Basically, it's a Breathing.

(NDA: Really, unless you can't explain it.)

Iguro: Okay, I'll explain it properly. In short, it's a fighting style that allows you to defeat demons; to master this, you have to breathe in a way that your muscles contract, it's complete concentration.

Nezuko: What are the different Breathings ?

Iguro: There's the Sun Breathing, the Water Breathing, the Flame Breathing, the Thunder Breathing, the Stone Breathing and the Wind Breathing.  I use the Snake Breathing derived from the Water Breathing, but you can create another one or use the ones I suggested.

  After giving us some explanations, Mr. Iguro let us get to work. After a few days or even six months, Nezuko mastered more than half of the movements of the serpent's breath while I am stuck on the first one. It discourages me: what if I am not made to kill demons? I know that selling coal and dancing the Hinokami Kagura.

The Hinokami Kagura ? It strangelly looks like this style of battle. I will use this as my trump card against the demons. But the problem was that I was getting very tired.

After a year, Nezuko and I manage to master our respective Breathings without getting tired.

Iguro: I can't believe my eyes!

Nezuko: What's going on, Mr. Iguro?

Iguro: Your brother has mastered the famous Sun Breathing.

Me: Wait! You mean the Hinokami Kagura and the Sun Breathing are the same thing?

Iguro: I think so. Anyway, we're going to move on to the third and final phase of training.

I'm so happy: we'll be able to protect humans from demons; Nezuko with the Snake Breathing and I with the Sun Breathing.