Demon Slayer : Kimetsu no Yaiba (chapter 21 explanation)

 

Chapter 21:- Drum house

Tanjiro distraughtly realizes the man that fell out of the house is already dead, upset at the amount of pain he must've felt. Shoichi tells him their brother was wearing a persimmon-colored kimino and the man that had just perished was not him. Tanjiro internally apologizes to the deceased man, promising to give him a burial when he returns. He calls for Zenitsu to join him on the mission to defeat the Demon in the house, but after looking at Zenitsu's distressed face, angrily goes on alone. Scared by Tanjiro's furious expression, Zenitsu reluctantly tags along. Before they enter the house, Tanjiro entrusts Nezuko's box to the two children, telling them that what's in the box will protect them in case of danger.

Tanjiro and Zenitsu entering in drum house

As the two Demon Slayers enter the house, Zenitsu trembles and confides in Tanjiro to protect him. Tanjiro apologizes to Zenitsu, saying he has multiple broken bones and Zenitsu cries in shock, protesting that he was no longer safe without someone to protect him despite Tanjiro's attempts to comfort him. Shoichi and Teruko run inside the house, frightened by the noises coming out of Tanjiro's box and a troubled Tanjiro tells them they couldn't just leave it outside as it was more important than his life.

Tanjiro faces Kyogai (The master of the house) 

Suddenly, the group hears a sound and accidentally split off, Zenitsu with Shoichi and Tanjiro with Teruko. The latter pair is stunned to see the room change, Tanjiro noticing how it shifted with a drum's beat. He apologizes to Teruko for separating from her brother and vows to protect her, wiping her tears. They hear footsteps and are shocked by the sudden presence of Kyogai in the hallway. Tanjiro immediately deciphers him to be the master of the house; his scent was the strongest and covered a broad range of the building.

Tanjiro attack on demon

Somewhere else, Zenitsu wails about his certain death while Shoichi simultaneously calls out for Teruko. Zenitsu pulls Shoichi and tells him they should go outside, but Shoichi turns around and reprimands him for his cowardice. Zenitsu is hurt by his words and argues that children should not be involved in this situation. They make their way down the hall and through doors, but fail to find the entrance. Opening a set of doors, Zenitsu comes face-to-face with an individual wearing a boar hide mask. Zenitsu calls him a monster, and the individual runs out of the room and rushes through a hallway.

Zenitsu meet Boar mask guy

Back at another room in the house, Tanjiro covers Teruko's mouth, informing her not to scream and to hide behind the shelves. Kyogai speaks, annoyed at the number of people barging into his home and calls them his prey. Tanjiro's inability to ambush makes him call out to Kyogai instead, introducing himself as a Demon Slayer and the one that will defeat him. Kyogai ignores him and mutters about a person with special blood as Tanjiro goes to attack. However, the Demon suddenly beats a drum and the entire room rotates, Tanjiro speculating the change to be a result of the Demon's Blood Demon Art. He senses a new smell and the boar-masked human crashes through the wall.