Tanjiro encounters Mist Hashira Muichiro Tokito and Kotetsu, a boy from the village, arguing. Muichiro is demanding that a "certain key" be handed over to him from Kotetsu. Being unable to look on in silence, Tanjiro intervenes to speak on behalf of Kotetsu, however Muichiro refuses to listen. According to Kotetsu, the key is used to operate a battle-type Mechanical Doll, Yoriichi Type Zero, that mimics the movement of a certain real-life swordsman...
I was walking across a bridge,
feeling indescribably blissful...
...كنتُ أسير على جسر وتغمرني سعادة مفرطة
Über die Brücke zu laufen,
fühlte sich unbeschreiblich schön an,
Caminaba con una alegría indescriptible
sobre el puente.
Estaba caminando plácidamente
por el puente,
Mais alors que j’étais sur le pont,
empli d’un bonheur indescriptible,
मैं बेहद ख़ुश होकर
एक पुल पार कर रहा था…
Camminavo sulle mie gambe 
stranamente senza troppi problemi,
Eu caminhava por uma ponte, 
me sentindo também...
Кажется, я пересекал мост
с неописуемой лёгкостью в душе,