Demon Slayer; The Moth Of Wisteria

Ending of Mount Natagumo Arc (Episode 20,21)

(I'll be adding in episode 21 also, since I believe that episode 20 won't be enough to meet my standard writing requirements, I won't be adding the whole backstory nor Shinobu's scene.)

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Rui's head went flying as both his and Tanjiro's body went limp. Shizen then appeared with Nezuko nearby.

Tanjiro:
"Nezuko!"
"I-I won!"
"Father saved me.."
'I'm not sure why I was able to unleash that attack with the kagura that's been in our family for generations.'
'But that was what saved me!'
'I was able to beat him!'

Tanjiro saw Shizen putting Nezuko sitting on the ground, and went up to the laying Tanjiro.

"Huh?"
'I can't see Nezuko and Shizen well...'
'Is it because I was reckless with my breathing?'

Suddenly, a loud ring appears inside Tanjiro's ear.

'This ringing in my ears is brutal!'
'My whole body is throbbing with pain!'
'I gotta...'
'heal fast!'
'I'm still not done fighting!'

Shizen:
"You did well, Tanjiro."

Tanjiro:
"Sh-Shi-zen..."

Shizen:
"Don't push yourself, I shall take care of everything here."

Tanjiro realized that what Shizen meant is not for him to relax as the latter will help Inosuke, but instead it made sense to him when the scent of blood suddenly got stronger.

Tanjiro:
'There's no smell of ash...'
'Don't tell me!'
"Even though I cutted his head?!"

Shizen:
"Indeed."

Rui:
"You thought you'd defeated me?"
"Poor kid."
"Did your pathetic delusion bring you joy?"
"I cut my own head off with my threads..."
"before you could cut it off."
"Enough."
"I'll kill both you and your sister."
"I haven't been this enraged in a long time."

Shizen:
"Honestly you're so annoying. Bla bla bla, is that all you can do?"

Tanjiro suddenly felt the world spin for a split second, then he found himself next to a sitting Nezuko who hugged him. He realized it was Shizen, who had placed him near Nezuko. He turned around to see Shizen abandoning his umbrella, only taking out his rapier.

Rui:
"But I wonder how you didn't get burned."

He reattached his head to his body.

"Me and my threads were the only thing that was set ablaze."
"I don't know if it's your sister's power, but thanks for getting me enraged."
"Now I can carve you up without regrets."

Shizen:
"Let me remind you that I am your opponent."

Rui:
"Quiet."
"Blood Demon Art; Murderous Eye Basket."

Red strings began appearing in an enclosed cage around Shizen and Tanjiro, however just before it was able to tighten itself, Shizen had cut the threads in speed that none have ever seen before. He didn't even move.

"Tch, you!"

Rui sent even more threads at Shizen, who just stood there not moving, smiling an almost sadistic smile. Then Shizen did move, for about three steps. Then all of Rui's strings and threads as well as his arms and legs got cut off. Rui's shock turned into anger as he began to slowly regenerate. Countless times he tries to even graze Shizen, yet all those times were in vain.

"No matter how many times you do this, you're just tiring yourself!"

Shizen:
"Am I? Because it looks like you're the one tiring."